JP2008177797A - Image processor, image forming device provided with the same, and show-through-effect-image processing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processor that highly precisely generates an image of an original-manuscript face as a reading target while removing a show-through-effect image in just proportion. <P>SOLUTION: The image processor has an image input part 13 for inputting image data, a surface-image processing means 10A that sets a front density-level value to surface-image data so as to generate front-image data in which an image part exceeding the front density-level value is removed, a rear-face-image processing means 10A that sets a rear density-level value into rear-face-image data so as to generate rear-image data in which an image part below the rear density-level value is removed, a mirror-image generating means 10A which generates image data of a mirror image generated by subjecting an image formed on the basis of the rear-image data to mirror-image reversal, a first image-composition means 10A which composites the front-image data with the mirror-image data by a logical product so as to generate first composite data in which a show-through-effect image is specified, and a second image-composition means 10A that composites the surface-image data with the first composition data by an exclusive OR so as to generate second composite data in which a front image of the reading target is specified. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, when a document is read (scanned), not only an image such as a character graphic (image to be read) drawn on the front side to be read (an image to be read) but also unnecessary characters drawn on the back side The present invention relates to a technique for dealing with a case where a so-called “show-through” occurs in which even an image such as a figure (a show-through image) is read.

  Even when a transparent material such as thin paper is used as the original sheet material, character figures and the like may be drawn on both sides thereof. When a document on which images are drawn on both sides of such a thin document sheet material is read, “show-through” occurs. When image formation is performed based on the show-through image data, an unnecessary image (show-through image) is mixed in the output image, which is difficult to see. As a general countermeasure when such show-through occurs, the density of the read image has been reduced. Since the show-through has a low density, the show-through is removed by deleting the thin portion. However, if the density is reduced, the entire density becomes thin and the object to be read is erased, but the low density part disappears from the beginning. Therefore, the simple problem of reducing the density cannot solve the problem of show-through. Therefore, various techniques for dealing with show-through have been studied.

  First, the background level of the original (background color of the original sheet material) is detected, the density is averaged for pixels in a predetermined density range, this density average value is used as an offset value, and the background level is added to this offset value. An apparatus that employs a technique for removing the background (automatic density adjustment) using the background standard density has been proposed (Japanese Patent Laid-Open No. 3-68270, etc.). However, since this background removal technique does not actively detect information about show-through, the show-through cannot be reliably suppressed. Even if the show-through of the document can be suppressed, there is a problem that the highlight area is removed together with the removal of the show-through.

  Therefore, Patent Document 1 proposes an image processing apparatus including a show-through determination circuit that determines a show-through area as a technique for solving the inconvenience of the technique based on the background removal. Further, Patent Document 3 proposes an image processing apparatus in which a reverse image is reversed left and right so that unnecessary reverse image information is erased from read image information on a surface to be read.

JP-A-8-340447 JP 2004-40143 A

  However, the image processing device disclosed in Patent Document 1 requires an area determination circuit that performs advanced show-through determination, and thus becomes an expensive device, and an error may occur in the show-through determination. Further, the apparatus disclosed in Patent Document 2 does not consider handling of a portion where a front image to be read and a show-through image overlap. Therefore, if the erasure process is performed assuming that the front and back overlapping portions are back images, a part of the image (read image information) on the front surface to be read is erased.

  Therefore, a main object of the present invention is to provide an image processing apparatus that can remove a show-through image without excess and deficiency and can accurately generate an image of a document surface to be read.

  The purpose is to set an image input unit capable of inputting image data on the front side of the document to be read and the back side of the document not to be read, and to set a table level value relating to the density for the front side image data. The front image processing means for generating the front surface deletion image data in which the image portion that is equal to or higher than the front level value is deleted, and the back surface value value for the density is set for the back surface image data, and the image portion that is equal to or lower than the back level value is deleted. Backside image processing means for generating the backside extracted image data, mirror image generation means for generating mirror image data obtained by mirror-inversion of an image formed based on the backside extracted image data, the surface deletion image data, and the above First image synthesizing means for generating first synthesized data specifying a show-through image by synthesizing the mirror image data with logical product, the surface image data and the first image data; A synthesizing data by combining the exclusive ORing, can be achieved by an image processing apparatus and a second image synthesizing means for generating a second synthesized data identifying the table image to be read.

  It is more desirable that the image processing apparatus further includes level value setting means capable of arbitrarily setting at least one of the front level value and the back level value.

  Further, the object is generated by the image processing device, an image reading device that reads images drawn on both sides of the document, and generates the image data to be input to the image input unit, and the second synthesizing unit. This can also be achieved by an image forming apparatus including an image output apparatus that outputs an image based on the second composite data.

Further, the above object is to obtain image data for each of the front and back surfaces of the document, and to set a table level value relating to the density of the front surface image data to be read and delete an image portion that is equal to or higher than the table level value. Generating the front side deleted image data, setting a back level value related to the density for the back side image data not to be read, and generating back side deleted image data by deleting an image portion that is equal to or lower than the back level value, A step of generating mirror image data obtained by mirror-inversion of an image based on the back surface deletion image data, and first composite data specifying the show-through image by combining the front surface deletion image data and the mirror image data with a logical product. Generating step;
The image processing method can be similarly achieved by combining the surface image data and the first composite data with exclusive OR, and generating second composite data specifying a table image to be read. .

  Further, the object is to provide an image input unit capable of inputting image data on the front side and the back side not to be read, and front and back information embedding means for embedding front and back information of the image data. A deletion data embedding means for generating table image data in which deletion image data is embedded in order to delete a portion of an image that has a table level value greater than or equal to the table level value by setting a table level value relating to the front surface image data; Extracted data embedding means for generating back image data in which extracted image data for embedding extracted image data for setting a back level value for density and deleting an image portion that is equal to or lower than the back level value is set for data. This can also be achieved by the image processing apparatus.

  Further, the above object is to delete an image input unit capable of inputting image data on both sides of a document, and to set a table level value relating to density for both the image data, and to delete an image portion exceeding the level value. Deletion data embedding means for generating first image data in which image data is embedded, and for setting a back level value related to density for both the image data and deleting an image portion that is equal to or lower than the back level value It can also be achieved by an image processing apparatus characterized by having extraction data embedding means for generating second image data in which the extracted image data is embedded.

  The image processing apparatus includes a computer that generates an image from which show-through is removed based on the image data acquired from the image processing apparatus, and the computer forms a mirror image of the image formed based on the image data. According to the show-through image processing system, the inversion processing, the first composition processing for specifying the show-through image, and the second composition processing for specifying the front image are performed to generate an image with show-through removed. The objective can be achieved.

  As described above, according to the present invention, it is possible to provide an image processing apparatus that can remove a show-through image without excess or deficiency and accurately generate an image of a document surface to be read.

  An image processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. This image processing apparatus generates an image (read image) data to be read by performing an accurate show-through removal process without excessive or insufficient images including a show-through.

  FIG. 1 is a block diagram illustrating a configuration of an image processing apparatus 1A according to an embodiment. However, FIG. 1 shows an image reading device 2 that reads (scans) an image such as a character graphic drawn on a document and outputs the image data, and outputs a corresponding image based on the input image data. The image processing apparatus 1 is disposed between the image output apparatus 3 and the image output apparatus 3. As shown in FIG. 1, when the image reading apparatus 2, the image processing apparatus 1 </ b> A, and the image output apparatus 3 are configured, the image forming apparatus 5 is formed as a whole.

  The image reading device 2 shown in FIG. 1 can be a scanner device that scans light, reads a document, and outputs the image data. The image output device 3 can be a device that outputs an image formed based on image data, such as a printer device or a display device. The image processing apparatus 1A is located between the apparatuses 2 and 3 and performs a predetermined process when there is a show-through in the image data output from the image reading apparatus 2. Then, the image data from which the influence of the show-through has been removed (the show-through removal process has been performed) is supplied to the image output apparatus 3. Therefore, the image output device 3 is a device that prints a beautiful image without show-through on paper or displays it on a display. The image forming apparatus 5 having these functions integrally can be formed, for example, as a copying apparatus having a show-through prevention function.

  Further, the following description will be focused on the image processing apparatus 1A having a characteristic show-through removal function. The image processing apparatus 1A includes a ROM (Read Only Memory) 11, a RAM (Random Access Memory) 12, and the like, and is configured around a CPU (Central Processing Unit) 10A. The upstream side of the apparatus 1 is connected to the image reading apparatus 2 via an input IF (Interface) 13 serving as an image input unit. In this embodiment, the front and back images of the document are read and the respective image data are supplied to the input IF 13. Further, the downstream side is connected to the image output device 3 via the output IF 14.

  The CPU 10 </ b> A executes various calculations for performing a show-through removal process described later on the image data input from the image reading device 2. At this time, the CPU 10A reads a program for executing the show-through removal process stored in advance in the ROM 11 and data related thereto. The image data is temporarily stored in the RAM 12 and subjected to processing as described later. A storage device such as an HDD (Hard Disk Drive) may be further arranged in the image processing apparatus 1A.

  FIG. 2 is a functional block diagram of the image processing apparatus 1A. The functions shown here are mainly realized by the CPU 10A. In FIG. 2, the front surface image data input unit 111 and the back surface image data input unit 112 are realized by the input IF 13 in FIG. The image output unit 113 is realized by the output IF 14 of FIG.

  The surface image processing means 115 realized by the CPU 10A sets a table level value related to the density for the surface image data input to the surface image data input unit 111, and deletes an image portion that exceeds the table level value. Generate image data. This surface deleted image data is supplied to the first image composition means 118 described later.

  Similarly, the back surface image processing means 116 realized by the CPU 10A sets a back level value related to density for the back surface image data input by the back surface image data input unit 112, and deletes an image portion that is equal to or lower than the back level value. Backside extracted image data is generated. Further, the CPU 10A functions as a mirror image generation unit 117, and generates mirror image data obtained by inverting the image formed based on the back surface extraction image data. This mirror image data is also supplied to the first image composition means 118.

  Further, the CPU 10A functions as the first image synthesizing unit 118, and generates the first synthesized data specifying the show-through image by synthesizing the surface deletion image data and the mirror image data with a logical product (AND). Finally, the CPU 10A functions as the second image synthesizing unit 119, and synthesizes the surface image data and the first synthesized data by exclusive OR (XOR) to identify the table image to be read. Second composite data is generated. This second composite data is image data of the surface (read target surface) from which the show-through has been removed, and is output via the image output unit 113.

  Hereinafter, the show-through removal processing executed by the CPU 10A will be described in more detail with reference to the drawings. FIG. 3 is a schematic diagram that summarizes the show-through removal processing executed by the CPU 10A so that it can be easily understood. (A) is processing for the front surface to be read, (B) processing for the back surface, and A composition process for forming an image from which show-through has been removed is shown.

  First, the state of the original sheet material ST will be described with reference to (A). On the surface (surface) to be read, a large clear character “F” is drawn at the center, and a small character “E” having a relatively low density is drawn at the upper right. On the back side, a medium letter “C” is drawn in the lower right, and this is reflected on the front side as an inverted character. In this setting, particularly, the front character “F” and the show-through character “C” partially overlap each other.

  In the surface processing shown in (A), the CPU 10A sets a table level value relating to density, and generates surface deleted image data in which an image portion that is equal to or higher than this table level value is deleted. The image (0) shown here represents the original surface image data (original surface image data) as it is when the surface is read by the image reading device 2. Therefore, an inverted character “C” that shows through appears in the image based on the surface image data. The CPU 10A performs a process of deleting an image portion having a density equal to or higher than the table level value FT on such surface image data to generate surface deleted image data. By this surface image processing, a relatively dark portion drawn on the surface is removed. The image based on the surface deleted image data is the image (1). FIG. 3A illustrates an image (1) whose density is equal to or lower than the table level value.

  In the back surface processing shown in (B), the CPU 10A sets a back level value relating to density, and generates back side extracted image data in which an image portion that is equal to or less than the back level value is deleted from the input back surface image data. Further, mirror image data is generated by mirror-inverting an image formed based on the back surface extraction image data. That is, the CPU 10A performs processing for deleting an image portion having a density equal to or lower than the back level value RT from the back surface image data to generate back surface extracted image data. By this processing, the relatively light-density portion appearing on the back surface is removed, and the original back image is specified. Furthermore, data obtained by mirror inverting this is generated. An image based on the mirror image data is an image (2). As shown in FIG. 3B, the image (2) is an image of the original back image (that is, the character “C”) that does not overlap with the characters on the front side.

  Then, the CPU 10A performs a first synthesis process. In this process, the image (1) and the image (2) are combined by AND (AND) to specify a show-through image to be removed. In this case, the common part of the image (1) and the image (2) is specified as the show-through image (3) to be removed. As shown in FIG. 3C, the image (3) is an image obtained by removing the overlapped portion with the character “F” from the show-through image of the character “C”.

  Finally, the CPU 10A performs a second synthesis process. The processing here is an exclusive OR (XOR) of the image (3) obtained by the first composition processing and the image (0) based on the surface image data as it is read by the image reading device 2. To identify an image from which the show-through has been removed without excess or deficiency. In this case, the image obtained by removing the common part between the image (3) and the image (0) can be specified as the original surface image without the influence of show-through.

  As is clear from the above description, according to the image processing apparatus 1A, even if the front image data includes the show-through, the show-through is removed without excess or deficiency using the back-side image data, and is read. The original surface image data can be generated with high accuracy. In particular, as described above, the CPU 10A specifies the show-through image (3) to be removed by the process by mirror inversion and the first composition process by logical product (AND), and this image (3) by the subsequent second composition process. ) And the original surface image (0) with show-through are synthesized by exclusive OR (XOR) to obtain a final image with show-through removed. In the final exclusive OR (XOR) process, the image on the front side is set to be given priority in the overlapping portion between the show-through image and the image on the front side. Therefore, as shown in FIG. 3, the overlapping portion of the front image and the show-through image, which has been difficult to deal with in the past, that is, the front letter “F” and the rear letter “C” in FIG. Even if there is a part that overlaps with “,” it is possible to form a clear surface image having no missing part.

  Further, a method for setting the front level value FT and the back level value RT used when the CPU 10A performs the show-through removal process will be described. In FIG. 3A, the front level value FT set for erasing an image darker than a certain density and the back level value RT set for erasing an image thinner than a certain density are predetermined values stored in advance in the ROM 11 or the like. You may make it employ | adopt. However, since the material of the original to be read changes in the show-through state depending on the ink used, it is more preferable to have a configuration that can check the show-through state and set the table level value FT and the back level value RT. preferable.

  FIG. 4 shows an image processing apparatus 1B provided with a level value setting means that allows the operator to set a level value in consideration of the above points. The image processing apparatus 1B is controlled by the CPU 10B. In FIG. 4, the same components as those in the image processing apparatus shown in FIG. The image processing apparatus 1B shown in FIG. 4 includes an input device 15 serving as level value setting means for setting and inputting a level value by an operator, and a display device 16 for confirming the set level value. Here, the input device 15 is not particularly limited as long as it includes setting switching between the front level value FT and the back level value RT and a level change switch that can increase or decrease the level value. Similarly, the display device 16 may be a display that allows the operator to adjust the level value while viewing the level value, and is not particularly limited.

  FIG. 5 is a diagram showing a display example of the display device 16. This screen displays a sample image for setting the level value. FIG. 5 also shows a histogram and level values indicating the output corresponding to the image density. In the image diagram, the letter “F” reflects the front image, and the show-through letter “E”. The level change switch 15SW of the input device 15 is operated to arbitrarily set the table level value FT. For example, by operating the level change switch 15SW as shown in the figure, the level value is gradually changed while visually confirming with the display device 16 to delete the character “F” having a dark surface color. You can set the value. By performing such an operation, the above-described show-through process can be executed after an operator sets an optimum table level value. Therefore, a clearer image without show-through can be generated. The back level value RT may be set in the same manner. However, the back level value RT can also be set based on the front level value FT. Therefore, the back level value RT may be automatically set when the front level value FT is set.

(Other embodiments)
In the above-described embodiment, the image processing apparatuses 1A and 1B are arranged between the image reading apparatus 2 and the image output apparatus 3 so that an image without show-through can be output quickly. However, the embodiment is not limited to this. Further, another embodiment will be described with reference to the drawings.

  FIG. 6 shows a show-through image processing system including an image processing apparatus 1C configured to be connected to a computer 20 (hereinafter referred to as a PC 20). In FIG. 6 as well, the same components as those shown in FIG. The CPU 10C of the image processing apparatus 1C generates image data (hereinafter referred to as embedded image data) in which the above-described level value information is embedded in the image data as part of the metadata. Then, the embedded image data is supplied to the PC 20 via the output IF 14. A display device 21 and a printer device 22 are connected to the PC 20.

  A program for removing show-through is stored in advance in the storage device on the PC 20 side. This program uses the embedded image data supplied from the image processing apparatus 1C to remove unnecessary show-through images and obtain a surface image to be read. The algorithm of this program is the same as that for executing the mirror image inversion process, the first synthesis process by logical product (AND), and the second synthesis process by exclusive OR (XOR), which are described in detail in the previous embodiment. Should be set.

  FIG. 7 is a functional block diagram of the image processing apparatus 1C. The front surface image data input unit 111 and the back surface image data input unit 112 are realized by the input IF 13 in FIG. The image output unit 113 is realized by the output IF 14 of FIG. Other functions are mainly realized by the CPU 10C.

  However, in the example shown in FIG. 7, the embedded image data in which the CPU 10C of the image processing apparatus 1C embeds the level values on both the front and back sides so that an arbitrary surface can be selected (designated) as the reading surface on the PC 20 side that receives the image data. Is generated. That is, the CPU 10C functions as the deletion data embedding unit 121, and temporarily sets a table level value relating to the density of the image data of the surface to be the surface and embeds it so as to delete an image portion that exceeds this level value. The deleted image data (first image data) on the front surface is generated. Further, the CPU 10C functions as the extraction data embedding unit 122 to set the back level value related to the density and to extract the back side extracted image data (second image data) so as to delete the image portion that is equal to or lower than this level value. Is generated.

  Similarly, the CPU 10C is provided with means for processing the image data on the back side. In other words, the CPU 10C functions as the extraction data embedding unit 123 to set the back level value related to the density and generate the extracted image data of the back side embedded so as to delete the image portion that is equal to or lower than this level value. Further, it functions as the deletion data embedding means 124 to set a table level value related to the density for the image data, and to generate the deletion image data of the embedded surface so as to delete the image portion that exceeds the level value.

  As described above, the CPU 10C shown in FIG. 7 supplies the image data in which the deleted image data and the extracted image data are embedded to the PC 20 shown in FIG. As described above, the front level value for image deletion and the back level value for image extraction are set for both sides of the document. Therefore, on the PC 20 side, it is possible to generate an image of a surface for which an operator has designated an arbitrary surface as a reading target surface on the display device 21. At this time, on the PC 20 side, the program stored in the storage device can be activated to generate an image from which the show-through image is removed based on the image data from the CPU 10C.

  FIG. 8 is a flowchart showing an example of the show-through process executed by the PC 20. When the show-through is started, for example, an image based on the image data is displayed on the display device 21, and it is confirmed whether the surface of the target image is the surface image (read target image) here (S11). Thereafter, processing is performed based on a program stored in the PC 20. Since the show-through removal processing procedure (algorithm) executed by this program is the same as that described above, a duplicate description is omitted (see FIG. 3).

  The image data on the front side is subjected to the processing of steps S12 and S13. For the image data on the back side, the processes of steps S12, S14, and S15 are performed. Then, the first image composition process (S16) and the second image composition process (S17) are executed to generate image data from which show-through has been removed. Then, for example, the data is output to a sheet by the printer device 22 shown in FIG. 6 (S18), and this process ends.

  Description will be made with reference to FIG. 6 again. As shown by a broken line 25 in FIG. 6, a show-through image processing system in which the document reading (scanning) performed by the image reading device 2 and the operation of the image processing device 1 </ b> C is managed by the computer 20 may be constructed.

  6 to 8, the CPU 10C of the image processing apparatus 1C embeds deleted image data on both sides of the document so that an arbitrary surface can be set as a surface (reading target surface) later on the PC 20 side. The image data (first image data) and the image data (second image data) embedded with the extracted image data are generated. However, the present invention is not limited to this, and if the front surface and the back surface of the original to be read are clear, either the table level value for deletion or the back level value for extraction is set as the embedded image data reflecting each surface. Embedded embedded image data may be generated. Then, the embedded image data may be embedded together with the front and back information and supplied to the PC 20 side. An embedded image data embedding unit for a front image incorporating a front level value for deletion, an embedded image data embedding unit for a back image incorporating a back level value for extraction, and further embedding front and back information. The front / back information embedding means for this purpose may be realized by the CPU 10C.

  The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

1 is a block diagram illustrating a configuration of an image processing apparatus 1A according to an embodiment. It is a functional block diagram of image processing apparatus 1A shown in FIG. It is the schematic diagram which showed collectively the show-through removal process performed by CPU of 1 A of image processing apparatuses, (A) is the process about the surface made into reading object, (B) The process about a back surface, and removes show-through It is a figure which shows about the synthetic | combination process which forms the performed image. It is a figure showing about image processing device 1B provided with a means of level value setting. FIG. 5 is a diagram showing a display example of a display device of the image processing apparatus 1B shown in FIG. FIG. 1 is a diagram showing a show-through image processing system including an image processing apparatus 1C configured to be connected to a computer. It is a functional block diagram of image processing device 1C. It is the flowchart which showed an example of the show-through process performed by the computer.

Explanation of symbols

1 (1A to 1C) Image processing device 2 Image reading device 3 Image output device 5 Image forming device 10 (10A to 10C) CPU
13 Input interface (image input unit)
14 Output interface (image output unit)
20 computers

Claims (7)

An image input unit capable of inputting image data on the front side of the document to be read and the back side not to be read;
Surface image processing means for generating surface deletion image data by setting a table level value related to density for the surface image data and deleting an image portion that is equal to or higher than the table level value;
Back side image processing means for generating back side extraction image data in which a back level value related to density is set for the back side image data and an image portion that is equal to or lower than the back level value is deleted;
Mirror image generation means for generating mirror image data obtained by mirror-inversion of an image formed based on the back surface extraction image data;
First image synthesizing means for generating first synthesized data specifying the show-through image by synthesizing the surface-deleted image data and the mirror image data by logical product;
A second image synthesizing unit that synthesizes the surface image data and the first synthesized data by exclusive OR, and generates second synthesized data specifying a table image to be read; An image processing apparatus. The image processing apparatus according to claim 1, further comprising level value setting means capable of arbitrarily setting at least one of the front level value and the back level value. The image processing apparatus according to claim 1 or 2,
An image reading device for reading the images drawn on both sides of the document and generating the image data to be input to the image input unit;
An image forming apparatus comprising: an image output device that outputs an image based on the second synthesized data generated by the second synthesizing unit. Obtaining image data for each of the front and back sides of the document;
A step of setting a table level value related to the density for the surface image data to be read and generating a surface deleted image data by deleting an image portion that is equal to or higher than the table level value;
A back-level value related to density is set for back-side image data that is not to be read, and back-side deleted image data is generated by deleting an image portion that is less than or equal to the back-level value, and the image based on the back-side deleted image data is further mirror-inverted. Generating mirror image data,
Generating the first composite data specifying the show-through image by combining the surface deletion image data and the mirror image data with a logical product;
An image processing method comprising: synthesizing the surface image data and the first synthesized data by exclusive OR, and generating second synthesized data specifying a table image to be read. . An image input unit capable of inputting image data on the front side of the document to be read and the back side not to be read;
Front and back information embedding means for embedding front and back information of the image data;
A deletion data embedding means for generating table image data in which deletion image data is embedded in order to delete a portion of an image that is greater than or equal to the table level value by setting a table level value relating to the surface image data;
Extraction data embedding means for generating back image data in which the back image data for embedding the extracted image data for setting the back level value related to the density and deleting the image portion that is equal to or less than the back level value is set for the back surface image data. An image processing apparatus. An image input unit capable of inputting image data of both sides of the document;
Deletion data embedding means for generating first image data in which deletion image data is embedded in order to delete a part of an image that is higher than the level value by setting a table level value relating to the density for both image data;
Extracted data embedding means for generating second image data in which extracted image data for setting a back level value related to density and deleting an image portion that is equal to or lower than the back level value is embedded for both image data An image processing apparatus comprising: An image processing apparatus according to claim 5 or 6, and a computer that generates an image from which show-through has been removed based on the image data acquired from the image processing apparatus,
The computer performs a mirror image reversal process on an image formed based on the image data, a first composition process for specifying a show-through image, and a second composition process for specifying a front image to generate an image with show-through removed. A show-through image processing system characterized by that.

Images