JPH0788610B2 - Photo weaving equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic weaving apparatus which automatically creates pattern paper data required for weaving based on pattern data optically read from photographs and the like.

[0002]

2. Description of the Related Art Conventionally, for example, when a picture of a fabric woven by a jacquard loom is created based on a photograph, a printed matter, a painting, etc., a skilled engineer draws up a design drawing based on these photographs, An organization chart is created by assigning an organization to this design chart, and pattern paper data is created from this organization chart.

To draw a design drawing means that an engineer sets dozens of colors according to the color change of a photograph or the like and draws the photograph on the design paper (graph paper) using the set color. A texture chart is created by determining a finite number of textures created in advance, that is, a crossing pattern of warp threads and weft threads, corresponding to each color of the design drawing.

The preparation of such an organizational chart requires a considerable amount of skill, and there is a limit in expressing the subtle color tones of photographs.

The color of the fabric depends on the colors of warp and weft, but the number of colors that can be used is limited (for example, 8).
Since there are 10 to 10 colors), the colors of warp and weft must be selected according to the shade of the photograph. It requires a considerable amount of skill to select this color, but it takes a lot of time and cost to re-dye the warp and weft according to this color shade.

[0006]

In order to solve the problem caused by the manual work, there is an attempt to create the above-mentioned design drawing and organization chart by a computer.

Image data read by an optical scanner based on a photograph or the like is converted into an organization chart by using a dither method, which is a technique used for reproducing an intermediate color tone by a color printer or the like. Is the way to do it.

According to this dither method, it is possible to reproduce in a pseudo manner with a limited number of colors with a limited intermediate color tone. However, pattern paper data (weave data for controlling the jacquard loom) is created from the organization chart, When weaving a woven fabric, there is a problem that the color of the woven fabric surface does not match the organization chart.

This is because, unlike a color printer, a woven fabric is made up of a combination of warp and weft threads and is not flat, and for example, weft threads appearing on the surface of the woven cloth in one horizontal row. There are many colors,
When the weft thread color changes frequently, the weft threads do not line up in a line and slightly shift up and down, creating a gap between the upper and lower lines, where warp threads that do not originally appear on the surface appear. To come. The warp thread is often the same color as one of the weft threads, for example, black or white, but due to the black or white appearing in this way, the color of the woven surface differs from the image data. It ends up.

As a countermeasure against this, by using warp threads of the same color as the weft threads and by letting out some of the weft threads on the fabric surface, the amount of weft threads on the fabric surface is reduced and the weft thread color It is conceivable to reduce the switching to eliminate the vertical displacement of the weft thread and prevent the back warp thread from appearing.

However, in this case, when the warp yarns continuously appear on the surface of the woven fabric over several weft yarn lines, the warp yarns float, and the warp yarns are caught or the fabric surface is disturbed.

The present invention has been proposed in order to solve such a problem, and provides a photographic weaving device which is replaced with a part of the weft threads to prevent the warp threads coming out on the surface of the fabric from being lifted. The purpose is to

[0013]

According to the present invention, as shown in FIG. 17, means 21 for optically reading a photograph or the like as image data and an intermediate color tone is limited by the dither method based on this image data. Means 22 for creating an organization chart of a predetermined matrix that is reproduced in a pseudo manner according to the number of colors, means 23 for allocating the limited number of weft thread colors according to this organization chart, and one of the weft thread colors is selected as a warp thread color. Means 24, means 25 for comparing the number of consecutive weft thread colors of the same color as the warp thread color in each line of the weft thread allocation with a preset number of checks, and when the number of consecutive rows is less than the number of checks, the weft thread color Means 26 for correcting the weft thread assignment so as to replace warp thread color with
And means for comparing the number of consecutive warp color warp lines replaced from the weft thread color with a preset number of checks 2
7 and means 28 for correcting the weft thread allocation again so as to replace the warp thread color with the weft thread color which is the same as the warp thread color at a predetermined interval when the continuous number is greater than or equal to the check number.

[0014]

In addition to the weft yarn on the surface of the fabric, a warp yarn having the same color as a part of the weft yarn is replaced, and the amount of weft yarn on the fabric surface and the switching frequency of the weft yarn are reduced. Then, the warp yarns appearing on the surface of the fabric are held by the weft yarns so that the number of continuous warps on the warp line is less than a predetermined value by the floating prevention operation, so that the warp yarns are not lifted up and the disorder of the fabric surface can be avoided.

[0015]

EXAMPLES Examples of the present invention will be described below.

In FIG. 16, reference numeral 11 is a color scanner for optically reading a photograph or the like, and 10 is a pseudo by a small number of colors (for example, 8 colors) in which an intermediate color tone is limited by a dither method based on the image data. It is a computer that creates a texture chart to be reproduced in Fig. 1, assigns weft threads, fits a warp texture, prevents warp threads from floating, and creates pattern paper data from them.

In principle, the pattern of the image data is reproduced by reproducing the intermediate color tone by the color of the weft thread. Therefore, according to the dither method, for example, as shown in FIG. 1, a 4 × 4 matrix is used as a unit. , An array indicating the order in which the colors (dots) necessary for obtaining 16 levels of gradation are set. FIG. 2 shows an example of a pseudo intermediate tone pattern obtained by this, and shows (2), (6) and (10) in FIG.

As an example, an array obtained by converting the image data of FIG. 3 into color data of eight colors by the dither method is as shown in FIG. 4, for example. The conversion theory based on the dither method is widely used in the field of color printers and is a well-known fact, so a detailed description thereof will be omitted.

By the way, assuming that FIG. 4 is the organization chart of the woven fabric, weft threads of 8 colors are assigned to all the matrices, and the pattern paper data is created based on this, and the pattern paper data created in this way is used. When the woven fabric is woven according to the above, assuming that the image data can be ideally reproduced, the result is as shown in FIG. FIG. 5 shows the weft threads of eight colors arranged according to FIG.

However, in the woven fabric, the weft threads and the warp threads are interlaced,
The weft thread of the required color is pulled out from the back side so that only the weft thread comes out on the surface of the fabric, passes through the warp thread's front side for the specified number of lines in the warp row, and then returns to the back side. When the color weft threads are frequently switched, the different color weft threads do not line up in a straight line with respect to the weft line, but slightly shift up and down.

FIG. 6 shows this, and warp yarns that should not normally come out to the front side appear between the lines that are slightly shifted vertically, as shown by the shaded area in the figure. For example, in the eighth column in FIG. 4, from the right, white → black → white → black → yellow → white → black (however, consecutive parts of the same color are the same).
And switching is performed 6 times. Therefore, weft yarns of different colors are drawn out from the back side one after another, and the weft yarns that should be aligned in a straight line as shown in FIG. 6 are displaced, and a gap is formed between this portion and the upper and lower lines. And when black or white warp threads are visible on the surface through this gap,
The actually woven material has a color tone greatly different from that of the image data shown in the organization chart of FIG.

This is due to the fact that the color of the weft thread is frequently changed in each line and the amount of the weft thread appearing on the surface of the fabric is too large.

As a measure against this, among the weft threads that reproduce the color of the image data, the warp threads of the same color are used to replace a part of the weft threads, and the weft thread amount and the weft thread that appear on the surface of the fabric are switched. It is possible to reduce the number of lines, prevent gaps between lines, and faithfully reproduce image data. Therefore, the computer 10 replaces the warp yarns with the weft yarns, that is, fits the "warp-out design" according to the flowchart of FIG.

To explain this, in step 1, the warp thread color is set, and the warp thread color set at this time is as follows:
One of the eight weft threads is selected, but black or white, which appears the most in the organization chart, is desirable.
Hereinafter, description will be made assuming that C = black is selected as the warp thread color. In order to check the horizontal row (L line) of the organization chart in order from the bottom, set L = 1 in step 2,
The organization chart data of the L-th line is read from the organization chart of FIG. 4 (step 3).

Then, in step 4, C on the L line is
A continuous number of colors, that is, the same black color as the warp thread color is calculated, and this is compared with a preset number of checks (step 5). The value of the number of checks is obtained in advance by a weaving experiment, and the number of checks = 4 is set in this embodiment. If the number of continuous weft thread colors is less than the number of checks, apply the "vertical structure" in step 6,
Warp threads are used instead of weft threads, but when the number of checks is greater than the number of checks, fitting is not performed. For example, the black line on the first line in FIG. 4 has 6 consecutive numbers and 4 or more check numbers,
The fitting of the "tissue structure" is not performed, but the black line on the 5th line has a continuous number of 1 and 3 and is less than the check number of 4, so the "tissue structure" is applied.

The reason why the number of consecutive warp fittings is less than the check number is that the weft thread is switched more frequently when the number is less than that, and by replacing this with warp thread, the weft thread can be switched. This is because it can be prevented from being frequently performed, and when the number of checks is less than the check number, all the weft yarns of the same color as the warp yarns are prevented from being replaced by the warp yarns. The number of checks can be freely changed as needed.

By fitting "warp-out structure", one warp thread is added to the weft eight-color organization chart, so that the eight-color organization chart is formally converted into a nine-color organization chart. However, since the warp threads are actually black, eight colors are used as the fabric. In the 5th line of FIG. 4, all black portions are replaced with warp thread colors, and the organization chart of FIG.
become that way. The warp thread color is designated for the portion shown as "warp" in the drawing.

In step 7, it is confirmed whether or not the check of the L line is completed. When the check of the L line is completed, the process proceeds to step 8 to set L = L + 1, and the next line is checked through step 9 to finally Repeat the above operation until all lines have been checked.

In this manner, the fitting of the "warp-out structure" to the structure chart of FIG. 4 is completed, and the structure chart of FIG. 9 is obtained. Based on this, the "warp" portion is replaced with the weft thread. The combination of weft and warp threads will be adjusted so that the warp threads appear on the surface of the fabric.

By the above-mentioned adjustment, in FIG.
Whereas 00% was weft, in FIG. 9, 30% was warp and 70% was weft. Further, the frequency of switching the weft thread color on the same line is also reduced, and by the way, the 8th line is reduced to 3 times of white → yellow → white in FIG. 9, although it was switched 6 times in FIG.

As a result, the actual surface of the fabric becomes as shown in FIG. 10, and there is no gap between the upper and lower rows of each weft yarn, no warp yarn appears in the gap portion, and the warp yarn replaced with the weft yarn is Since it is the same as the weft color that should be placed there, the color of the fabric surface is as shown in the organization chart of FIG. 4 created based on the read image data.
It matches the ideal weave pattern shown in.

By replacing a part of the weft thread with the warp thread in this way, the image data can be reproduced faithfully. In this case, the fifth vertical line is seen from the right in FIG. As you can see, there are 6 warp thread colors in a line. When the warp threads are continuous in this way, the warp threads float from the surface of the fabric in this part,
This may cause warp threads to get caught or disturb the fabric surface.

FIG. 11 shows such a structure.
When the warp thread color is continuous on the line, the warp thread easily separates from the surface of the fabric, and as shown in FIG. 12, when the weft thread is exposed to the surface in the middle of the continuous warp thread color, the warp thread is stopped.
Floating can be prevented.

In order to perform such processing, the computer 10 prevents the warp of the warp yarn from floating according to the flowchart shown in FIG.

In step 1, in order to check the floating state of the warp threads in the warp direction line from the structure chart of FIG. 9, L = 1 is set, and in step 2, the structure chart data of the L line is read.

Then, the number of continuous warp thread colors is checked from the read data (step 4). This continuous number is checked by comparison with a predetermined floating prevention organization chart shown in FIG. 14. Here, the number of checks is a value corresponding to the Y size of the floating prevention organization, that is, 4. Then, if the number of consecutive checks is greater than or equal to the number of checks, the process moves to step 5, and the floating prevention organization is fitted, and if it is less than the process moves to step 6.

The fitting of this floating prevention structure is shown in FIG.
As shown in Fig. 9, the floating prevention structure is developed in the same size as the structure chart of Fig. 9, and the warp thread color portion where the continuous number is equal to or more than the check number, that is, the hatched area in (a) and the diagonal line in (b). It is to replace the overlapping portion of the floating prevention points filled in with the weft thread color (black) with the same color as the warp thread color, as shown in (c).

In the case of FIG. 15, the floating prevention structure is fitted to the fifth vertical line from the right, whereby the continuous warp threads can be stopped at predetermined intervals by the weft thread as shown in FIG. . In other words, in the part where the warp thread is replaced with the weft thread, the black weft thread is pulled out from the back side of the fabric to the surface, passes through the surface of the warp thread and is drawn back to the back side again, so the warp thread that has continuously appeared on the surface is It is covered with weft threads on the way and stopped.

The number of checks of the continuous number can be set freely according to the density of floating prevention, and the smaller the number of checks, the narrower the interval of floating prevention by the weft.

Steps 6 to 8 are routines for repeating such a check of the floating state of the warp thread and fitting of the floating prevention structure for each warp line, and are completed when this operation is executed over all the lines.

By the way, in order to prevent the warp thread from floating, the weft thread color for stopping the float is made to be the same color as the warp thread, so that the color of the pattern on the surface of the fabric can be matched exactly with the image data.

In this way, fitting of the warp prevention mechanism of the warp threads is performed, the organization chart is corrected as shown in FIG. 15C, the weft thread allocation is corrected, and the conversion of the pattern paper data is performed based on this. I do. When a woven fabric is woven by a jacquard loom based on the pattern paper data, it is possible to woven a fabric that is faithful to the image data of FIG. 4 and has no warp thread floating on the surface of the fabric. It should be noted that since the creation of pattern paper data from the organization chart is well known, detailed description thereof will be omitted.

[0043]

As described above, according to the present invention, when the warp yarn that is produced by replacing the weft yarn on the surface of the fabric is continuous in the warp line direction, the weft yarn of the same color as the warp yarn can be used to stop the process. Therefore, it is possible to prevent the warp yarns from floating from the surface of the fabric, and to reliably prevent the warp yarns from being caught or the fabric surface from being disturbed. Further, since the warp threads are stopped by the weft threads of the same color, the color specified in the weft thread portion for preventing the plow does not change, and the image data can be accurately reproduced on the fabric.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of an array in order for pseudo-synthesizing an intermediate tone by a dither method.

FIG. 2 is an explanatory diagram showing a similar intermediate tone pattern.

FIG. 3 is an explanatory diagram showing an example of image data.

FIG. 4 is an explanatory diagram of an organization chart obtained by converting image data into color data of eight colors.

FIG. 5 is an explanatory view showing an ideal woven fabric surface woven according to the organization chart.

FIG. 6 is an explanatory view showing a woven fabric surface actually woven according to the organization chart.

FIG. 7 is a flow chart showing a control operation of fitting a vertical organization.

FIG. 8 is an explanatory diagram showing an example of a color arrangement corrected by fitting a projected tissue.

FIG. 9 is an explanatory diagram showing an organization chart corrected by fitting of a projection organization.

FIG. 10 is an explanatory view showing a woven fabric surface according to the corrected organization chart.

FIG. 11 is an explanatory diagram showing a state where warp threads are floating.

FIG. 12 is an explanatory diagram showing a state in which the warp yarn is prevented from floating by the weft yarn.

FIG. 13 is a flowchart showing a control operation of fitting of a warp floating prevention structure.

FIG. 14 is an explanatory diagram showing an example of a floating prevention structure.

FIG. 15 is an explanatory diagram showing a process of fitting a floating prevention structure.

FIG. 16 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 17 is a claim correspondence diagram showing the configuration of the present invention.

[Explanation of symbols] 21 optical reading means 22 organization chart creating means 23 weft thread color assigning means 24 warp thread color selecting means 25 weft thread continuous number checking means 26 weft thread assigning correcting means 27 warp thread continuous number checking means 28 weft thread re-correcting means

Claims (1)

[Claims] 1. A means for optically reading a photograph or the like as image data, and an organization chart of a predetermined matrix for pseudo reproduction with a limited number of colors in which an intermediate color tone is limited by a dither method based on the image data. Means, a means for allocating the limited number of weft thread colors in accordance with this organization chart, a means for selecting one of the weft thread colors as a warp thread color, and a means for allocating each weft thread in each line. Means for comparing the number of consecutive same colors with a preset number of checks, and means for correcting the weft thread allocation so that the weft thread color is replaced with the warp thread color when the number of consecutive checks is less than the check number, and from the weft thread color A means for comparing the number of consecutive warp lines in the warp line that has been replaced with a preset number of checks; A photographic weaving apparatus comprising: means for correcting the weft thread allocation again so as to replace the warp thread color with the same weft thread color at predetermined intervals.