JP3591049B2 - Automatic magnification angle setting device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an automatic magnification angle determining device for obtaining a magnification and a rotation angle when a photo document is disassembled, for example.
[0002]
[Prior art]
When making a photoengraving, as shown in FIG. 10, a document frame for pasting a photo on a layout designation sheet is described, and the magnification and rotation angle of the photo pasted on the document frame are measured in advance.
[0003]
For measuring the magnification and the rotation angle, a magnification angle measuring machine is used. The magnification angle measuring device projects a photo original (for example, a positive film) onto a layout sheet and measures the magnification and rotation angle of the photo document when the projected image matches the document frame on the layout sheet. It has become.
[0004]
The scaling ratio and the rotation angle of these photo originals are input as parameters to an image reading scanner at the time of image input.
The scanner reads a photo document in accordance with the magnification and rotation angle of the photo document and obtains this as digital print image data.
[0005]
[Problems to be solved by the invention]
However, by measuring the magnification and the rotation angle of the photographic original using a magnification angle measuring machine and inputting these magnification and the rotation angle to the scanner, the magnification and the rotation angle are measured through an operator, In addition, since these are input to the scanner, the burden on the worker is large and the work efficiency is reduced.
[0006]
In addition, even in the case of a layout designated sheet with a very simple layout designation, it is necessary to measure the magnification and the rotation angle of the photographic document via a worker using a magnification angle measuring machine.
[0007]
Further, since the operator inputs the magnification and the rotation angle to the scanner via the operator, an instruction input error may occur.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic magnification angle setting device that can automatically determine the magnification and rotation angle of a photographic document and reduce the work load.
[0008]
Another object of the present invention is to provide an automatic magnification and angle setting device capable of automatically determining the magnification and rotation angle of a photo original to reduce the work load and preventing erroneous designation of the magnification and rotation angle. And
[0009]
[Means for Solving the Problems]
According to the first aspect, the layout designation sheet is read, the size and inclination of the document frame on the layout designation sheet are detected, and the edge of the subject image is extracted from the rapid change of the gray level in the document image data obtained by reading the document. And a function of obtaining at least the height of the subject image and the inclination of the edge with respect to a temporary horizontal line. Then, an automatic magnification angle setting device is characterized in that a magnification and a rotation angle of a subject image matching a document frame are obtained based on the detected edge position and inclination of the subject image.
[0010]
According to the second aspect, the layout designation sheet is read, the size and inclination of the document frame on the layout designation sheet are detected, and the dimensions of the edges in the document image data obtained by reading the document and the edges of the various original documents held in advance are determined. The type of the document is determined by comparing the size with the dimensions, the edge of the subject image is detected from the sudden change in the gray level in the determined document image data, and at least the height of the subject image and the inclination of the edge with respect to the temporary horizontal line are determined. It has a function to obtain. Then, an automatic magnification angle setting device is characterized in that a magnification and a rotation angle of a subject image matching a document frame are obtained based on the detected edge position and inclination of the subject image.
[0011]
According to the third aspect of the present invention, the function of reading the layout designation sheet, performing horizontal alignment from the plate-making registration mark on the image data of the layout designation sheet, and subsequently detecting at least the height of the document frame and the inclination with respect to the horizontal on the layout designation sheet. Having. Then, the type of the original is determined by comparing the size of the edge of the original image data obtained by reading the original with the size of the edge of the various types of original document held in advance. It has a function of extracting an edge of a subject image and obtaining at least the height of the subject image and the inclination of the edge with respect to a temporary horizontal line. Then, a function of multiplying the rough ratio by the ratio of the detected height of the document frame to the height of the subject image to obtain a scaling factor, and setting the tilt of the subject image to the rotation angle in accordance with the tilt of the document frame. An automatic magnification angle setting device characterized by having:
[0012]
According to the fourth aspect, the edge detecting means has a function of extracting an edge of the subject image from a sudden change in the shading level in the document image data, and obtaining at least the height of the subject image and an inclination of the edge with respect to a temporary horizontal line. It is an automatic magnification angle setting device.
[0013]
According to the fifth aspect, the edge detecting means is an automatic magnification and angle setting device that previously holds edge dimensions corresponding to various types of originals and compares the dimensions with the dimensions to determine the type of the original. According to the sixth aspect, the magnification angle calculation means obtains the magnification by multiplying the ratio of the height of the document frame detected by the parameter detection means to the height of the subject image obtained by the edge detection means by the rough magnification. And an automatic magnification angle setting device having a function of setting the inclination of the subject image obtained by the edge detection means to the rotation angle in accordance with the inclination of the document frame detected by the parameter detection means.
[0014]
According to the seventh aspect, the function of reading the layout designation sheet, performing horizontal alignment from the plate-making registration mark on the image data of the layout designation sheet, and thereafter detecting at least the height of the document frame and the inclination with respect to the horizontal on the layout designation sheet. Parameter detection means having
The type of the document is determined by comparing the size of the edge of the document image data obtained by reading the document with the size of the edge of each of the various types of documents stored in advance, and the subject is determined from the sudden change in the gray level in the determined document image data. Edge detection means having a function of extracting an edge of the image, and obtaining at least the height of the subject image, and a slope of the edge with respect to a temporary horizontal line;
The ratio between the height of the document frame detected by the parameter detection means and the height of the subject image obtained by the edge detection means is multiplied by the rough magnification to obtain a scaling factor, and the inclination of the subject image obtained by the edge detection means Magnification angle calculation means having a function of setting the rotation angle in accordance with the inclination of the document frame detected by the parameter detection means,
And an automatic magnification angle setting device for achieving the above object.
[0015]
[Action]
According to the first aspect , the layout specifying paper is read by the parameter detecting means to detect the size and inclination of the document frame, and the edge of the subject image in the document image data obtained by reading the document by the edge detecting means. Based on the detected and detected edge position of the subject image detected by the edge detecting means, the magnification angle calculating means obtains the magnification and the rotation angle of the subject image matching the document frame . In the edge detecting means, an edge of the subject image is extracted from a sudden change in the gray level of the document image data, and at least the height of the subject image whose boundary is clearly defined by the edge and the inclination of the edge with respect to the temporary horizontal line are determined. obtain. Thus, the work load can be reduced by automatically obtaining the magnification and rotation angle of the photo document.
[0016]
According to the second aspect, the type of the original is determined by comparing the size of the edge in the original image data obtained by reading the original with the green size of the various types of original stored in advance, and the position of the edge of the original is determined. Make a hit. Then, the edge of the subject image is extracted from the sharp change in the shading level in the determined document image data, and at least the height of the subject image and the inclination of the edge with respect to the temporary horizontal line are obtained. Then, based on the edge position of the subject image detected by the edge detecting means, the magnification and angle calculating means obtains the magnification and the rotation angle of the subject image matching the document frame. Thus, the work load can be reduced by automatically obtaining the magnification and rotation angle of the photo document.
[0017]
According to the third aspect, the layout designation paper is read, horizontal leveling is performed from the plate-making registration marks on the image data, and at least the height of the document frame and the inclination with respect to the horizontal are detected based on the horizontal, and the document is read together therewith. The type of the original is determined by comparing the size of the edge of the obtained original image data with the size of the edge of each of the various types of previously stored originals. And at least the height of the subject image and the inclination of the edge with respect to the temporary horizontal line are obtained. Then, the ratio between the height of the document frame and the height of the subject image is multiplied by the rough magnification to obtain a scaling factor, and the tilt of the subject image is set to the rotation angle in accordance with the tilt of the document frame. Thus, the work load can be reduced by automatically obtaining the magnification and the rotation angle of the photo document.
[0018]
According to the fourth aspect, the edge of the subject image is extracted from the sharp change in the gray level of the original image data by the edge detecting means, and at least the height of the subject image and the temporary horizontal line of the edge are clearly defined by the edge. Obtain the slope for.
[0019]
According to the fifth aspect, the type of the original is discriminated by comparing the size of the edge corresponding to the various originals held in advance by the edge detecting means with the size of the subject image in the original image data.
[0020]
According to the sixth aspect, the magnification angle calculating means multiplies the ratio between the height of the document frame and the height of the subject image by the rough magnification to obtain a scaling factor, and rotates the subject image in accordance with the tilt of the document frame. Angle.
[0021]
According to the seventh aspect, the layout designation paper is read, horizontal leveling is performed from the register mark on the image data, and at least the height of the document frame and the inclination with respect to the horizontal are detected based on the horizontal, and the document is read together therewith. The type of the original is determined by comparing the size of the edge of the obtained original image data with the size of the edge of each of the various types of previously stored originals. And at least the height of the subject image and the inclination of the edge with respect to the temporary horizontal line are obtained. Then, the ratio between the height of the document frame and the height of the subject image is multiplied by the rough magnification to obtain a scaling factor, and the tilt of the subject image is set to the rotation angle in accordance with the tilt of the document frame.
[0022]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram of an automatic magnification angle setting device.
The layout scanner 10 is a simple planar scanner that reads a layout designation sheet 11 and outputs the layout image data.
[0023]
The document scanner 12 is a high quality flat scanner, and reads a photo document 13, for example, 35 mm film, Broni, 4 × 5, and outputs the document image data.
[0024]
On the other hand, a keyboard 19 or a mouse and a monitor CRT display 20 are connected to the main control unit 14 via a program memory 15, storage devices 16 and 17, and an input unit 18.
[0025]
Each of the storage devices 16 and 17 stores image data output from the layout scanner 10 and the document scanner 12, respectively.
The main control section 14 controls the entire apparatus as a whole, issues respective commands according to the magnification angle setting flowchart of FIG. 2 stored in the program memory 15, and executes a parameter detection means 20, an edge detection means 30, and a magnification angle calculation. The unit 40 has a function to operate.
[0026]
The parameter detecting means 20 has a function of reading the layout image data stored in the storage device 16 and detecting the size and inclination of the document frame on the layout designation paper 11 on the layout image data. It has the functions of an output unit 21, an image cutout unit 22, a document frame detection unit 23, and a parameter calculation unit 24.
[0027]
The leveling unit 21 has a function of detecting each plate-making registration mark of the layout designation paper 11 on the layout image data, performing horizontal loading from these plate-making registration marks, and setting the horizontal and vertical directions of the layout designation paper 11. .
[0028]
The image cutout unit 22 has a function of cutting out the image data of the area matching the original frame from the layout image data when the area corresponding to the original frame of the layout designation paper 11 in the photo original 13 is designated and input from the keyboard 19. Have.
[0029]
The document frame detection unit 23 has a function of detecting the density level of the allocated image data and detecting the document frame on the layout designation sheet 11 from a position where the density level decreases. The parameter calculation unit 24 has a function of detecting the height, width, and inclination of the document frame detected by the document frame detection unit 23 with respect to the horizontal.
[0030]
On the other hand, the edge detecting means 30 has a function of detecting an edge of a subject image in document image data obtained by reading the photo document 13, and specifically includes a document discriminating unit 31, an edge extracting unit 32, and a tilt calculating unit. Each function of the unit 33 is provided.
[0031]
The document discrimination unit 31 has a function of reading document image data and discriminating the type of the photo document 13, for example, 35 mm photographic film, brownie, or 4 × 5.
3A to 3C show 35 mm photographic film, brownie, and 4 × 5 photographic originals 13 respectively. These photo originals 13 have black edges 13a to 13c, respectively. The dimensions of the black edges 13 a to 13 c are different for each type of the photo document 13.
[0032]
Therefore, the document discriminating unit 31 previously holds the dimensions a1 to a3 and b1 to b3 of the black edges 13a to 13c for each type of the photo document 13, discriminates the type of the photo document 13 from these dimensions, and It has the function of giving the edge position.
[0033]
The edge extraction unit 32 has a function of reading the density level of the document image data and detecting a point where the density level changes rapidly as a boundary line between the black edge on the photo document 13 and the subject image (edge of the subject image). are doing.
[0034]
The edge extracting unit 32 has a function of detecting a sudden change in the gray level by, for example, a spatial filter (Laplacian) or a Fourier transform process.
The tilt calculator 33 receives the rough magnification input from the keyboard 19, and tilts the edge of the subject image on the document image data extracted by the edge extractor 32 with respect to the temporary horizontal line, and the height and width of the subject image. Is calculated and obtained.
[0035]
The magnification angle calculation unit 40 has a function of calculating a magnification and a rotation angle of a subject image that matches a document frame on the layout designation paper 11 based on the edge position of the subject image detected by the edge detection unit 30. .
[0036]
Next, the operation of the apparatus configured as described above will be described with reference to a magnification angle setting flowchart shown in FIG. 2 and a magnification angle setting work flow chart shown in FIG.
In this magnification angle setting operation, the operation of reading the layout designation paper 11 and the operation of reading the photographic original 13 are performed in parallel.
[0037]
First, the operation of reading the layout designation sheet 11 will be described.
The layout scanner 10 reads the layout designation sheet 11 and outputs the layout image data.
[0038]
Note that the rotation angle is not specified when the allocation designation paper 11 is read by the allocation scanner 10. The resolution is fixed.
The allocated image data output from the allocation scanner 10 is stored in the storage device 16 in step # 1.
[0039]
Next, the leveling unit 21 reads out the allocated image data stored in the storage device 17 in step # 2, and displays the allocated image data on the monitor CRT display 20 as a screen for the leveling allocation as shown in FIG. Display output.
[0040]
On the layout horizontal display screen, an image of the layout designation sheet 11 is displayed, and a work instruction of "designating two horizontal reference points" is displayed.
Here, when the position of each plate-making registration mark 50 on the layout designation paper 11 is designated by the operator's operation of the keyboard 19 or the mouse, the leveling unit 21 detects these plate-making registration marks 50, and outputs horizontal marks from the plate-making registration marks 50. Then, the horizontal and vertical directions of the layout designation sheet 11 are set.
[0041]
Next, the image clipping unit 22 switches the display screen of the monitor CRT display 20 to the display screen of the assignment area instruction in response to the operation of the keyboard 19 or the mouse by the operator shown in FIG.
[0042]
On the display screen of the allocation area instruction, an image of the allocation designation paper 11 for specifying the allocation area is displayed, and respective instruction columns of the area number NO, the image name, and the succession are displayed.
[0043]
Here, as shown in FIG. 6, when the corner of each area including each of the original frames “1” to “3” of the layout designation sheet 11 is designated by the operation of the keyboard 19 or the mouse by the operator, the image cutout unit In step # 3, the area including the document frames "1" to "3" is recognized from these corner coordinates, and each image data corresponding to these areas is cut out.
[0044]
When the operator operates the keyboard 19 or the mouse to input the image names of the original document frames “1” to “3” and inputs the sequence, the image cutout unit 23 outputs these image names, Is set for each area including the document frames "1" to "3".
[0045]
Next, the document frame detection unit 23 detects the gray level of each area of the document frames “1” to “3”, and from the place where the gray level decreases, the document frames “1” to “ 3 "is detected.
[0046]
Next, the parameter calculation unit 24 determines the height of the document frame on the layout image data detected by the document frame detection unit 23 in step # 4, for example, the height m and width n of the document frame shown in FIG. The inclination θ with respect to the horizontal reference line obtained by leveling is detected.
[0047]
Next, the main control unit 14 determines whether the detection of the height m, the width n, and the inclination θ for all the document frames “1” to “3” on the layout image data has been completed. The height m, the width n, and the inclination θ of each of the frames “1” to “3” are stored in the storage device 16, for example.
[0048]
On the other hand, a reading operation for the photo document 13 will be described.
The document scanner 12 reads the photo document 13 and outputs the document image data. The document image data output from the document scanner 12 is stored in the storage device 17 in step # 10.
[0049]
When reading the photographic document 13 by the document scanner 12, the rough magnification is input through the keyboard 19, and the rough magnification r is stored in the storage device 17.
[0050]
Next, the document discrimination unit 31 reads the document image data stored in the storage device 17 and compares and compares the document image data with the previously stored dimensions of the black edges 13a to 13c for each type of the photo document 13 shown in FIG. Then, the type of the photographic document 13, for example, 35 mm photographic film, brownie or 4 × 5, is determined, and the edge of the photographic document 13 is marked.
[0051]
Here, if there are a plurality of photo originals 13 to be image-input from the original scanner 12, each original image data of these photo originals 13 is sequentially read from the original scanner 12, and each time the operator's keyboard 19 or mouse is used. By operation, the image number NO of each photo document 13 is input. The image number NO corresponds to each area number set in each of the document frames “1” to “3” of the layout designation sheet 11.
[0052]
Next, in step # 11, the edge extracting unit 32 reads the density level of the document image data stored in the storage device 17 through a spatial filter, and when the density level changes rapidly, that is, as shown in FIG. A boundary 13c between the black edge 13a on the photographic document 13 and the subject image 13b is detected.
[0053]
Next, the inclination calculation unit 33 detects the edge position of the subject image 13b from each boundary line 13c on the document image data extracted by the edge extraction unit 32, and as shown in FIG. , And the height m ′ and the width n ′ of the subject image 13b are calculated and obtained.
[0054]
Next, the magnification angle calculator 40 multiplies the ratio of the height m of the document frame detected by the parameter calculator 24 to the height m ′ of the subject image 13b obtained by the tilt calculator 33 by a rough magnification r. To determine the magnification. That is,
Variable magnification = (m / m ′) × r (1)
It is.
[0055]
Further, the magnification angle calculator 40 sets the rotation angle of the subject image 13b obtained by the parameter calculator 24 to the rotation angle in accordance with the tilt θ of the document frame detected by the parameter calculator 24. That is,
Rotation angle = θ ′ = θ (2)
It is.
[0056]
Thereafter, the original image data is corrected based on the magnification and the rotation angle, and a stencil based on the layout designation sheet 11 is created.
As described above, in the above-described embodiment, the height of the document frame and the inclination with respect to the horizontal on the image data are detected by reading the layout designation sheet 11, and the object in the document image data obtained by reading the photo document 13 is also detected. The height of the image and the inclination of the edge with respect to the temporary horizontal line are obtained, the ratio between the height of the original frame and the height of the subject image is multiplied by the rough magnification to obtain the magnification, and the inclination of the subject image is calculated as the inclination of the original frame. The rotation angle is adjusted in accordance with the angle of rotation, so that the magnification and rotation angle of the photo document 13 can be automatically obtained, so that a separate device such as a magnification angle setting machine is not required, and the work load can be reduced. .
[0057]
In addition, since the magnification and the rotation angle of the photographic document 13 are automatically obtained without the intervention of an operator, it is possible to prevent an error in specifying the magnification and the rotation angle.
The parameter detecting means 20 detects the height m, width n, and inclination .theta. Of the original frame on the layout designation sheet 11 horizontally from the plate-making registration mark 50, so that these height m, width n, and inclination .theta. Can be accurately detected, and the accuracy of the parameters used to determine the magnification and rotation angle of the photo document 13 can be increased.
[0058]
Further, the edge detecting means 30 extracts the edge of the subject image 13b in the document image data and obtains the inclination θ ′ of this edge with respect to the temporary horizontal line. Therefore, the inclination θ ′ of the subject image 13b is used as the inclination θ of the document frame. Accurate matching can be achieved and a highly accurate rotation angle can be obtained.
[0059]
Further, since the edge detecting means 30 determines the type of the photo original 13, it can be applied to, for example, 35 mm photographic film, brownie, and 4 × 5 photo originals 13, and the type of the photo original 13 can be increased.
[0060]
【The invention's effect】
As described in detail above, according to the present invention, it is possible to provide an automatic magnification angle setting device that can automatically determine the magnification and rotation angle of a photographic document and reduce the work load.
Further, the present invention can provide an automatic magnification angle setting device that can automatically determine the magnification and rotation angle of a photographic document to reduce the work load, and can prevent erroneous designation of the magnification and rotation angle.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing one embodiment of an automatic magnification angle setting device according to the present invention.
FIG. 2 is a flowchart for determining a magnification angle.
FIG. 3 is a diagram showing dimensions of various photo originals.
FIG. 4 is a work flow chart for setting a magnification angle.
FIG. 5 is a diagram showing a screen for layout horizontal placement.
FIG. 6 is a diagram showing a display screen of an allocation area instruction.
FIG. 7 is a schematic diagram illustrating detection of the height, width, and inclination of a document frame.
FIG. 8 is a diagram showing edge extraction of a photo document.
FIG. 9 is a schematic diagram illustrating detection of the height, width, and inclination of a photo document.
FIG. 10 is a diagram showing a conventional work of measuring the magnification and the rotation angle of a photo original.
[Explanation of symbols]
Reference Signs List 10: Assignment scanner, 11: Assignment designation paper, 12: Original scanner, 13: Photo original, 14: Main control unit, 16, 17: Storage device, 19: Keyboard, 20: Monitor CRT display, 20: Parameter Detecting means, 21: horizontal section, 22: image cutting section, 23: document frame detecting section, 24: parameter calculating section, 30: edge detecting section, 31: document discriminating section, 32: edge extracting section, 33: inclination Calculation unit, 40: magnification angle calculation unit.

Claims (3)

Parameter detection means for reading the layout designation sheet and detecting the size and inclination of the document frame on the layout designation sheet;
Edge detecting means having a function of extracting an edge of a subject image from a sudden change in shading level in document image data obtained by reading a document, and obtaining at least the height of the subject image and a slope of the edge with respect to a temporary horizontal line; ,
Magnification angle calculation means for calculating a magnification and a rotation angle of the subject image matching the document frame based on the edge position and inclination of the subject image detected by the edge detection means;
An automatic magnification angle setting device, comprising: Parameter detection means for reading the layout designation sheet and detecting the size and inclination of the document frame on the layout designation sheet;
The type of the original is determined by comparing the size of the edge of the original image data obtained by reading the original with the size of the edge of the various types of original stored in advance, and the sharp change in the density level of the determined original image data is determined. Edge detection means having a function of detecting the edge of the subject image from, and obtaining at least the height of the subject image, the inclination of the edge with respect to a temporary horizontal line,
Magnification angle calculation means for calculating a magnification and a rotation angle of the subject image matching the document frame based on the edge position and inclination of the subject image detected by the edge detection means;
An automatic magnification angle setting device, comprising: A parameter detection unit having a function of reading the layout designation sheet, performing horizontal alignment from the plate-making registration marks on the image data of the layout designation sheet, and thereafter detecting at least the height of the document frame on the layout designation sheet and the inclination with respect to the horizontal. ,
  The type of the original is determined by comparing the size of the edge of the original image data obtained by reading the original with the size of the edge of the various types of original stored in advance, and the sharp change in the density level of the determined original image data is determined. Edge detection means having a function of extracting an edge of the subject image from and obtaining at least the height of the subject image, and an inclination of the edge with respect to a temporary horizontal line;
  The ratio between the height of the document frame detected by the parameter detection means and the height of the subject image obtained by the edge detection means is multiplied by a rough magnification to obtain a magnification, and the ratio is obtained by the edge detection means. Magnification angle calculation means having a function of setting a rotation angle in accordance with the inclination of the document frame detected by the parameter detection means, the inclination of the subject image,
An automatic magnification angle setting device, comprising:

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