JP2745604B2 - Color image converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention calculates a psychological image of a color image, displays the image in a psychological display language to an operator, and responds to a psychological image conversion request from the operator. The present invention relates to an apparatus for performing color conversion.

(Prior art) One of the methods of expressing colors within a range that can be seen by human eyes is as follows.
A Munsell color system expressed by three attributes of lightness (V), saturation (C), and hue (H) is known. Although this color system is a physical scale, you can objectively grasp the color,
It had nothing to do with the psychological image that people felt about color.

Therefore, a colorimetric method called a color image scale has been proposed as a method for expressing a psychological image of color (Japanese Patent Publication No. Sho 56-46082). This color image
The scale analyzes the unique image of each color psychologically, arranges the colors using the degree of the image as a scale, and expresses the color and the psychological display language in a psychological coordinate system as shown in FIGS. 6 and 7. With this arrangement, colors and psychological languages are associated with each other, and equivalent conversion between them can be performed.

However, a specific device for displaying the entire color image in one psychological display language or converting the image into an image specified in the psychological display language has not yet been realized.

In addition, a histogram of the frequency of occurrence of colors in a color image is created, the color space is divided into a plurality of regions using the histogram, and the regions are successively integrated in the order of a predetermined frequency, so that a small number of input images can be obtained. There is known a color image conversion apparatus for converting a color image into a color image composed of various colors (Japanese Patent Laid-Open No.
No. 05276). Since this known color image conversion device integrates adjacent areas based on a certain standard,
The resolution of the converted image is lower than that of the input image, and it is inevitable that the image deteriorates.

In any case, there has not yet been provided an image conversion device capable of converting a color natural image according to an image psychologically intended by an operator without deteriorating its image quality.

(Problems to be Solved by the Invention) According to the present invention, when an operator instructs psychological image conversion of a color image in a psychological display language, a certain color image is converted into a color image of a psychological image designated by the operator. It is an object of the present invention to provide a color image conversion device capable of easily converting without deteriorating the color image.

Another object of the present invention is to provide a color image psychological language display device capable of displaying a psychological image of a color image on a display device in a psychological display language by analyzing the color image.

A further object of the present invention is to provide a color image conversion and display device having an excellent man-machine interface that can be handled by anyone without requiring any skill in operation.

(Means for Solving the Problems) First Invention A first invention of the present invention relates to an image memory 2 for storing an input or color-converted color image, and an image memory 2 for storing a color image.
A histogram creating means 3 for classifying each pixel of the image read out from a predetermined number of divided areas, obtaining and storing a representative color and an occurrence frequency for each divided area, and a color described later from the representative colors of the histogram creating means 3 The color coordinate selecting means 4 for selecting a color arrangement arranged in the coordinate memory 91 includes: a divided area storing means 5 for storing a color coordinate number selected according to the representative color of the histogram in association with a pixel; A frequency counting memory 6 for storing the frequency for each color coordinate number selected by the color coordinate selecting means 4, and a color coordinate memory 91 in which a large number of color arrangements are arranged in advance on psychological coordinate axes associated with hue and tone. And a psychological coordinate memory 9 having a psychological language coordinate memory 92 in which a number of psychological display languages are arranged in advance on the psychological coordinate axis, and a psychological display language according to a response from the operator. To select a psychological language selection means 10
An optimum histogram calculation means 11 for calculating an optimum histogram that best matches the psychological display language from a psychological coordinate memory based on a psychological display language selection request from the operator; a histogram stored in the frequency counting memory 6 and an optimum histogram calculation Color conversion means for converting the color data in the image memory by comparing the optimal histogram generated by the means 11
12 is a color image conversion device that includes an image display unit 13 that appropriately displays the contents of an image memory before and after color conversion, and performs color conversion of a color image in response to a psychological image conversion request from an operator.

Second invention A second invention is directed to an image memory 2 for storing a color image.
A histogram creating means 3 for classifying each pixel of the image read out from the image memory 2 into a predetermined number of divided areas, obtaining a representative color and an occurrence frequency for each divided area, and storing them; Color coordinate selecting means 4 for selecting a color arrangement arranged in a color coordinate memory 91 to be described later from the representative colors
A frequency counting memory 6 for storing the frequency of occurrence of the histogram in the number of the color coordinate selected by the color coordinate selecting means 4, and a plurality of color arrangements arranged in advance on psychological coordinate axes associated with hue and tone. A psychological coordinate memory 9 including a color coordinate memory 91 and a psychological language coordinate memory 92 in which a number of psychological display languages are arranged on the psychological coordinate axes in advance;
Psychological language calculation means 7 for calculating and selecting a psychological display language corresponding to an image from the psychological coordinate memory 9 based on the histogram information for each color coordinate stored in the frequency counting memory 6, and displaying the calculation and selection result of the psychological language And a psychological language display device 8 for displaying a psychological image corresponding to the input image to the operator in a language.

Third invention A third invention has a configuration in which the configuration of the first invention and the configuration of the second invention are combined, calculates a mental image corresponding to an input image, displays the image to an operator, and performs an operation. This is a color image conversion and psychological language display device that performs color conversion of an input image in response to a psychological image conversion request from a user.

(Operation) The operation of the first invention The histogram creating means 3 repeatedly executes area determination, frequency counting, area integration, determination and storage of the representative color of each pixel of the input image, and performs a predetermined number of divisions in advance. After the area is determined, the area to which each pixel belongs is notified to the color coordinate selecting means 4 by a representative color number. On the other hand, the representative color and its frequency at the time of determining the divided area are stored in the histogram creating means 3.

The color coordinate selecting means 4 first reads the representative color and the corresponding frequency information in the histogram creating means 3, further searches the coloration data, and stores the coloration data number corresponding to one representative color as a frequency value in a frequency counting memory. Send to 6. In the frequency counting memory 6, a predetermined number of correspondences between coloration data numbers and frequency values are set.

After that, the color coordinate selecting means 4 outputs the histogram creating means 3
Is converted into a coloration data number based on the correspondence with the previously obtained coloration data number and transmitted to the divided area storage means 5. Divided area storage means 5
The color arrangement data numbers are stored in the same pixel array as in the input image memory 21.

When there is an instruction of color conversion by the psychological display language from the operator, the psychological language selection means 10 searches the psychological language coordinate memory 92 and reads out the coordinate value of the psychological display language corresponding to the instruction of the operator.

The optimum histogram calculation means 11 calculates an optimum histogram that best matches the coordinate value of the psychological language.

The color conversion means 12 converts the color data in the image memory by associating the high frequency areas in the optimum histogram obtained by the optimum histogram calculation means 11 in order from the high frequency area in the histogram of the input image. Write to 22.

The image display means 13 appropriately displays the contents of the image memory before and after the color conversion.

As described above, according to the present invention, it is possible to automatically perform color conversion of an input image simply by instructing a psychological display language at an image level associated with a human from an operator. There is no need to perform complicated adjustments using RGB signals or CMY signals, and an advanced man-machine interface can be realized by using the present invention in various color image generation and conversion systems.

Operation of the Second Invention The functions of the histogram creating means 3, the color coordinate selection means 4, the divided area storage means 5, and the frequency counting memory 6 are the same as those described for the operation of the first invention, and will not be described. Omitted.

The psychological language calculation means 7 searches the color coordinate memory 91 based on the area number from the frequency counting memory 6 (this indicates the color number in the color memory 90), and obtains the psychological coordinates of each corresponding color. Then, a coordinate value representing the input image is determined by calculating a load average using the frequency value as a load. Then, the coordinate values of each psychological display language are read out from the psychological language coordinate memory 92, each distance from the coordinate value representing the input image is calculated, and the psychological display language having the smallest distance is selected, and the psychological language display means 8 is selected. Display by

According to the present invention, since the image of the color tone of the image can be displayed in a psychological display language, the image of the image can be easily and objectively confirmed by anyone in various color image generation and conversion systems, Therefore, it is not necessary for the operator to have a high level of skill to grasp the image of the image, and an excellent man-machine interface can be realized.

Operation of the Third Invention The third invention can provide an operation having both the operation of the first invention and the operation of the second invention. Further, according to the third aspect, the input image or the image after the color conversion stored in the image memory is displayed by the image display means 13 and the psychological image of those images is displayed in the language by the psychological language display means 8. Since the image can be color-converted in response to a psychological image conversion request in a psychological display language, the operator can check the input image, the converted image, and the psychological evaluation of these images on the display unit. By performing image conversion operations,
Fine color adjustment can be easily performed, and a more excellent man-machine interface can be realized.

(Embodiment) FIG. 1 is an overall configuration diagram showing a schematic configuration of an embodiment corresponding to the third invention in the present invention. FIG. 2 and FIG. 3 are diagrams showing the operation flow.

In FIG. 1, an input device 1 is a device for inputting a color image, and specifically, a color image input device for optically reading an original image and obtaining image data, such as a color television camera or a color image scanner, or a color image input device. An image storage device such as a magnetic disk that stores image data read by the image input device. Each pixel of the image data output from the input device 1 is composed of M-bit R, G, and B components.

The image memory 2 has an input image memory 21 for storing input image data from the input device 1 and a converted image memory 22 for storing a converted image described later.

The image display device 13 displays input image data or converted image data stored in the image memory 2.

The histogram creating means 3 creates an input histogram by sequentially reading the pixel values of the image data stored in the input image memory 21 and counting the frequency of occurrence of colors, that is, the number of pixels having each color for each of a predetermined number of regions. Things.

The histogram creating means 3 comprises an area determining means 31, a frequency counting means 32, an area dividing means 33, and a representative color memory 34, and a predetermined number of representative colors and an input assigned to the representative colors in the procedure shown in FIG. Obtain a pixel frequency count.

Specifically, IEICE Transactions '87 / 4 VOL.J70
-D NO.4 High speed algorithm for limited color display described in pp.720-726 can be applied.

Now, assuming that M = 8, an input image of 8 bits for each of R, G and B colors is 2 ⁸ = 25
Describe the case of dividing into 6 areas. (See Steps 1 to 6 in FIG. 6) Step 1 (initial division): A division area is set for each of the upper 5 bits of the R, G, and B 8 bits. The region determination means 31 is R,
G and B spaces are equally divided into a 5 × 5 × 5 cubic region P _j (j = 1,
..., it is determined whether belonging to the 2 ¹⁵⁾ throat area.

Step 2 (frequency counting): A three-dimensional histogram of input pixels belonging to the divided area of step 1 is created. Frequency counting unit 32 counts the pixels belonging to it for each P _j, a histogram C _pj in two ¹⁵ division.

Step 3 (region integration): The RGB color space is divided into four for each axis, and the whole is uniformly divided into ²⁶ divided regions. For a region judging means 31 P _j is 2 ^six divided areas S _j in Step 1,
It is determined to which region it belongs.

Step 4 (frequency counting): The count value C _pj at P _j at step 1 is integrated with S _j at step 3. Frequency counting means 3
2 calculates the _count value _Csj by the following equation.

Step 5: _{Find the} axis with the largest variance for each area S _j ,
The regions are divided into two in the descending order of the weighted variance.

The region dividing means 33 _calculates S _j from P _j included therein.
Axis with maximum variance for R, G, B and its axis variance σ _j ²
And ask. Sigma _j frequency C _sj and variance values included in the area S _j
² weighted variance C _sj sigma _j ² based on listing in descending order for each of the regions, to 2 minutes the area with the average value of the dispersion up shaft to the upper 2 ^five regions.

S _j of this case 2 ⁶ region changes to S _j '2 ⁶ +2 ⁵ region. After executing step 5, step 4 is executed again for S _j ′, and the process is repeated until the number of regions finally divided in step 5 reaches a predetermined number of 256.

In this case, steps 4 and 5 are repeated six times.

Step 6 (representative color writing): A representative color is set for the 256 regions finally obtained. After dividing the predetermined number of 256 areas, the area dividing means 33 sets each area S _li (i = 1,
... 256) sequentially stores the representative color memory 34 the mean value _{i, i, i} of each pixel value in.

By the above operation, a predetermined number of 256 pieces of frequency data W _i (in descending order) and representative color data _{i 1} , _{i 2} , _{i 3} are stored in the frequency counting means 32 and the representative color memory 34 in the histogram creating means 3. These correspondences are as shown in FIG. The histogram creating means detects, via the area determining means 31 and the representative color memory 34, where each pixel of the input image is classified in each of the finally divided areas, and displays the representative color data to which each input pixel belongs. To the color coordinate selection means 4. The color coordinate selection means 4 reads the representative color data _{i 1} , _{i 2} , _i and the frequency data W _i formed in the histogram creation means 3 already shown in FIG. 2, and furthermore, a color arrangement memory 90 in a psychological coordinate memory described later. Color data R _mi , G _mi , B mapped to
Search _mi and for representative colors _i , _i , _i But it sends a minimum become color data number m _i to the frequency counting memory 6 in the frequency W _i and set himself is to create a corresponding table of representative color data → color data number. (FIG. 8) After that, the color coordinate selection means 4 sets the histogram creation means 3
The representative color data of each image output from is converted into a coloration data number by the correspondence table shown in FIG. 8 and transmitted to the divided area storage means.

Divided region storage unit 5 has a divided area memory having an address corresponding to the address of the input image memory 21, color data number based on the address of the input image memory 21 is sent from the color coordinate selection means 4 m _i Is stored in the divided area memory. That is, the divided region memory color data number m _i of each pixel at the address position corresponding to each pixel stored in the input image memory 21 is stored. FIG. 3 schematically shows the input image memory and the divided area memory. Each of the address positions of 3 M bits of the input image memory, in this case, 8 × 3 = 24 bits, is M bits (8 bits). , G, and B image values are stored, and correspondingly, N bits (8 bits in this case) are stored in each address position of the divided area memory.
Is stored.

The area number data stored in the divided area memory is referred to when the contents of the input image memory 21 are converted by the color conversion means 12 described later.

Representative of the input image psycholinguistic calculating means 7 count (frequency values) sent from the frequency count memory 6 W _i, based on the color data number m _i with reference to the color coordinate memory 91 in psychological coordinate memory 9 A psychological coordinate value to be calculated is calculated, and then a psychological language that is optimal for the psychological coordinate value is selected with reference to the psychological language coordinate memory 92 and transmitted to the psychological language display means 8.

The psychological coordinate memory 9 conducts a color image survey on the impression of each color from the viewpoint of hue and hue, that is, a psychological effect, and performs a factor analysis based on the survey data. Then, a P-dimensional space is created by using the basic image as a scale, colors are psychologically differentiated from each other, individual colors are positioned, and a new psychological three-dimensional space is created.

This psychological coordinate memory 9 is a color coordinate memory for storing a color coordinate map in which the relationship between the color and the basic image scale is mapped.
Psychological language coordinate memory 9 that stores a psychological language coordinate map that maps 91 and the psychological display language to the same basic image scale
2, and a color arrangement memory 90 representing the color data of the mapped color arrangement. In this embodiment, a color coordinate map and a psycho-linguistic coordinate map which are publicly known from Japanese Patent Publication No. 56-46082 having P = 2, that is, two basic image scales, are used.

The color coordinate map is a basic image of ^2N colors (see FIG. 9) whose R, G, and B values are defined in the color arrangement memory 90, as shown in FIG. A warm-coll axis representing the degree of a certain warmness (warm warm) and a cool degree (cool cool), and a soft-hard (soft-hard) representing the degree of softness and softness. This is a map plotted on two axes -hard).

On the other hand, the psychological language coordinate map is a map of q psychological display languages selected in advance on the same basic image scale as the color coordinate map, as shown in FIG.

By using these maps in combination, equivalent conversion from a color to a psychological display language or from a psychological display language to a color can be performed.

The psychological language calculation means 7 first refers to the color coordinate memory 91 using the coloration data number m _i and the frequency W _i read from the frequency counting memory 6, and calculates the coordinate values on the basic image scale representing the input image by the formula ( It is determined by performing the calculation of 3).

That is, in order to select the 256 color data numbers m _i (i = 1,..., 256) written in the frequency counting memory 6 from the 2 ^N color maps mapped to the color memory 90 and the color coordinate memory 91. coordinate values X searches the color coordinate memory 91, corresponding to the area number i in a color coordinate map corresponding to the color data number m _i
Mi , Y _Mi (X represents the coordinate value of the warm-cool axis, Y represents the coordinate value of the soft-hard axis), and then the coordinate values X, Y representing the input image
To Is determined by the calculation of

Next, the psycholinguistic operation means 7 stores the coordinate values X and Y determined by the operation of the equation (3) in this way into the psycholinguistic coordinate memory 9.
2 The coordinate values a _j , b of the q psychological display languages
_j (where a _j and b _j are the j-th psychological display language warm-cool
Axis, representing the coordinate value on the soft-hard axis).
Select the psychological display language with the shortest distance. That is,
The optimum psychological display language for the input image is obtained by the calculation of the following equation (4).

The psychological display language f (X, Y) representing the input image determined in this way is displayed by the psychological language display means 8 and presented to the operator.

The operator compares the input image displayed on the image display means 13 with the psychological display language displayed on the psychological language display means 8 and examines whether or not to convert the input image. Of the psychological display language in the psychological language coordinate map and request conversion. When expressed in the psychological display language arranged in the psycholinguistic coordinate map shown in FIG. 5, the process requests, for example, to convert an input image of a “natural” image into an image of a “thick” image. is there.

The psychological language selecting means 10 outputs the coordinate values a and b on the corresponding basic image scale according to the psychological display language of the image conversion request instructed by the operator in this way. More specifically, the operation is performed by searching the psychological language coordinate memory 92 using the psychological display language requested by the operator as a number, extracting coordinate values registered there, and calculating the optimum histogram calculation means.
Send to 11.

The optimum histogram calculation means 11 is a 256-color coordinate value X _i , Y _i selected from the frequency value W _i stored in the frequency counting memory 6 and the 2 ^N color data read out from the color coordinate memory 91. Approximate approximate coordinates that best approximate the psychological language coordinate values corresponding to the conversion request image from the psychological language selection means 10 based on Frequency value W _i and color coordinate value (W _ti , Y
by obtaining a combination of _ti), and requests a corresponding relationship to convert the color of the color numbers m _i to the color of the color numbers t _i.

To convert Hisutoraguramu the operator a histogram of the input image is adapted to the psychological display language has been specified, the order having a high frequency value W _i of the input image in this embodiment, more important representative colors for the specified color conversion (I.e., in ascending order of the distance between the coordinate value and the coordinate value of the representative color in the color coordinate memory).

Therefore, the optimum histogram calculation means 11 executes the following operation.

The distance d _i between the coordinate values X _i , Y _{i of the} ^2N colors arranged in the color coordinate memory 91 and the coordinate values of the psychological display language of the conversion request instruction from the psychological language selecting means 10 is calculated by the following equation. .

The distance d calculated in the step of the coordinate values X _i , Y _i
rearranged in ascending order of _i Coordinates X _i ', Y _i' rearranges in descending order, obtaining the coordinate values X _ti Y _ti are denoted by the color number t _i corresponding to each thereto.
Here, t _i represents the color arrangement data numbers arranged in ascending order of d _i .

Descending frequency W _i created by frequency counting memory 6
Is stored in association with ti.

Color data number m _i stored in the frequency count memory 6
The region number ascending all i (i.e., the frequency W _i is larger region sequence) read, create the corresponding m _i → t _i as FIG. 10, and transmits the color conversion unit 12.

The color conversion means 12 has a color conversion coefficient memory which previously stores ^2N pairs of color conversion coefficient sets A _{l, l} ′ having (l, l ′) as a two-dimensional address.

The coefficient set A _{l, l} satisfies the following equation.

The color conversion means 12 first uses the signal (m _i , t _i ) representing the correspondence between the color arrangement data numbers _mi and t _i sent from the optimum histogram calculation means 11 as an address to obtain 256 bits from the color conversion coefficient memory.
A pair of coefficient sets A _{mi, ti} are selectively read.

Therefore, the pixel data (r, g, b) of the input image is sequentially read from the input image memory 21 and the divided area storage means 5 is read.
Sequentially reading the divided color data number m _i corresponding to the pixel from. Then, converted pixel data (r ′, g ′, b ′) is generated by multiplying the read pixel data (r, g, b) by the color conversion coefficient A _{mi, ti} as shown in the following equation. I do.

The converted image data is written to the converted image memory 22 and displayed by the image display means 13.

In this embodiment, the signal read from the image memory is RG
Although described as a B signal, other color space signals L ^* a ^*
b ^* , L ^* u ^* v ^* , Munsell HVC, etc. can be handled similarly.

Further, in the present embodiment, two basic image axes in the psychological coordinate memory 9 are used. However, if more accurate conversion is required, more axes may be provided.

Further, in the present embodiment, the histogram creating means 3 is the above method, but other MCA (Mediam Cut Algorithm), B
An individual method such as a method using a D-tree can be used. The predetermined number of divisions is not limited to 256, and the number of divisions can be further reduced when high speed is required.

In addition, the present embodiment may be realized by hardware or software.

(Effect of the Invention) According to the color image conversion device of the present invention, it is possible to automatically perform color conversion of an input image simply by instructing a psychological display language at an image level associated with a human from an operator,
Therefore, the operator does not need to make complicated adjustments using the rgb signal and the CMY signal unlike the prior art, and realizes an advanced man-machine interface by using the present invention in various color image generation and conversion systems. Can be.
Further, according to the present invention, the representative color is determined based on the frequency count, and the processing according to the input image is performed. Therefore, the accuracy of the conversion is increased, and therefore the accuracy is reduced even if the number of the representative colors is reduced. Can be kept.

In addition, according to the color image psychological language display device of the present invention, since the image of the color tone of the image can be displayed in the psychological display language, the image of the image can be objectively and to whom in various color image generation and conversion systems. However, it can be easily checked, so that the operator is not required to have a high level of skill to grasp the image of the image.
An excellent My Machine interface can be realized.

Further, according to the color image conversion / psychological language display device of the present invention in which the psychological language display device and the color image conversion device are combined, the input image stored in the image memory or the image after the color conversion is displayed on the image display means 13. And the psychological image of those images is displayed in a psycholinguistic display means 8.
Can be displayed in a language, and the color of the image can be converted in response to a psychological image conversion request in the psychological display language. Therefore, the operator can display the input image, the converted image, and the psychological evaluation of these images on the display means. By performing the image conversion operation while confirming, the fine adjustment of the color can be easily performed, and a more excellent man-machine interface can be realized.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a schematic configuration of an embodiment of the present invention. FIG. 2 is a diagram showing a histogram of the present invention in a table. FIGS. 3 (a) and 3 (b) are diagrams showing a configuration of storage of an image memory and a divided area memory, respectively. FIG. 4 is a diagram showing a color coordinate map in which ^2N colors used as color schemes are plotted on two axes of a basic image, a warm-cool axis and a soft-hard axis. is there. FIG. 5 is a diagram showing an example of a psychological language coordinate map in which q psychological display languages selected in advance are mapped on the same basic image scale as the color coordinate map. FIG. 6 is a flowchart showing a processing procedure in the histogram creating means. FIG. 7 is a diagram showing a configuration of storage of a frequency counting memory. FIG. 8 is a diagram showing a correspondence table formed in the color coordinate selecting means. FIG. 9 is a diagram showing a configuration of a color arrangement memory in a psychological coordinate memory. FIG. 10 is a diagram showing the correspondence of the color arrangement numbers after image conversion transmitted from the optimum histogram calculation means to the color conversion means. 1 image input device, 2 image memory, 3 histogram creation means, 4 color coordinate selection means, 5 divided area storage means, 6 frequency counting means, 7 language processing means , 8…
… Psychological language display means, 9… psychological coordinate memory, 10… psychological language selection means, 11… optimal histogram calculation means, 12…
Color conversion means, 13 ... Image display means.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisae Goto 2274 Hongo, Ebina-shi, Kanagawa Prefecture Fuji Xerox Co., Ltd. Ebina Office (56) References JP-A-1-318173 (JP, A) JP-A-62- 105276 (JP, A) JP-B 56-46082 (JP, B1)

Claims (3)

(57) [Claims] An image memory for storing an input image or an image after color conversion, each pixel of an image read from the image memory is classified into a predetermined number of divided areas, and a representative color and an occurrence frequency for each divided area are classified. A histogram coordinate generating means for calculating and storing a color coordinate, a color coordinate selecting means for selecting a color arrangement arranged in a color coordinate memory described later from representative colors of the histogram generating means, and a color coordinate number selected according to the representative color of the histogram Divided area storage means for storing the frequency of occurrence of the histogram for each color coordinate number selected by the color coordinate selection means, and a large number of color schemes in advance of the hue and tone. A color coordinate memory arranged on a psychological coordinate axis associated with, and a psychological language coordinate having a number of psychological display languages previously arranged on the psychological coordinate axis A psychological coordinate memory provided with a memory, a psychological language selecting means for selecting a psychological display language according to a response from the operator, and a psychological display language that is most suitable from the psychological coordinate memory based on a psychological display language selection request from the operator An optimum histogram calculating means for calculating an optimum histogram; a color converting means for converting color data in the image memory by comparing the frequency counting memory with the optimum histogram; and appropriately displaying contents of the image memory before and after the color conversion. A color image conversion device, comprising: image display means; and performing color conversion of an image in response to a psychological image conversion request from an operator. 2. An image memory for storing a color image, and a histogram generation for classifying each pixel of the image read out from the image memory into a predetermined number of divided areas and calculating and storing a representative color occurrence frequency for each divided area Means, a color coordinate selecting means for selecting a color arrangement arranged in a color coordinate memory described later from the representative colors of the histogram creating means, and a frequency of occurrence of the histogram for each color coordinate number selected by the color coordinate selecting means. A frequency counting memory for storing, a color coordinate memory in which a large number of color schemes are previously arranged on psychological coordinate axes associated with hue and tone, and a psychological language in which a large number of psychological display languages are previously arranged on the psychological coordinate axis A psychological coordinate memory having a coordinate memory; and an image from the psychological coordinate memory based on histogram information for each color coordinate stored in the frequency counting memory. And a psychological language calculation means for calculating and selecting a psychological display language corresponding to the above, and a psychological language display means for displaying the psychological language calculation result, wherein a psychological image of a color image is displayed to the operator in the psychological display language. A color image psychological language display device characterized by the following. 3. An image memory for storing an input image or an image after color conversion, and each pixel of the image read from the image memory is classified into a separation area including a predetermined representative color.
Histogram generating means for obtaining and storing the occurrence frequency; color coordinate selecting means for selecting a color arrangement arranged in a color coordinate memory to be described later from representative colors of the histogram generating means; color coordinates selected according to the representative colors of the histogram Divided region storing means for storing the numbers of the colors in association with the pixels, a frequency counting memory for storing the frequency of occurrence of the histogram for each color coordinate number selected by the color coordinate selecting means, A color coordinate memory arranged on a psychological coordinate axis associated with the strength of the color tone, a psychological coordinate memory including a psychological language coordinate memory in which a large number of psychological display languages are arranged on the psychological coordinate axis in advance, and the frequency counting memory. Calculates and selects a psychological display language corresponding to an image from the psychological coordinate memory based on the histogram information for each color coordinate stored in Psychological language calculation means, Psychological language display means for displaying the result of the Psychological language calculation, Psychological language selection means for selecting a Psychological language according to a response from the operator, and a Psychological language selection request from the operator An optimum histogram calculating unit that calculates an optimum histogram that best matches the psychological display language from a psychological coordinate memory; a color conversion unit that converts color data in the image memory by comparing the frequency counting memory with the optimum histogram; Image display means for appropriately displaying the contents of the image memory before and after the color conversion, calculating the psychological image of the color image and displaying it to the operator in a psychological display language, and in response to a psychological image conversion request from the operator A color image conversion and psychological language display device for performing color conversion of an image.