JP3052728B2 - Image trimming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image trimming apparatus and, more particularly, to an image trimming apparatus for judging whether or not a photo original for printing is correctly arranged at a designated trimming position on a layout sheet (atari image). .

[0002]

2. Description of the Related Art In a plate making process, when laying out a photo original, a trimming operation of the photo original is required. In recent years, this trimming operation has often been performed using an image trimming apparatus formed of a computer system. In this apparatus, first, an operator uses a trimming frame (Atarikei) indicating a trimming position of a photo original and a layout paper on which an Atari image indicating an outline of a picture pattern of the photo original is drawn.
Each of the Atari image and the photo original is read by a scanner or the like, and the read image is taken into a trimming device.

An operator superimposes an image of a photo document and an Atari image, which are separately read by a color separation scanner on a display, and matches the outline of the person of the photo document with the Atari image, thereby displaying the image on the photo document. Is to determine the position of the trimming frame. Therefore, in order to perform trimming with high accuracy, it is necessary to accurately position the original image and the Atari image.

[0004]

However, since the deviation between the outline of the original image and the position of the Atari image is very small, it is extremely difficult to accurately grasp the deviation with the naked eye. For this reason, in the conventional image trimming device,
There has been a problem that it is difficult to perform accurate trimming efficiently. Therefore, the applicant of the present application has devised an image trimming device capable of determining whether or not trimming has been performed with high accuracy (Japanese Patent Application No. 5-25372).
2).

However, in this image trimming apparatus, it is necessary for the operator to find a point on the display where the addition value is maximum (the contour of the original image matches the Atari image) while operating the mouse or the like. For this reason, the operator is forced to perform complicated operations, and it is difficult to perform accurate trimming in a short time.

[0006]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to automatically and quickly perform a trimming operation with high accuracy while displaying a positional shift between a document image and an Atari image.

[0007]

According to a first aspect of the present invention, there is provided an image trimming apparatus, comprising: original image data input means for inputting original image data representing an original image; and trimming frame data indicating a trimming range of the original image. Frame data input means for inputting an image, an Atari image data input means for inputting an Atari image data of an Atari image representing a contour of a picture of a document image in the trimming frame, and an original image, a trimming frame, and an Atari image can be displayed. An image trimming device that determines the position of the trimming frame on the original image by superimposing the display of the Atari image and the original image on the display unit. Differentiating means for calculating the product of the absolute value of the differential data and the above-mentioned Atari image data And adding data calculation means for calculating the sum data obtained by following the addition, and having an image trimming apparatus, wherein the above display means for displaying the added data.

According to a second aspect of the present invention, as shown in FIG. 1, original image data input means 1 for inputting original image data representing an original image and trimming frame data indicating a trimming range of the original image are inputted. Frame data input means 2 for inputting, Atari image data input means 3 for inputting Atari image data of an Atari image representing a contour of a picture of a document image in the trimming frame, and an original image, a trimming frame, and an Atari image can be displayed. Display means 4,
An image trimming device that determines the position of a trimming frame on the original image by superimposing the display of the Atari image and the original image on the display unit 4; and a differentiating unit 5 that calculates differential data of the original image data. Addition data calculating means 6 for calculating addition data by sequentially adding the product of the absolute value of the differential data and the above-mentioned Atari image data, and calculating addition data by sequentially adding the product of the absolute value of the differential data and the above-mentioned Atari image data And an addition data calculation means 7 for displaying the addition data. The display means 4 displays the addition data.

According to a third aspect of the present invention, the addition data calculating means according to any one of the first and second aspects is characterized in that the addition data calculating means calculates the product of the binarized differential data and the binarized Atari image data. The image trimming device according to claim 1, wherein the sum is calculated.

According to a fourth aspect of the present invention, the differentiating means according to the first or second aspect calculates differential data of mask image data representing a cut-out area of the original image. Item 3. The image trimming device according to Item 1.

[0011]

In the image trimming apparatus according to the first aspect of the present invention, the original image data input means inputs original image data representing an original image such as a photographic original, and the trimming frame data input means sets the trimming range of the original image. Input the trimming frame data shown. The Atari image data input means inputs Atari image data representing a contour of a picture of a document image in the trimming frame. These original image, trimming frame, and Atari image are displayed on the display unit.

The differentiating means performs a differential operation on the input document image data to calculate differential data. The addition data calculation means sequentially adds the product of the absolute value of the differential data and the Atari image data to calculate addition data. This addition data is displayed by the display means. The operator arranges the trimming frame so that the Atari image overlaps the document image while watching the original image, the Atari image, and the trimming frame displayed on the display unit.

When the Atari image overlaps the outline of the original image, that is, when the trimming frame is correctly arranged on the original image, the value of the added data indicates the maximum value. On the other hand, when the Atari image is displaced from the contour line of the document image, that is, when the trimming frame is not accurately arranged on the document image, the value of the addition data becomes small. By referring to the value of the output addition data, the operator can accurately determine whether the Atari image and the outline of the document image overlap each other. Therefore, the trimming frame can be accurately arranged on the document image, and the trimming operation can be performed accurately and quickly.

According to a second aspect of the present invention, the differentiating means performs a differential operation on the input document image data to calculate differential data. The addition data calculation means sequentially adds the product of the absolute value of the differential data and the Atari image data to calculate addition data. Then, the maximum value calculating means automatically finds the maximum value of the added data, and the display means displays the position of the trimming frame on the document image when the added data has the maximum value. Therefore, according to the present invention, the position of the trimming frame on the document image can be automatically obtained, and the workload of the operator can be greatly reduced.

In the image trimming apparatus according to a third aspect of the present invention, the integrating means calculates a product of the binarized differential data and the binarized Atari image data.
Since the operation between the binarized data can be executed at high speed, the processing time of the entire image trimming apparatus can be reduced.

In the image trimming apparatus according to the present invention, the differentiating means calculates differential data of mask image data representing a cutout area of the original image. By using the mask data, it is possible to easily obtain the outline of the original image.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an external view of an image trimming apparatus according to the first embodiment of the present invention. The main body 21 is a so-called CP
It is composed of a main frame including a U and the like, and performs arithmetic processing and storage of images. Display 22 is CR
In addition to displaying a document image, an Atari image, and a trimming frame, the addition data described later is displayed as the accuracy of the trimming position. The hard disk unit 23 stores document image data, Atari image data, application programs, and the like. The scanner 24 is of a flatbed type, and reads an image drawn on a photo original or layout paper as digital data. The keyboard 25 is the main body 2
1 for inputting a command or the like. Mouse 2
Reference numeral 6 denotes a device for moving a cursor on the display 22, which allows command input and line drawing input.

FIG. 3 is a functional block diagram of the image trimming apparatus. The scanner 24 connected to the main body 21 reads a trimming frame and an Atari image drawn on the layout paper 41 shown in FIG. 4 and outputs the trimming frame data and the Atari image data to the main body 21. The scanner 24 also has a function of reading a photo document and outputting document data to the main body 21.
The mouse 26 and the digitizer 27 can also be used to input trimming frame data and Atari image data.

The original image data is a photographic original (original image)
Is read by the scanner 24, and Y (yellow), M
(Magenta), C (cyan), and K (black) in four primary colors. 8 bits of data for each color
Are represented. The document image data may be represented by three primary colors of R (red), G (green), and B (blue).

The trimming frame data indicates a trimming range (trimming frame) of the original image, and is composed of data representing a line image. For example, as shown in FIG. 5, data representing a trimming frame 51 to be used as a print document in a document image 50 representing landscape is trimming frame data. The trimming frame is not limited to a rectangle but may be a circle or the like.

The Atari image data is data representing an Atari image obtained by tracing a picture of a document image in a trimming frame. For example, as shown in FIG. 5, among the patterns of the original image 50, an outline image 52 that represents the outline of the pattern within the trimming frame 51 is the Atari image 52. The trimming frame data and the Atari image data are linked. When trimming the original image later, the operator looks at the display 22 and adjusts the position of the trimming frame 51 so that the Atari image 52 overlaps the original image 50. By determining, trimming can be performed accurately.

The original image data is input to the differentiating means 211 in FIG. The differentiating means 211 is for differentiating the original image data and calculating the differential data.
That is, a high-frequency component (contour line) of the document image is extracted by the differential operation of the document image data. Differentiation of the document image data is performed by using 3 × 3 matrices 61 and 62 illustrated in FIG. The matrix 61 is for differentiating the original image in the x-axis direction (horizontal direction), and the matrix 62 is for performing the differentiation in the y-axis direction (vertical direction). That is, for all pixels of the document image data, the matrix 61,
By multiplying by 62, differential calculation in both the x-axis and y-axis directions is performed.

For example, it is assumed that the luminance distribution in the x-axis direction of a certain portion of the original image data is a graph 71 in FIG. The horizontal axis of the graph 71 represents the x-axis, and the vertical axis represents the luminance L. X represents each pixel of the document image data represented by the graph 71.
By performing multiplication by sequentially multiplying the matrix 61 in the axial direction, differential data ΔL of a graph 72 in FIG. As can be confirmed from the graph 72, the differential data ΔL has a positive value at the rising portion of the graph 71, and the differential data ΔL has a negative value at the falling portion of the graph 72.

The absolute value calculating means 212 calculates the differential data ΔL
By calculating the absolute value of the contour line image data | ΔL
| Is calculated. The contour data | ΔL | obtained in this way represents the contour of the document image. The contour line data | ΔL |, which is the absolute value of the differential data ΔL in the graph 72, is as shown in a graph 73 in FIG.

The binarizing means 215 binarizes the multi-valued Atari image data with a predetermined threshold value. The integrating means 213 calculates integrated data representing the product of the binarized Atari image data and the contour line data | ΔL |. That is, of the binarized Atari image data and the contour line data | ΔL |, the product of the product of the pixel data at the same coordinates is the integrated data. The adding means 214 calculates the added data by sequentially adding the integrated data of each pixel.

For example, graph 121 and graph 1 in FIG.
As shown in FIG. 22, it is assumed that the Atari image and the contour line of the document image overlap each other. Here, the graph 121 represents the outline data | ΔL |
Represents binarized Atari image data. In this case, since the integration of the line drawing part (the part having the value “1”) of the binarized Atari image data and the outline part of the outline data | ΔL | is performed, the integrated data and the addition The data value indicates the maximum value. On the other hand, a graph 123 in FIG.
It is assumed that the Atari image and the contour line of the document image are overlapped as shown in FIG. Here, the graph 23 represents the contour line data | ΔL | of the document image, and the graph 124 represents the binarized Atari image data. In this case, the line drawing portion (the value is “1”) of the binarized Atari image data and the contour line data | ΔL |
Since the integration with the portion having a low value is performed, the values of the integrated data and the added data are reduced.

The maximum value calculating means 217 includes an adding means 214
The trimming coordinates (position) at which the added data calculated by (1) becomes the maximum (the contour lines of the Atari image and the document image overlap) are automatically calculated. Note that the operator may use the mouse 26 or the like to indicate the approximate trimming position to the maximum value calculating unit 217. Accordingly, the maximum value calculating unit 217 can calculate the coordinate at which the addition data becomes maximum centering on the designated position, so that the trimming position can be searched for in a short time.

The display control means 216 is constituted by a video RAM, a display controller, and the like, and controls the display of the original image, the addition data, the Atari image, the trimming frame, and the like on the display 22. That is,
A video signal is generated based on document image data, addition data, Atari image data, and trimming frame data, and is output to the display 22. The operator can accurately determine the position of the trimming frame by determining the position of the Atari image on the document image so that the value of the addition data displayed on the display indicates the maximum value, thereby enabling accurate trimming. And can be done quickly. Further, the display control means 216 is the maximum value calculation means 2.
The coordinates of the trimming frame obtained by step 17 are displayed. The operator can grasp whether or not the trimming has been correctly performed while watching these displays.

Next, the operation of the image trimming apparatus according to this embodiment will be described.

First, the operator sets a photo original on the scanner 24 and gives a predetermined command to the image trimming device. Then, the scanner 24 reads the photo original,
The document image data is output to the image trimming device. Similarly, the Atari image and the trimming frame drawn on the layout paper are read by the scanner 24, and the Atari image data and the layout frame data are output. As described above, the Atari image data and the layout frame data are read by the digitizer 2 while the operator looks at the display 22.
7. It is also possible to input using the mouse 26.

When document image data, Atari image data, and trimming frame data are input to the image trimming device,
The display control means 216 displays a document image on the display 22,
Display Atari image and trimming frame. The operator
By operating the mouse 26 and the like, the display 22 is displayed.
This is for changing the positions of the Atari image, the trimming frame and the like in the above. The differentiating means 211 performs a differential operation on the document image data to calculate differential data ΔL. Then, the absolute value calculation means 212 calculates the absolute value of the differential data ΔL, and generates contour line data | ΔL |. The outline data | ΔL | based on the image data 50 in FIG. 5 represents the outline of the original image as shown in the outline image 80 in FIG.

Next, the integrating means 213 is provided with a binarizing means 215
, The integrated data representing the product of the binarized Atari image data and the multi-valued outline data | ΔL |, and the adding means 214 sequentially adds the integrated data. The processing in the integrating means 213 and the adding means 214 will be described with reference to the flowchart in FIG. 11, and FIGS. 9 and 10.

FIGS. 9 and 10 show a contour image 80, an Atari image 92, and a trimming frame 91. FIG. Here, each data of the contour line image 80 and the Atari image 92 in the trimming frame 91 is composed of m × n pixels, the upper left coordinate of the trimming frame 91 is (0, 0), and the lower right coordinate is (m,
n). Then, an arbitrary pixel in the outline data | ΔL | is expressed as | ΔL | (i, j), and an arbitrary pixel in the Atari image data is expressed as h (i, j). Here, the range of the variables i, j is 0 ≦ i ≦ m, 0 ≦ j
≤n. The integrating means 213 and the adding means 214 perform the processing shown in the flowchart of FIG. 11 based on these data.

First, the integrating means 213 and the adding means 21
4 initializes the variable SUM representing the addition data and the variables i and j described above to "0" (steps S111 to S1).
13). The integrating means 213 outputs the contour data | ΔL | (0,
0) and the Atari image data h (0, 0) are calculated,
The adding means 214 adds this product value to the added data SUM (step S114). That is, contour line data | ΔL
| And the product of the pixel of the Atari image data on the same coordinates as this pixel are sequentially added.

Subsequently, the integrating means 213 increments the variable j (step S115), and determines whether or not the variable j is larger than m (step S116). At this time, since the variable j = 0, the determination result of step S116 is NO, and the process returns to step S114. In this way, until the variable j becomes larger than m (step S1).
16 (YES), the processing of steps S114 to S116 is repeatedly executed.

When the variable j is larger than m (step S
If YES in step 116, the variable i is incremented (step S117). It is determined whether or not the variable i is greater than n (step S118). If the result of the determination is NO, the process returns to step S113. And the variable i is n
Until it is greater than (YES in step S118).
Steps S113 to S118 are repeatedly executed.

As a result, the products of the pixels of the contour data | ΔL | and the pixels of the Atari image data are sequentially added, and the addition data SUM is calculated. The display control means 216 displays the addition data SUM on the display 22 (not shown). When the contour of the Atari image overlaps the contour of the original image, the value of the addition data becomes maximum as described above. By referring to the value of the added data, the operator can determine whether the Atari image and the document image overlap, that is, whether the trimming frame is correctly placed on the document image. Become. Therefore, the trimming operation can be performed with high accuracy and speed.

Subsequently, referring to FIGS. 15 and 16,
The processing in the maximum value coordinate calculation means 217 will be described. The flowchart in FIG. 15 illustrates a process for automatically calculating the trimming position.

First, the maximum value coordinate calculation means 217 sets the initial value of the variable MAX to "0" (step S150).
1). This variable MAX is a variable for finding the maximum value of the addition data. Then, the operator uses the mouse 26 or the like to indicate the approximate trimming coordinates (x, y) on the display 22 (FIG. 16). Or later,
The maximum value calculation means 217 calculates (x−Δx, x−Δy) − (x + Δx, y) with the designated coordinates (x, y) as the center.
(+ Δy) to find a trimming position where the added data is maximum (steps S1502 to S151)
1). That is, the maximum value calculating means 217 calculates the variables i, j
Are set to x−Δx and y−Δy, respectively (steps S1502 and S1503), and the value of the added data SUM is calculated (step S1504). Addition data SUM
Is calculated according to the flowchart of FIG. 11 described above.

Next, the maximum value calculating means 217 determines whether or not the addition data SUM is larger than the variable MAX (step S1505). At this time, since the variable MAX = 0, the result of the determination is YES. Therefore, the addition data MAX is substituted for the variable MAX, the variable i is substituted for the variable MAX_X, and the variable j is substituted for the variable MAX_Y (step S1506). Then, the maximum value calculating means 21
7 increments the variable j (step S150)
7) If the variable j is equal to or smaller than x + Δx (step S1)
(NO at 508), the process returns to step S1504. Then, until the variable j reaches x + Δx (step S150)
8), the processes of steps S1504 to S1508 are repeatedly executed. Further, while incrementing the variable i (step S1509), until the variable i reaches y + Δy (YES in step S1510), the process proceeds to step S15.
The processing of 1502 to S1510 is repeatedly executed.

As described above, (x-Δx, x
In the range of -Δy)-(x + Δx, y + Δy), the addition data SUM having a larger value is substituted for the variable MAX (step S1506). Thereby, (x−Δx,
x−Δy) − (x + Δx, y + Δy)
The maximum value of addition data SUM is substituted for variable MAX.
The variable MAX and the X coordinate MAX_ thus obtained
The X and Y coordinates MAX_Y are displayed on the display 22 (step S1511). The X-coordinate MAX_X and the Y-coordinate MAX_Y represent trimming coordinates at which the addition data SUM is maximum. The operator operates the display 22
MAX, X coordinate MAX_X, Y coordinate M displayed in
By looking at AX_Y, the trimming coordinates can be grasped.

With the above processing, the trimming coordinates can be automatically obtained, and the work load on the operator can be reduced. Further, by giving the approximate trimming position to the maximum value calculating means 217, the trimming coordinates can be obtained in a short time.

FIG. 13 illustrates an image trimming apparatus according to a second embodiment of the present invention. The image trimming apparatus according to the second embodiment performs the contour line data | ΔL |
Is different from the image trimming apparatus according to the first embodiment in which the contour line data | ΔL | Other configurations and operations are the same as those of the image trimming device according to the first embodiment.

The graph 131 shown in FIG.
|, Graph 132 represents binarized contour data, and graph 133 represents Atari image data. Graph 131
By binarizing the outline data | ΔL | with a predetermined threshold value, the binarized outline data of the graph 132 is obtained. The product of the graph 133 and the Atari image data is performed based on the binarized contour data.
The Atari image data is also binarized, and since the product of the binarized data can be executed in a short time, the calculation time in the main body 21 can be significantly reduced. is there. Further, the maximum value calculating means 217
By automatically calculating the trimming coordinates, it is possible to greatly reduce the work load on the operator.

FIG. 14 illustrates an image trimming apparatus according to a third embodiment of the present invention. The image trimming device according to the third embodiment performs the contour line data | ΔL |
Is different from the image trimming apparatus according to the first embodiment in which the contour line data | ΔL | is generated based on the original image data. Other configurations and operations are the same as those of the image trimming device according to the first embodiment.

The graph 141 in FIG. 11 represents the mask image data. The mask image data is data representing a mask image used to cut out a desired picture of a document image, and is composed of binary data indicating a picture area to be cut out. Therefore, by differentiating the mask image data by the differentiating means 211, it is possible to obtain data representing the outline of the picture of the original image. The differential data of the mask image data is shown in the graph 1 in FIG.
42. The absolute value of the differential data calculated by the absolute value calculating means 212 is the data shown in the graph 143. Then, the graph 14 is calculated by the integrating means 213.
The addition data is obtained by calculating the product of the data representing the number 3 and the Atari image data shown in the graph 144, and calculating the sum of the products by the adding means 214. In addition, the trimming coordinates can be automatically calculated by the maximum value calculating means 217, and the work load of the operator can be greatly reduced.

[0048]

As described above, according to the present invention, the position shift between the Atari image and the original image is displayed as the value of the added data, so that the trimming operation can be performed accurately and quickly. Becomes Further, by automatically obtaining the trimming coordinates at which the added data becomes the maximum, it is possible to greatly reduce the work load of the operator.

[Brief description of the drawings]

FIG. 1 is a diagram showing an image trimming apparatus according to a second aspect of the present invention.

FIG. 2 is an external view of the image trimming apparatus according to the first embodiment of the present invention.

FIG. 3 is a functional block diagram of the image trimming device according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a layout sheet according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating a document image, an Atari image, and a trimming frame according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a matrix for differential operation according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating document image data, differential data, and contour data according to the first embodiment of the present invention.

FIG. 8 is a diagram illustrating a contour line of a document image according to the first embodiment of the present invention.

FIG. 9 shows a contour line of a document image according to the first embodiment of the present invention;
It is a figure showing an Atari image and a trimming frame.

FIG. 10 is a diagram illustrating a contour line, an Atari image, and a trimming frame of a document image according to the first embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the integrating means and the adding means according to the first embodiment of the present invention.

FIG. 12 is a diagram showing contour line data and Atari image data according to the first embodiment of the present invention.

FIG. 13 is a diagram for explaining an image trimming device according to a second embodiment of the present invention.

FIG. 14 is a diagram for explaining an image trimming device according to a third embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the maximum value calculating means according to the first embodiment of the present invention.

FIG. 16 is a diagram for explaining the operation of the maximum value calculating means according to the first embodiment of the present invention.

[Explanation of symbols]

22 display (display means) 24 scanner (document image data input means, trimming frame data input means, Atari image data input means) 26 mouse (trimming frame data input means, Atari image data input means) 27 digitizer (trimming frame data input means) , Atari image data input means) 211 Differentiating means 212 Absolute value calculating means (Additional data calculating means) 213 Integrating means (Additional data calculating means) 214 Adding means (Additional data calculating means) 216 Display control means (Display means) 217 Maximum value Calculation means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 1/38-1/387 G03F 1/00 G06T 3/00-3/20 G06T 7/00

Claims (4)

(57) [Claims] 1. An original image data input means for inputting original image data representing an original image, a trimming frame data input means for inputting trimming frame data indicating a trimming range of the original image, and a pattern of the original image in the trimming frame Atari image data input means for inputting Atari image data of the Atari image representing the outline of the document, and display means capable of displaying the original image, trimming frame, Atari image, and each of the Atari image and the original image on the display means An image trimming device that determines the position of the trimming frame on the original image by superimposing the display of the original image data; a differentiating means for calculating differential data of the original image data; and an absolute value of the differential data and the Atari image data. Means for calculating addition data obtained by sequentially adding the products. Together, image trimming apparatus, wherein the above display means for displaying the added data. 2. An original image data input unit for inputting original image data representing an original image, a trimming frame data input unit for inputting trimming frame data indicating a trimming range of the original image, and a pattern of the original image in the trimming frame. Atari image data input means for inputting Atari image data of the Atari image representing the outline of the document, and display means capable of displaying the original image, trimming frame, Atari image, and each of the Atari image and the original image on the display means An image trimming device that determines the position of the trimming frame on the original image by superimposing the display of the original image data; a differentiating means for calculating differential data of the original image data; and an absolute value of the differential data and the Atari image data. Addition data calculation means for calculating addition data obtained by sequentially adding the products; A maximum value calculating means for obtaining a maximum value of the data, wherein the display means displays a position of a trimming frame on the original image when the added data is maximum. . 3. The addition data calculation means according to claim 1, wherein the addition data calculation means calculates a sum of products of the binarized differential data and the binarized Atari image data. The image trimming device according to claim 1 or 2, wherein 4. The differential means according to claim 1, wherein said differential means calculates differential data of mask image data representing a cut-out area of a document image. An image trimming apparatus as described in the above.