JPS62206554A - Formation of deformed image - Google Patents

Abstract

PURPOSE:To provide a high degree of freedom of deformation processing, difficulty in the generation of the deterioration in image quality and improvement of workability by adding the deformation processing to digitized image data. CONSTITUTION:A photographic original 2 is attached to a scanning part 1 of a scanner for printing photoengraving and is subjected to scanning for reading; at the same time, the respective image signals of red, blue and green obtd. by the scanning are subjected to color conversion processing for printing and are converted to the corresponding image signals. The image signals of Y, M, C, Bk are then digitized by an interface 3 for inputting and are taken into a memory part 4a according to the control of a control device 4. The digital data on the apparatus corresponding to the original 2 and the density valves of the color corresponding color components are stored in the respective picture element regions. The digital data in the memory part 4a are then subjected to processing by using the deformation program 4c for conversion to the desired deformation image preliminarily prepd. in the control device 4 and the digital data subjected to the deformation processing are recorded in a memory part 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image deformation method for performing special processing on a photographic original to create a deformed image for printing plate making.

The present invention is applicable to printing fields that require creative expression,
For example, it is used for printed materials such as advertisements, advertisements, and interior products.

(Prior art) Conventionally, a photographic original is photographed through a reflecting mirror with a special surface shape to create an optically deformed image, and then printed using a photoengraving or printing plate scanner. A method was used to create a deformed image for plate making.

(Problems to be Solved by the Invention) According to the conventional method, the degree of freedom for deforming the photographic original is restricted by optical methods, and it is necessary to use a plurality of photosensitive materials. Therefore, there are drawbacks such as deterioration in image quality and poor workability since it is necessary to perform plate making of the deformation using a photolithographic or printing plate making scanner after the deformation.

[Structure of the invention]

(Means for Solving the Problem) According to the present invention, an image signal obtained by attaching a photographic original to the scanning unit of a printing plate-making scanner and performing reading and scanning is divided into a plurality of pixels, and each pixel is divided into means for importing the image data into a storage device as digital data, and a storage address corresponding to one scanning line of the scanner in the scanning direction or one direction perpendicular to the scanning line, corresponding to the storage address of the image data imported into the storage device; - A means for performing processing necessary to express a desired deformed image in units of storage addresses of image data or storage addresses for each pixel, and a means for performing the processing necessary to express the desired deformed image in units of storage addresses of image data or storage addresses for each pixel, and a means for transmitting the processed image data to an exposure section of a printing plate-making scanner. The above object is achieved by providing a means for supplying a plate to a plate to form a plate-made image deformed into a desired shape.

(Function) According to the present invention described above, since the deformation process is applied to the digitized image data, there is an advantage that the degree of freedom in the deformation process is high.

Furthermore, in the present invention, processing is carried out in an integrated system from reading a photographic original to making a plate of a deformed image, so there is an advantage that image quality deterioration is less likely to occur and workability is improved.

(Example) Hereinafter, the present invention will be described in more detail based on an illustrative example.

FIG. 1 is a block diagram showing an example of an apparatus for carrying out the method according to the present invention, in which 1 is a scanning section of a scanner for printing plate making, 2 is a photographic original, 3 is an input interface, 4 is a control section, and 5 1 is a keyboard, 6 is a coordinate input device, 7 is an output interface, 8 is an exposure section of a printing plate making scanner, 9 is an exposed image, and 10 is a display device for displaying an image.

To explain the operation of the present invention, first, a photographic original 2 is attached to the scanning unit 1 of a printing plate-making scanner, and the photographic original 2 is read and scanned, and the red, blue, and green image signals obtained by scanning are printed. Color conversion processing is performed for yellow, magenta, cyan, black (hereinafter Y%M
.

0, Bk) into an image signal corresponding to the printing color separation, and then the input interface 3 converts the Y,
Digitize each image signal of M%O, Bk,
Storage unit 4a belonging to the control device 4 under the control of the control device 4
Incorporate into. In the storage unit 4a, for example, as shown in the figure, respective areas are allocated for each Y%M1C%Bk, and each of the areas is further divided into respective pixel areas, and each pixel area has a photographic original. Digital data of the position corresponding to 2 and the density value of the corresponding color component are recorded.

Next, the processing described below is performed for each of the printing color separations using a transformation program 4C for converting the digital data in the storage unit 4a into a desired transformation image prepared in advance in the control device 4. The transformed digital data 43-46 is recorded in the storage unit 4b belonging to the device 4.

The digital data in the storage section 4b obtained by applying the desired transformation processing to the photographic original as described above is supplied to the exposure section 8 of the printing plate making scanner via the output interface 7, thereby converting the photographic document into a printable document. An exposed image 9 separated into separated colors is obtained.

Note that the control device 4 has a processing function that is generally referred to as a minicomputer.

Furthermore, the storage units 4a and 4b often use magnetic disk devices, and there may be a plurality of magnetic disk devices depending on the capacity of data to be handled.

Furthermore, if it is necessary to visually confirm the image data stored in the storage unit 4a or 4b, the image data may be supplied to the image display display device 10 under the control of the control device 4. You can also check.

Further, the keyboard 5 or the coordinate input device 6 is used to input a command to start the transformation program 4C and input various parameters.

FIG. 2 is a conceptual diagram schematically representing the image data stored in the storage units 4a and 4b of the control device 4 in order to explain the concept of the deformation process of the present invention, and FIG. , (+) to (θ) in the figure are image data corresponding to one image data line corresponding to the deformed image, 103 is the pixel of the image data, and 104 is image data corresponding to the photo original. (hereinafter simply abbreviated as photo original), and 106 to 109 are image data corresponding to deformed images (hereinafter simply abbreviated as deformed images). In addition, the number shown in the frame indicating the pixel in the figure indicates the storage address of the storage unit 4a, and the left-hand number of the two-digit number indicates the storage address in the X direction of 'M 26 (a). ,Also,
The numbers on the right side indicate storage addresses in the Y direction in FIG.

The photo original 104 is shown in FIGS. 2(b) to 2(e).
The pixels necessary for transformation are selected from each pixel in the storage unit 4.
An example of the result of moving to b is shown.

FIG. 2(b) is an example of a desired deformed image in which image data 102 for one scanning line of a printing plate making scanner is expressed as a function of the scanning line number of the scanning line. , the address data of the storage address of the storage unit 4b is calculated for each image data 102 based on the function, and the modified image 106 obtained by moving the photo original 104 to the storage address of the storage unit 4b is shown. .

FIG. 2(0) shows a desired deformed image in which the number of pixels of the image data 102 increases or decreases as a function of the scanning line number of the scanning line of the image data 102 of one scanning line of the printing plate making scanner. This is an example of an image in which the image data 102 is calculated as a unit (: magnification) based on the function, the address data of the storage address of the storage unit 4b is obtained from the result, and the photo original 104 is transferred to the storage unit. A modified image 107 obtained by moving to the storage address 4b is shown.

Figure 2 (i) shows that a desired deformed image increases or decreases in the number of pixels of the image data as a function of the pixel number in the scanning direction of the scanning line in units of image data in the direction perpendicular to the scanning line of the printing plate making scanner. A modified image 108 obtained by determining the address data of the storage address in the storage unit 4b and moving the photo original 104 to the storage address in the storage unit 4b is shown.

FIG. 2(e) shows that the magnification is calculated for each pixel of the photographic original 104 so that the desired deformed image is an image obtained by deforming the photographic original 104 into a spherical shape, and based on the results, the magnification is stored in the storage unit 4b. Find the address data of the memory address and write the photo original 1゛04
A modified image 109 obtained by moving the image to the corresponding storage address in the storage unit 4b is shown.

3 to 5 show flowcharts of the method according to the invention.

FIG. 3 (To explain with reference to FIG. 2, first, in step 810, the process is performed up to the step of inputting the photo original to store the photo original in the storage unit 4a. Next, in step 811, (1) Coordinates of the photo original (2) Transformation) Coordinates of Image Forming Surface (3) Specify the coordinate data of the coordinates of the viewpoint.

Then, in step E112, based on the coordinate data designated in step 811, a deformation process is performed to move the photographic original 104 to the storage section 4b according to the processing procedure described later, depending on the type of desired deformed image.

Finally, in step S13, the image data in the storage unit 4b obtained by the transformation process 812 is supplied to the exposure unit 8 of the printing plate making scanner to form a modified image and output the modified image.

FIG. 4 is a flowchart of a method of transforming image data for one scanning line of a printing plate-making scanner or one image data in a direction orthogonal to the scanning line, as a unit of transformation processing according to the present invention. This is what is shown. First, step 510
1, between the storage units 4a and 4b of the control device 4,
The image data for one line is stored in a line buffer for transferring data to a desired storage address in the storage section, and the contents of the line buffer are updated.

Next, in step 5102, the storage addresses of the storage units to which the contents of the line buffer are to be transferred are calculated and summed.

Then, in step 5103, by transferring the contents of the line buffer to the storage address obtained by the calculation, the contents of the line buffer are transferred to the storage unit 4b (output file).
Image data for lines is stored. Then, in step 104, it is confirmed that all image data of the photo original 104 has been transferred, and if it has not been transferred, 510
1, and if it has been transferred, this process ends.

Furthermore, using FIGS. 3 to 12, (C) in FIG.
The processing content for obtaining the deformed image shown in (d) will be explained in detail. FIG. 3 is a side view for explaining parameters used in the deformation process, FIG. 7 is a plan view, and FIG. 8 is a front view.

In the figure, 201 is a viewpoint, 202 is a photographic manuscript, and 20
3 shows a deformed image. Then, the distance from the viewpoint 201 to the bottom of the photo original 202 is )'%eD, the height of the photo original 202 is the length of the bottom of the photo original 202e, and the length of the bottom of the photo original 202 is from the left side of the bottom of the photo original 202 to the top of the deformed image 203. The distance to the bottom left side is T.

If O is the angle between the photographic document 202 and the deformed image forming surface, then the height of the deformed image 203) I (1 is determined by the following equation).

In addition, the width W (1 is shown in FIG. 8(a)) occupied by the deformed image 206 is
) to CQ), there are three cases, each of which is determined by the following equation.

In the case of Too (Fig. 8 (a)) Wchi ITI Wd=软十等 groan ・・・・・・・・・(2) 0≦T≦
In the case of WO-L (Fig. 8(b)) Wd = conductor
・・・・・・・・・(3) In the case of Ushi-LET (Fig. 8 (
C)) Q W (1=T+L where L is given by the following formula.

e In the above manner, the size of the storage area "Hti, Wd) to be prepared in the storage section 4b is determined.

Next, in order to form a deformed image as shown in FIG. 2(C), for example, the magnification of the image data is changed line by line, with image data for one line in the scanning line direction of the photographic original 104 as a unit. The processing means that performs the transformation will be explained below.

FIG. 9 is a coordinate diagram showing the relationship between the photo original, the deformed image, and the viewpoint. 0
), and the coordinates of the viewpoint are (D, 0), then the coordinates (Xt, Yt) of the top of the photographic original can be determined by the following equation.

From (5) and (6) Therefore, the larger one of equation (7) is the solution.

however A: +1 i2 Further, the inclination K of the photographic original is given by the following equation.

Based on the above, the magnification Bnh in the scanning line direction at an arbitrary scanning line number n is determined. FIG. 10 shows the coordinates (In) of the photographic original corresponding to the n-th scanning line.

FIG. 3 is a coordinate diagram showing the relationship between coordinates (0, Hn) of a deformed image and coordinates (0, Hn) of a deformed image. From the same figure, In%Y! 11j are respectively expressed by the following equations.

From the above, Bnh can be found from the following equation.

Bnh"V'5y52 ・・・・・・・・・(2) If the T angle oH between the photo original and the deformed image is given in advance as shown in Figure 3, then = 1/ You can use tea @.

The photographic original 104 is transferred to the storage address obtained by multiplying the storage address of the photographic original 104 in the storage unit 4a corresponding to each f and f line by the magnification Bnh shown as a function of the scanning line number n obtained in this way. Moving each image data: Thus, a desired deformed image is formed in the storage section 4b.

As another example, in order to form a deformed image as shown in FIG. A processing means that performs deformation by changing the magnification will be explained.

FIG. 11 is a coordinate diagram used to show the magnification Bnw of an arbitrary n-th line in the direction orthogonal to the scanning line, and in the figure,
The length of the deformed image of the n-th line is represented by Ln, and the difference between the length Wo of the bottom of the photographic original and Ln is represented by Mn. Since the sought magnification Bnw is the ratio of °Lnw and In+Mn (=We), it can be expressed as follows: vt/e where d.

By multiplying the corresponding storage address of the photographic original 104 in the storage unit 4a by the magnification BnW obtained in this manner and moving each image data of the photographic original 104 to the storage address obtained, a desired deformed image is created in the storage unit 4b. is formed. The shape of the deformed image is shown in FIGS.
It is roughly divided into three types shown in C).

Further, as another example, processing means for forming a spherical deformed image as shown in FIG. 2 (θ) will be described.

FIG. 5 is a flowchart showing the processing means.

First, in step 5201, the size of the storage area to be prepared in the storage unit 4b is calculated. Next, step 520
2, the contents of the line buffer for transferring data between the storage units 4a and 4b of the control device 4 are updated. Next, in step 5206, one pixel worth of image data comprising the line buffer is updated. Next, in step 5204, a magnification for each unit pixel is calculated to transform the photo original into a spherical shape, which will be described later. Next, in step 5205, the storage address of the photographic original 104 is multiplied by the magnification obtained by the calculation described above, and the storage address obtained is
04 data is transferred to the line buffer.

Then, in step 5206, if data for one line of the photo original 104 is stored in the line buffer, the process advances to step 5207, and if not, the process returns to step 5203.

In step 5207, the data for one line is transferred to the storage section 4b (output file).

Finally, in step 8208, it is confirmed that the data has been transferred for all lines of the photo original 104. If the data has not been transferred, the process returns to step 5202, and if the data has been transferred, the process ends.

FIG. 13 is a conceptual diagram for explaining the calculation contents of the magnification described in step 5204. In the figure, 202 is a photo original, 203 is a modified image, and 204 is a modified image 204
shows the sphere formed.

In this process, one point on the photo original 202 is shown in FIG.
The purpose is to find a point P obtained when projected onto the sphere 204 along two axes.

FIG. 14 is a coordinate diagram for determining the coordinates (X, Y) of one point P on the sphere 204 shown in FIG. 16. Figure 14 (a
) is a diagram of the sphere 204 cut along the X-Y plane, (b) is a diagram of the sphere 204 cut along the Y-Z plane, and (C) is a diagram of the sphere 204
It is a diagram cut on the X-Z plane, and Rx in the diagram is the same diagram (C
), and Ry indicates the radius of 1/(b).

Therefore, the coordinates (X, Y) of the one point P described above can be found by multiplying the coordinates (Xo, Yo) of the one point PO described above by the magnification Bx of the X component and the magnification By of the Y component. And BX, Ba1l-! It is shown by the following formula.

Bx=2R・6・Ax ・・・・・・・・・α B7=2R0 meeting rAy −°−°−−−−−Qf9
However, ra) do recommendation (Z/X) y ≦-(Z/7) 2 Rx'-X' Rx=≠(2Y2 R7=kyutsu7 Also, the coefficients Ax and Ay of formula is photo manuscript 20
The following values are taken from the relationship between the height HO of 2 and the length of the base Wo.

When Ay=T/%l@11bgN, Ax=%-&/H45Ay:1 FIG. 15 shows an example of the results of this example. (a) of the same figure shows a photographic original, and (b) of the same figure shows a modified image.The number of images of the image data in the scanning direction of the scanning line is shown at the top of T0 (1) of the same figure. It shows the transformed image when processing is performed to increase or decrease it as a function of A deformed image is shown.

Further, an example of another result obtained in the example is shown in FIG. 16. FIG. 4A shows a photographic original, and FIG. 1B shows a deformed image that has been processed so that the deformed image becomes spherical.

〔Effect of the invention〕

As explained above, according to the present invention, digitized image data is stored in a storage device and subjected to transformation processing, thereby eliminating the shortcomings of the conventional technology, allowing for a high degree of freedom, and enabling transformation processing without image quality deterioration. 1. Special printed materials featuring creative expressions can now be easily obtained.

In addition, the process from scanner scanning to scanner exposure can be performed in an integrated system, which has the effect of improving work efficiency.

[Use of invention]

The method for creating a deformed image according to the present invention is widely used, for example, in the following applications.・■Applications for creating special effect images such as those obtained when photographic originals are projected onto the surface of water with waves.

■Used to create images similar to those obtained when a photographic original is projected onto a spherical object.

■Used to create complex patterns for interior products, etc.

■Used to create special characters used in advertisements and promotions.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of an apparatus for carrying out the method according to the present invention, FIG. 2 is a conceptual diagram showing processing contents in an embodiment of the present invention, and FIGS. Flowcharts illustrating such a method FIGS. 3 to 14 are principle explanatory diagrams illustrating the principle of deformation processing in an example in which the method according to the present invention is implemented, and FIGS. 1.5 and 16 illustrate the effects of the present invention. In the figures, (a) is an explanatory diagram showing the state before deformation, and (b) is an explanatory diagram showing the state after deformation. 1................................................................... Scanning section of scanner for printing plate making 2......Photo original 3.
・・・・・・・・・・・・・・・・Input interface 4・・・・・・・・・・・・・・・・Control unit 4a, 4b...・・・Storage unit 4c・・・・・・・・・・・・・・・Transformation program 5・・・・・・・・・・・・・・・・・・Keyboard 6
・・・・・・・・・・・・・・・Coordinate input device 7
・・・・・・・・・・・・・・・Output interface 8・・・・・・・・・・・・・・・Exposure section 9 of printing plate making scanner...・・・・・・・・・・・・
・・・・・・Exposure image 10・・・・・・・・・・・・・・・
...Display device 104 for displaying images...
. . . Image data 106 to 109 corresponding to the photographic manuscript - . . . Image data 201 corresponding to the deformed image . . . Viewpoint 202 . . .
・・・・・・・・・Photo manuscript 203 ・・・・・・・・・
...Deformed image 204...Ball patent applicant Dai Nippon Printing Co., Ltd. agent Patent attorney Konishi ~ Atsumi Figure 1 Figure 3 Figure 2 Figure 4 Figure 8 (a) (b) (C) Figure 9 y Figure 11 Figure 12

Claims (6)

[Claims] (1) In a method of creating a modified image for printing plate making from a photographic original, the photographic original is divided into a plurality of pixels through the scanning unit of a printing plate making scanner, and each pixel is stored as digital image data. creating transformed image data by applying processing based on movement of storage addresses to the image data stored in the storage device;
A method for creating a deformed image for printing plate making, characterized in that, after storing the image data in the storage device, a deformed image is created by supplying the image data to an exposure section of a scanner for printing plate making. (2) The above-described process is a first process in which the scanning line is moved by determining a movement amount that is a function of the scanning line number of the scanning line in the scanning direction. A method for creating a deformed image for printing plate making according to scope 1. (3) The above process is a second process in which the number of pixels of data in the scanning direction of the scanning line increases or decreases as a function of the scanning line number of the scanning line. A method for creating a deformed image for printing plate making as described in Section 1. (4) The above-mentioned processing is a third processing in which the number of scanning lines of the scanning line increases or decreases in units of the pixel as a function of the pixel number in the scanning direction of the scanning line. The method for creating a deformed image for printing plate making according to item 1. (5) A modification for printing plate making according to claims 1, 2, and 3, wherein the above-described process is a process that combines the first process and the second process. How to create images. (6) A patent claim characterized in that the above-mentioned processing is processing in which each unit pixel of image data corresponding to the photographic original is multiplied by a scaling factor so that the photographic original becomes an image deformed into a spherical shape. A method for creating a deformed image for printing plate making according to item 1.