JP5982336B2 - Representative color determining device, representative color determining method, program, and recording medium - Google Patents

Description

  The present invention relates to a representative color determination device, a representative color determination method, a program, and a program for determining a representative color of a product when the observer views from a predetermined observation distance according to an observation distance representing a distance from the observer to the product The present invention relates to a recording medium.

  For example, consider a case in which a black and white striped clothing is purchased by electronic commerce (so-called net shopping) using a computer network such as the Internet using a PC (personal computer) or the like. In this case, the purchaser operates the PC or the like to display an image of the clothing on the display device of the PC, and looks at the clothing image displayed on the display device to decide whether or not to purchase the clothing. To do.

  Thus, when the purchaser looks at the image of the product displayed on the display device and decides whether or not to purchase the product, the color pattern of the product determines the purchase of the product for the purchaser. It becomes an important factor when doing.

  For example, Patent Document 1 discloses customer preference text information based on a database for each customer that stores preference information for customer products among products stored in a product information database in which product information is registered in advance. Electronics that can search for products that match the customer's favorite color and search for products that match the customer's favorite color in a color space that does not depend on the device, and can search for products that match the customer's specified favorite color. A shopping device is described.

  However, the color of merchandise with a color pattern changes greatly according to the observation distance from the observer to the merchandise. In Patent Literature 1, when a purchaser views an image of a product displayed on a display device, it is not considered that the color of the product changes depending on the observation distance.

  In the case of clothes with a colored pattern, when an observer views the clothes from a relatively close position, it can be recognized as a stripe pattern of a predetermined color or a check pattern. However, when the observer sees the clothes from a position farther than a predetermined distance, the color patterns of the clothes may be mixed and recognized as if they were plain clothes of mixed colors. . Thus, the color of a product with a color pattern changes according to the observation distance.

  In Patent Document 1, it is possible to search for a product having a device-independent color that matches a favorite color designated by a customer. However, there is a problem that it is not possible to confirm in advance before purchasing a product how the color of the product changes according to the observation distance.

  In addition to Patent Document 1, there are Patent Documents 2 to 4 as prior art documents relevant to the present invention.

JP 2002-24263 A JP 2006-350546 A JP 2010-134567 A JP 2012-203837 A

  The purpose of the present invention is to solve the problems of the prior art and confirm the color of the product when the observer sees it from a predetermined observation distance when viewing the product image displayed on the display device. Another object is to provide a representative color determining device, a representative color determining method, a program, and a recording medium.

In order to achieve the above object, the present invention provides an observation distance information input unit for inputting information on an observation distance representing a distance from an observer to a product,
A product information storage unit that stores information on the product image and the repetition frequency and contrast of the color pattern of the product extracted from the product image;
A partial color acquisition unit that divides a product region included in the product image into a plurality of partial color regions and acquires information on colors included in each partial color region;
A visual characteristic information storage unit that stores information on the relationship between spatial frequency and contrast as information on human visual characteristics,
Based on the information on visual characteristics, the position corresponding to the information on the observation distance based on the information on the observation distance, the repetition frequency of the product color pattern, and the information on the contrast, the color pattern included in each partial color area A representative color calculation unit that determines whether or not it is included in an area that can be distinguished, and calculates a representative color of each partial color area from color information included in each partial color area according to the determination result And a representative color determining device.

  Here, the representative color calculation unit obtains the spatial frequency of each partial color region from the information on the observation distance and the information on the repetition frequency of the color pattern of the product, and information on the obtained spatial frequency and the product contrast To determine whether the position corresponding to the observation distance information is included in an area where the observer can discriminate the color pattern included in each partial color area based on the visual characteristic information It is preferable that

  In addition, the representative color calculation unit, when the position corresponding to the observation distance information is included in an area where the observer cannot distinguish the color pattern included in each partial color area, the color included in each partial color area It is preferable that a mixed color obtained by mixing the two is calculated, and the calculated mixed color is determined as a representative color of each partial color region.

  The representative color calculation unit preferably calculates a mixed color by performing a weighted average of two or more colors according to the ratio of the areas of two or more colors included in each partial color region.

The representative color calculation unit
A filter for filtering each partial color region;
From the information on the observation distance, the repetition frequency of the color pattern of the product, and the information on the contrast, the cutoff frequency of the filter is calculated based on the information on the visual characteristics, and the calculated cutoff frequency is set in the filter,
It is preferable to include a filtering unit that outputs a mixed color by filtering each partial color region using a filter in which a cutoff frequency is set.

  Further, the cutoff frequency calculation unit calculates the difference between the position corresponding to the observation distance information and the position of the boundary between the area where the observer can distinguish the color pattern included in each partial color area and the area where the pattern cannot be distinguished. Accordingly, it is preferable to calculate the cutoff frequency of the filter.

  The cutoff frequency calculation unit preferably increases the cutoff frequency of the filter as the difference becomes smaller and lowers the cutoff frequency of the filter as the difference becomes larger.

  In addition, the representative color calculation unit determines whether the position corresponding to the observation distance information is included in an area where the observer can distinguish the color pattern included in each partial color area according to the cutoff frequency of the filter. It is preferable to determine whether or not.

  In addition, the representative color calculation unit includes a position corresponding to the observation distance information included in each partial color region when the observer includes a color pattern included in each partial color region. Preferably, one of the above colors is selected and the selected color is determined as the representative color of each partial color region.

  Moreover, it is preferable that a representative color calculation part selects a color with the largest area among two or more colors contained in each partial color area as a representative color of each partial color area.

The present invention also includes a step of receiving observation distance information representing the distance from the observer to the product;
Dividing the product area included in the product image into a plurality of partial color areas, and obtaining information on the colors included in each partial color area;
Obtaining information on the product image and the repetition frequency and contrast of the product color pattern extracted from the product image;
Obtaining information on the relationship between spatial frequency and contrast as information on human visual characteristics;
Based on the information on visual characteristics, the position corresponding to the information on the observation distance based on the information on the observation distance, the repetition frequency of the product color pattern, and the information on the contrast, the color pattern included in each partial color area Determining whether or not the image is included in a distinguishable area, and calculating a representative color of each partial color area from information on colors included in each partial color area according to the determination result. A representative color determination method is provided.

  Here, the spatial frequency of each partial color region is obtained from the information on the observation distance and the information on the repetition frequency of the product color pattern, and the information on the visual characteristics is obtained from the obtained spatial frequency and the information on the contrast of the product. Based on the above, it is preferable to determine whether or not the position corresponding to the observation distance information is included in an area where the observer can distinguish the color pattern included in each partial color area.

  In addition, when the position corresponding to the information on the observation distance is included in an area where the observer cannot distinguish the color pattern included in each partial color area, a mixed color obtained by mixing the colors included in each partial color area is used. It is preferable to calculate and determine the calculated mixed color as a representative color of each partial color region.

  Moreover, it is preferable to calculate a mixed color by performing a weighted average of two or more colors according to the ratio of the areas of two or more colors included in each partial color region.

Further, from the information of the observation distance, the repetition frequency of the color pattern of the product and the information of the contrast, calculating the cutoff frequency of the filter based on the information of the visual characteristics, and setting the calculated cutoff frequency in the filter;
It is preferable to include a step of outputting a mixed color by filtering each partial color region using a filter in which a cutoff frequency is set.

  Also, the filter is cut off according to the difference between the position corresponding to the information on the observation distance and the position of the boundary between the area where the observer can distinguish the pattern included in each partial color area and the area where the pattern cannot be distinguished. It is preferable to calculate the frequency.

  Further, it is preferable that the cutoff frequency of the filter is increased as the difference becomes smaller, and the cutoff frequency of the filter is lowered as the difference becomes larger.

  Further, according to the cut-off frequency of the filter, it is determined whether or not the position corresponding to the observation distance information is included in an area where the observer can discriminate the color pattern included in each partial color area. Is preferred.

  Further, when the position corresponding to the information on the observation distance is included in an area where the observer can distinguish the color pattern included in each partial color area and an area where the pattern cannot be distinguished, two or more included in each partial color area Preferably, one of the colors is selected, and the selected color is determined as the representative color of each partial color region.

  In addition, as a representative color of each partial color region, it is preferable to select a color having the maximum area among two or more colors included in each partial color region.

  The present invention also provides a program for causing a computer to execute each step of the representative color determination method described above.

  The present invention also provides a computer-readable recording medium on which a program for causing a computer to execute each step of the representative color determination method described above is recorded.

  In the present invention, the representative color of each partial color region of the product having a color pattern is calculated according to the information on the observation distance. Therefore, when a product purchaser views an image of a product displayed on a display device such as a PC to which the present invention is applied, the purchaser simulates the color of the product when viewed from a predetermined observation distance. It is possible to reproduce the state close to the actual use scene of the product before purchasing the product and determine whether to purchase the product. It can also be used for coordination, etc., using the difference in the appearance of the product according to the observation distance.

It is a block diagram of one embodiment showing composition of a representative color deciding device of the present invention. It is an example of a Campbell chart. It is a graph of an example showing the relationship between a spatial frequency and contrast sensitivity. It is an example of a graph showing the position corresponding to the information of observation distance. 2 is a flowchart illustrating an example of an operation of the representative color determination device illustrated in FIG. 1. It is a conceptual diagram of an example showing the relationship between an observation distance and a spatial frequency. It is a block diagram showing the structure of the representative color calculation part in the case of calculating the mixing color of the mixing ratio according to an observation distance. It is a flowchart of an example showing operation | movement of the representative color determination apparatus provided with the representative color calculation part shown in FIG.

  The representative color determining apparatus, representative color determining method, program, and recording medium of the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

  FIG. 1 is a block diagram of an embodiment showing a configuration of a representative color determination device of the present invention. The representative color determination device 10 shown in the figure determines a representative color of a product when the observer views from a predetermined observation distance according to an observation distance representing a distance from the observer to the product. A distance information input unit 12, a product information storage unit 14, a partial color acquisition unit 16, a visual characteristic information storage unit 18, and a representative color calculation unit 20 are provided.

The observation distance information input unit 12 is an input device such as a keyboard for inputting observation distance information. In other words, the representative color determination device 10 receives information on the observation distance input by the user (for example, a purchaser of the product) via the observation distance information input unit 12.
Here, the product has a pattern of two or more colors and is worn by the purchaser, and examples thereof include black and white striped clothes.

The merchandise information storage unit 14 stores merchandise information, for example, merchandise images, information on the repetition frequency and contrast of merchandise color patterns extracted from the merchandise images, and the like.
Here, when the product is the above-described black and white striped clothing, how many times the striped pattern is repeated within a predetermined interval, for example, 10 cm. Is information.

The partial color acquisition unit 16 divides the product region included in the product image acquired from the product information storage unit 14 into a plurality of partial color regions, and acquires color information included in each partial color region. is there.
The size of the partial color region, the number of divisions, etc. are not limited at all, and can be set to desired values.

  The visual characteristic information storage unit 18 stores information on the relationship between spatial frequency and contrast, for example, information such as a Campbell chart and contrast sensitivity, as human visual characteristic information.

FIG. 2 is an example of a Campbell chart. The horizontal axis of the Campbell chart represents the spatial frequency, and the vertical axis represents the contrast. In the figure, the spatial frequency increases on the right side and decreases on the left side. On the other hand, the contrast increases toward the lower side and decreases toward the upper side. Spatial frequency represents the number of fringes (cycles / degree) included in one viewing angle.
As can be seen from the Campbell chart, as the contrast decreases even at the same spatial frequency, humans cannot discriminate the stripe pattern at a certain boundary, and the area is divided into an area where the stripe pattern can be distinguished and an area where the stripe pattern cannot be distinguished. .

FIG. 3 is a graph showing an example of the relationship between the spatial frequency and the contrast sensitivity. In this graph, the horizontal axis represents spatial frequency, and the vertical axis represents contrast sensitivity. In the figure, the spatial frequency increases on the right side and decreases on the left side. On the other hand, the contrast sensitivity increases when going downward and decreases when going upward. The contrast sensitivity represents a boundary between a region where a human can discriminate a striped pattern and a region where the human cannot discriminate in the Campbell chart.
As shown in this graph, the spatial frequency with the highest human contrast sensitivity is around 3 cycles / degree, and the contrast sensitivity decreases as the spatial frequency increases or decreases.

  The representative color calculation unit 20 uses the observation distance information input via the observation distance information input unit 12, the product color pattern repetition frequency and contrast information acquired from the product information storage unit 14, and the visual characteristic information storage unit. The position corresponding to the observation distance information, for example, the position on the Campbell chart shown in FIG. 2, based on the human visual characteristic information acquired from 18, shows the color pattern included in each partial color area by the observer. It is judged whether it is included in an area that can be discriminated or in an area that cannot be discriminated, and each partial color area is determined from the color information contained in each partial color area according to the determination result. The representative color is calculated.

  FIG. 4 is a graph illustrating an example of a position corresponding to observation distance information. This figure shows positions corresponding to observation distance information in the graph shown in FIG. As shown by a dotted line in the figure, for example, the position of the intersection of the spatial frequency obtained from the information on the observation distance and the information on the repetition frequency of the product color pattern and the information on the product contrast acquired from the product information storage unit 14 Represents a position corresponding to the observation distance information.

Next, the operation of the representative color determination device 10 will be described with reference to the flowchart shown in FIG.
Here, it is assumed that a product image having two or more color patterns is selected from the product images stored in the product information storage unit 14 by the user of the representative color determination device 10.

  When the image of the product is selected by the user of the representative color determination device 10, the partial color acquisition unit 16 acquires the image of the selected product from the product information storage unit 14. When acquiring the product image, the partial color acquisition unit 16 divides the product region included in the acquired product image into a plurality of partial color regions, and acquires information on the colors included in each partial color region ( Step S1). The acquired color information of each partial color region is input from the partial color acquisition unit 16 to the representative color calculation unit 20.

  Subsequently, the representative color determination device 10 receives information on the observation distance input by the user of the representative color determination device 10 via the observation distance information input unit 12 (step S2). The received observation distance information is input from the observation distance information input unit 12 to the representative color calculation unit 20.

  As described above, when a product image is selected by the user of the representative color determination device 10, the representative color calculation unit 20 selects the selected product image and the selected product image from the product information storage unit 14. Information on the repetition frequency and contrast of the product color pattern extracted from the image is acquired (step S3).

  Subsequently, the representative color calculation unit 20 acquires information on the relationship between the spatial frequency and the contrast from the visual characteristic information storage unit 18 as information on the human visual characteristic (step S4).

  When the color information of each partial color area is input from the partial color acquisition unit 16 and then the observation distance is input from the observation distance information input unit 12, the representative color calculation unit 20 receives the observation distance information, the product Based on information on human visual characteristics, the position corresponding to observation distance information allows the observer to discriminate the color patterns included in each partial color area from information on the repetition frequency and contrast of the color pattern (Step S5).

  For example, the representative color calculation unit 20 obtains the spatial frequency of each partial color region from the information on the observation distance and the information on the repetition frequency of the color pattern of the product.

  As described above, the spatial frequency represents the number of fringes (cycle / degree) included in one viewing angle, and thus changes according to the observation distance. As shown in FIG. 6, it is assumed that the spatial frequency corresponding to the information on the repetition frequency of the product color pattern when the observation distance is D0 is F0. When the observation distance becomes D1 shorter than D0, the number of fringes included in one viewing angle decreases, so the spatial frequency becomes F1 smaller than F0. On the contrary, when the observation distance becomes D2 longer than D0, the number of stripes included in one viewing angle increases, so that the spatial frequency becomes F2 larger than F0.

  Subsequently, the representative color calculation unit 20 determines the position corresponding to the observation distance information based on the visual characteristic information from the spatial frequency obtained from the observation distance information and the product contrast information. It is determined whether or not the color pattern included in each partial color area is included in the distinguishable area.

  For example, in the Campbell chart of FIG. 2, the representative color calculation unit 20 obtains a position corresponding to the spatial frequency obtained from the observation distance information and the product contrast information. When the obtained position is in a region below the curve of contrast sensitivity in FIG. 3, the position of the observation distance is included in a region where the observer can distinguish colors included in each partial color region. It can be judged. On the other hand, when the obtained position is in the area above the contrast sensitivity curve, the position of the observation distance is determined to be included in the area where the observer cannot distinguish the colors included in each partial color area. can do.

  Then, the representative color calculation unit 20 determines the representative color of each partial color area from the color information included in each partial color area according to the determination result (step S6).

  When the position corresponding to the information on the observation distance is included in an area where the observer cannot distinguish the color pattern included in each partial color area, the representative color calculation unit 20 selects the color included in each partial color area. The mixed color mixture is calculated, and the calculated mixed color is set as the representative color of the corresponding partial color region. In this case, for example, the representative color calculation unit 20 can calculate a mixed color by performing weighted averaging of two or more colors according to the ratio of the areas of two or more colors included in each partial color region. .

  Further, the representative color calculation unit 20 has a boundary (that is, contrast sensitivity) between a position corresponding to the observation distance information and an area where the observer can distinguish the color pattern included in each partial color area and an area where the pattern cannot be distinguished. The mixing ratio of the mixed colors can be changed as appropriate according to the difference from the position of the curve.

  As described above, the position corresponding to the observation distance information is obtained from the spatial information obtained from the observation distance information and the repetition frequency information of the product color pattern, as shown in FIG. It is the position of the intersection with the information of the contrast of the selected product. The difference between the position corresponding to the observation distance information and the position of the boundary between the area where the color pattern can be distinguished and the area where the color pattern cannot be distinguished is the difference between the position corresponding to the observation distance information and the contrast sensitivity curve. Represents distance.

  FIG. 7 is a block diagram illustrating a configuration of a representative color calculation unit in the case of calculating a mixed color having a mixing ratio according to the observation distance. The representative color calculation unit 20 shown in the figure includes a filter 22, a cut-off frequency calculation unit 24, and a filtering unit 26.

  The filter 22 filters each partial color region (image thereof), and can be exemplified by a low-pass filter, for example.

  The cut-off frequency calculation unit 24 calculates the cut-off frequency of the filter 22 based on the visual characteristic information from the observation distance information, the product color pattern repetition frequency, and the contrast information, and supplies the calculated cut-off frequency to the filter 22. It is to set.

  The filtering unit 26 outputs mixed colors by filtering each partial color region using the filter 22 in which the cutoff frequency is calculated.

  Next, the operation of the representative color determination device 10 including the representative color calculation unit 20 illustrated in FIG. 7 will be described with reference to the flowchart illustrated in FIG.

  Steps S1 to S4 are as described above.

  The cut-off frequency calculation unit 24 calculates the cut-off frequency of the filter 22 based on the visual characteristic information from the observation distance information, the product color pattern repetition frequency, and the contrast information, and supplies the calculated cut-off frequency to the filter 22. Set (step S7).

The cutoff frequency calculation unit 24, for example, the difference between the position corresponding to the information on the observation distance and the position of the boundary between the area where the observer can distinguish the color pattern included in each partial color area and the area where the pattern cannot be distinguished. Accordingly, the cutoff frequency of the filter 22 is calculated, and the calculated cutoff frequency is set in the filter 22.
The cutoff frequency calculation unit 24 increases the cutoff frequency of the filter 22 as the difference between the position corresponding to the observation distance information and the boundary becomes smaller, and the difference between the position corresponding to the observation distance information and the boundary. The larger the becomes, the lower the cutoff frequency of the filter 22 is.

When the cutoff frequency is set in the filter 22, the filtering unit 26 calculates a mixed color by filtering each partial color region using the filter 22 in which the cutoff frequency is set, and the calculated mixed color is calculated. A representative color is output (step S8).
For example, if the color pattern of the partial color region is a blue stripe with a red stripe, the ground blue and the stripe red are mixed according to the cutoff frequency of the filter 22 and the mixing ratio is It gradually becomes mauve as it grows larger.

  In this way, mixing is performed according to the difference between the position corresponding to the observation distance information and the position of the boundary between the area where the observer can distinguish the color pattern included in each partial color area and the area where the pattern cannot be distinguished. By changing the color mixing ratio, it is possible to calculate a mixed color having a mixing ratio corresponding to the observation distance.

  In the case of a low-pass filter, the filter 22 cuts off a component on the higher frequency side than the cut-off frequency. Therefore, the higher the cut-off frequency of the filter 22, the smaller the components on the high-frequency side that are cut off, and the smaller the blur (mixing ratio of the mixed colors) of the partial color region after filtering. In this case, the higher the cutoff frequency of the filter 22, the smaller the difference between the position corresponding to the observation distance information and the boundary. Therefore, the position corresponding to the observation distance information means that the higher the cutoff frequency of the filter 22 is, the closer the observer is to the area where the color pattern included in each partial color area can be distinguished.

  Conversely, the lower the cut-off frequency of the filter 22, the more high-frequency components that are cut off, and the greater the blur (mixing ratio of the mixed colors) of the partial color region after filtering. In this case, the lower the cutoff frequency of the filter 22, the greater the difference between the position corresponding to the observation distance information and the boundary. Therefore, the position corresponding to the information on the observation distance means that the lower the cutoff frequency of the filter 22, the farther the observer is from the area where the color pattern included in each partial color area can be distinguished.

  In other words, the representative color calculation unit 20 includes the position corresponding to the observation distance information in the region where the observer can discriminate the color pattern included in each partial color region according to the cutoff frequency of the filter 22. It can be determined whether or not.

  On the other hand, the representative color calculation unit 20 is included in each partial color region when the position corresponding to the observation distance information is included in a region where the observer can distinguish the color pattern included in each partial color region. One of the two or more colors is selected, and the selected color is set as the representative color of the corresponding partial color area. In this case, for example, the representative color calculation unit 20 can select a color having the maximum area among two or more colors included in each partial color region as the representative color of each partial color region.

  As described above, the representative color determination device 10 calculates the representative color of each partial color region of the product having a color pattern in accordance with the observation distance information. Therefore, when the purchaser of the product looks at the image of the product displayed on a display device such as a PC to which the representative color determination device 10 is applied, the color of the product when the observer sees from a predetermined observation distance. It is possible to determine whether or not to purchase the product by reproducing the state close to the actual use scene of the product before purchasing the product. It can also be used for coordination, etc., using the difference in the appearance of the product according to the observation distance.

  The representative color determination method of the present invention can be realized, for example, by a program for causing a computer to execute each step. Further, the program can be provided by being recorded on a computer-readable recording medium.

  The representative color determination device according to the present invention is not only used when a purchaser views a product image displayed on a display device such as a PC when purchasing a product by electronic commerce using a home PC or the like. For example, when a purchaser goes to a store that sells products, the purchaser uses the storefront terminal, or the store clerk uses the customer service terminal, and the product displayed on the display device of those terminals It can also be used when viewing images.

The present invention is basically as described above.
Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and it is needless to say that various improvements and modifications may be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Representative color determination apparatus 12 Observation distance information input part 14 Product information storage part 16 Partial color acquisition part 18 Visual characteristic information storage part 20 Representative color calculation part 22 Filter 24 Cutoff frequency calculation part 26 Filtering part

Claims (22)

An observation distance information input unit for inputting information of an observation distance representing a distance from the observer to the product;
A product information storage unit for storing information on the product image, and the repetition frequency and contrast of the color pattern of the product extracted from the product image;
A partial color acquisition unit that divides the product region included in the product image into a plurality of partial color regions and acquires information on colors included in each of the partial color regions;
A visual characteristic information storage unit that stores information on the relationship between spatial frequency and contrast as information on human visual characteristics,
Based on the information on the visual characteristics, the position corresponding to the information on the observation distance from the information on the observation distance, the color pattern repetition frequency and the information on the product, and the observer can set each partial color region. It is determined whether or not the color pattern included in the image is included in the distinguishable region, and according to the determination result, information on the color of each partial color region is determined from the color information included in each partial color region. A representative color determining apparatus comprising: a representative color calculating unit that calculates a representative color.   The representative color calculation unit obtains the spatial frequency of each partial color region from the information on the observation distance and the information on the repetition frequency of the color pattern of the product, the obtained spatial frequency, and the product From the contrast information, based on the visual characteristic information, the position corresponding to the observation distance information is included in an area where the observer can distinguish the color pattern included in each of the partial color areas. The representative color determining apparatus according to claim 1, wherein the representative color determining apparatus determines whether the   When the position corresponding to the information on the observation distance is included in an area where the observer cannot distinguish the color pattern included in each of the partial color areas, the representative color calculating unit The representative color determining apparatus according to claim 1, wherein a mixed color obtained by mixing the included colors is calculated, and the calculated mixed color is determined as a representative color of each of the partial color regions.   The representative color calculation unit calculates the mixed color by performing a weighted average of the two or more colors according to a ratio of the areas of two or more colors included in each of the partial color regions. 4. The representative color determining device according to 3. The representative color calculation unit
A filter for filtering each of the partial color regions;
A cutoff frequency of the filter is calculated based on the visual characteristic information from the observation distance information, the color pattern repetition frequency and the contrast information of the product, and the calculated cutoff frequency is set in the filter. A frequency calculator;
The representative color determination apparatus according to claim 3, further comprising: a filtering unit that outputs the mixed color by performing filtering of each of the partial color regions using a filter in which the cutoff frequency is set.   The cut-off frequency calculation unit includes a position corresponding to the observation distance information, and a position of a boundary between an area where the observer can distinguish a color pattern included in each partial color area and an area where the pattern cannot be distinguished. The representative color determination apparatus according to claim 5, wherein a cutoff frequency of the filter is calculated according to the difference.   The representative of claim 6, wherein the cutoff frequency calculating unit increases the cutoff frequency of the filter as the difference becomes smaller, and lowers the cutoff frequency of the filter as the difference becomes larger. Color determination device.   The representative color calculation unit includes a position corresponding to the observation distance information in an area where the observer can discriminate a color pattern included in each of the partial color areas according to the cutoff frequency of the filter. The representative color determining apparatus according to claim 6 or 7, wherein the representative color determining apparatus is configured to determine whether the image is present.   When the position corresponding to the information on the observation distance is included in an area where the observer can discriminate a color pattern included in each of the partial color areas, the representative color calculation unit includes each of the partial color areas. 2. The representative color determining apparatus according to claim 1, wherein one of two or more included colors is selected, and the selected color is determined as a representative color of each of the partial color regions.   The said representative color calculation part selects the color with the largest area among two or more colors contained in each said partial color area as a representative color of each said partial color area. Representative color determination device. Receiving observation distance information representing the distance from the observer to the product;
Dividing the product region included in the product image into a plurality of partial color regions, and obtaining information on colors included in each of the partial color regions;
Obtaining information on the product image, and the repetition frequency and contrast of the color pattern of the product extracted from the product image;
Obtaining information on the relationship between spatial frequency and contrast as information on human visual characteristics;
Based on the information on the visual characteristics, the position corresponding to the information on the observation distance from the information on the observation distance, the color pattern repetition frequency and the information on the product, and the observer can set each partial color region. It is determined whether or not the color pattern included in the image is included in the distinguishable region, and according to the determination result, information on the color of each partial color region is determined from the color information included in each partial color region. And a step of calculating a representative color.   The spatial frequency of each partial color region is obtained from the information on the observation distance and the information on the repetition frequency of the color pattern of the product, and the visual frequency is obtained from the obtained spatial frequency and the information on the contrast of the product. A position corresponding to the observation distance information is determined based on the characteristic information to determine whether or not the observer includes a color pattern included in each of the partial color areas. Item 12. The representative color determination method according to Item 11.   When the position corresponding to the information on the observation distance is included in an area in which the observer cannot distinguish the color pattern included in each of the partial color areas, a mixture in which colors included in each of the partial color areas are mixed The representative color determination method according to claim 11 or 12, wherein a color is calculated, and the calculated mixed color is determined as a representative color of each of the partial color regions.   The representative color determination method according to claim 13, wherein the mixed color is calculated by performing a weighted average of the two or more colors according to a ratio of areas of two or more colors included in each of the partial color regions. Information of the viewing distance, the step of repeating frequency and contrast information of the colors and patterns of the product, based on the information of the visual characteristics, to calculate the cutoff frequency of the filter, to set the cut-off frequency which is the calculated to the filter When,
The representative color determination method according to claim 13, further comprising: outputting the mixed color by performing filtering of each partial color region using a filter in which the cutoff frequency is set.   The filter according to a difference between a position corresponding to the information of the observation distance and a position of a boundary between an area where the observer can distinguish a color pattern included in each of the partial color areas and an area where the pattern cannot be distinguished The representative color determination method according to claim 15, wherein the cut-off frequency is calculated.   The representative color determination method according to claim 16, wherein the cut-off frequency of the filter is increased as the difference becomes smaller, and the cut-off frequency of the filter is lowered as the difference becomes larger.   According to the cutoff frequency of the filter, it is determined whether or not the position corresponding to the information on the observation distance is included in an area where the observer can discriminate a color pattern included in each of the partial color areas. The representative color determination method according to claim 16 or 17.   The position corresponding to the information on the observation distance is included in each of the partial color regions when the observer includes the color pattern included in each of the partial color regions in the region that can be distinguished from the region that cannot be distinguished. The representative color determination method according to claim 11, wherein one of two or more colors is selected, and the selected color is determined as a representative color of each of the partial color regions.   The representative color determination method according to claim 19, wherein a color having the maximum area is selected from two or more colors included in each partial color region as a representative color of each partial color region.   The program for making a computer perform each step of the representative color determination method of any one of Claims 11-20.   A computer-readable recording medium in which a program for causing a computer to execute each step of the representative color determination method according to any one of claims 11 to 20 is recorded.