JPH0368596B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for setting the magnification and rotation angle of a document when making a plate using a color scanner.

[Prior Art] Conventionally, a color scanner is used when performing color plate making from an original such as a photographic positive.
This color scanner attaches a document to a drum, rotates the drum and scans it in the axial direction, reads the image of the document by photoelectric scanning, separates it into each color, and performs the necessary corrections. Automatically produce net positives or net negatives for each color.

When performing color plate making using such a color scanner, the enlargement or reduction magnification of the original is calculated from the outline of the original image specified on the specified layout sheet, and when the original is set on the color scanner, By inputting this magnification and changing the scanning speed, etc., a net negative having a predetermined magnification is produced. Then, this mesh negative is pasted on the designated layout paper at the designated position. In this case, if the image of the original is tilted or if the layout specification paper specifies that the original be placed diagonally, this mesh negative should be rotated accordingly and attached to the negative for plate making. Create.

Additionally, there is a color scanner known as a layout scanner, which processes image signals obtained by photoelectrically scanning a document and can electronically enlarge and rotate the image. It is. In addition, according to this layout scanner, it is possible to create a rope negative by exposing multiple originals at a specified position, magnification, and rotation angle according to a specified layout sheet on a large negative for one page of printed matter. I can do it.

However, by processing this image signal and enlarging the image,
Rotation requires a large amount of calculation, slows down the processing speed and is inefficient, and causes problems such as a decrease in the quality of the image as a result of the processing. For this reason, even when using this layout scanner, the magnification and rotation angle of the original are determined in advance before pasting the original onto the drum of this layout scanner, and the original is adjusted to correspond to the rotation angle determined in advance. It is preferable to attach the printed image diagonally to the drum using a predetermined method, and input a predetermined magnification into the layout scanner.

Conventionally, the magnification and rotation angle of the document have been determined in advance using the following method.
In other words, first place the manuscript on the specified layout paper,
Find the rotation angle of this manuscript using a ruler, etc.
In addition, the image of this original is projected onto the specified layout paper using a projector, and the size of this projected image is changed by changing the distance between the projector and the specified layout paper and the focal length of the lens, and the size of this projected image is changed and the layout is adjusted with this projected image. The magnification of this document is calculated from the above-mentioned distance and the focal length of the lens in this state, in correspondence with the outline of the screen specified on the specified paper.

However, such conventional methods rely heavily on manual labor, are inefficient, and have low accuracy.

[Problems to be Solved by the Invention] The present invention has been made based on the above-mentioned circumstances, and it is an object of the present invention to accurately and efficiently set the magnification and rotation angle of a document before pasting the document on the drum of a layout scanner. The purpose is to provide a device that can.

[Means for Solving the Problems and Their Effects] The present invention places a designated layout sheet and a document on a position coordinate detection means, and projects an image of the document at a predetermined magnification onto the position coordinate detection means. Then, specify two or more representative points on the image of this manuscript, specify the points on the sketch of the image on the layout specified paper that correspond to these points, and calculate the coordinates of these points using this position coordinate detection method. Detect by means. Then, the position coordinates of these points are sent to a signal processing means, and this signal processing means calculates the magnification and rotation angle of this original when making a plate from this original according to the specifications of the layout designated paper from the coordinates of these points. calculate. The calculated magnification and rotation angle are then sent to the recording means,
This recording means records the magnification and rotation angle on the recording medium. In this recording, for example, the rotation angle is recorded as a rotation reference line that is inclined by an angle corresponding to the rotation angle with respect to the reference line. Then, attach this recording medium to the original so that its reference line and the reference line of the original are parallel, and place this original on the drum so that this rotational reference line is parallel to the reference line of the drum of the layout scanner. Installing.
Therefore, this document is mounted on the drum while being rotated by the calculated rotation angle. Also, the magnification recorded on this recording medium is input to the layout scanner.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In the figure, 2 is a transmissive original digitizer, 6 is an original image projection device, and 20 is a reflective layout designated paper digitizer, and these constitute a position coordinate detecting means.

Further, in the figure, 40 is a central signal processing circuit, 42 is a storage circuit, 44 is a keyboard, and 46 is a CRT, which constitute a signal processing means.

Further, in the figure, 48 is a printer, 50 is a floppy disk, and 52 is a drawing machine, which constitute a recording means.

The document digitizer 2 described above is of a transmissive type and is configured to detect the positional coordinates of an arbitrary point designated by the tablet 4 and output this positional coordinate signal. A document image projection device 6 is provided on the back side of the document digitizer 2. This original image projection device 6 includes a light source 10, a lens 8, etc., and projects an image of an original 14 such as a 35 mm film held in a holder 12 onto the original digitizer 2 from the back side at a constant magnification on the coordinate axis of the digitizer. It is configured to project so that the top, bottom, left and right sides are kept parallel to each other. Further, the above-mentioned layout designation paper digitizer 20 is of a reflective type, and the layout designation paper 22 is placed on it so as to maintain vertical and horizontal parallelism to the coordinate axis of the digitizer, and any arbitrary number designated by the tablet 38 is It is configured to detect the position coordinates of a point and output the position coordinate signal. Note that on this layout specification sheet 22, outlines 26, 28, 30 indicating the size and shape of each screen are drawn, and within these outlines 32, 34, 36 are drawn rough sketches of the images on the screen. ing. Also,
A registration mark 24 indicating a reference position is printed on this layout designation sheet 22.

Then, while viewing the document image 16 projected onto the document digitizer 2 by the document image projecting device 6, a plurality of representative points of the outline of the screen of the document are located at diagonal positions, for example. Two points A and B and a plurality of representative points of the pattern 18, such as two points C and D at both ends of the pattern 18, are indicated on the tablet 4, and the position coordinates of these points are measured. In addition, the above-mentioned layout specified paper digitizer 20
A plurality of representative points of the outline 26 of the screen corresponding to the above-mentioned original drawn on the layout designation paper 22 placed on top, for example, two points A' and B' at diagonal positions, and a sketch 32 of the picture. Of these, points C' and D' corresponding to the points C and D specified on the picture of the original are specified on the tablet 38. In addition, this layout designation paper 22
The register mark 24 indicating the reference position is also indicated.
Then, the position coordinates of each of these points are measured.

Then, the position coordinate signals of each point measured by the document digitizer 2 and the layout designated paper digitizer 20 are sent to the central signal processing circuit 40. Further, a magnification signal corresponding to the magnification of the projected image is sent from the document image projection device 6 to the central signal processing circuit 40 .

Then, in this central signal processing circuit 40, the position coordinates of each of the above points are temporarily stored in the storage circuit 42,
From these position coordinates, the magnification and rotation angle of the original 14 during plate making are calculated. This calculation calculates the position coordinates of point A as (a _x , a _y ) and the position coordinates of point B as (b _x , a y ).
b _y ), the position coordinates of point C are (c _x , d _y ), the position coordinates of point D are (d _x , d _y ), the position coordinates of point A' are (a' _x , a' _y ),
The position coordinates of point B′ are (b′ _x , b′ _y ), the position coordinates of point C′ are (c′ _x , c′ _y ), and the position coordinates of point D′ are (d′ _x , d′ _y ). Then, the magnification m′ for the finished manuscript is as follows (1),
Also, the rotation angle θ for the finished manuscript is as shown in (2) below.
It can be calculated using the formula.

θ＝tan ^-1 (c′ _y −d′ _y /c′ _x −d′ _x )
−tan ⁻¹ (c _y −d _y /c _x −d _x )…(2) In addition, this central signal processing circuit 40 determines the above-mentioned magnification m′ and rotation angle θ, and processes the original according to these. It is calculated whether trimming is possible within the outline 26 of the screen specified on the layout specification sheet 22 when the image is completed. This operation is
This can be determined based on whether or not formulas (3) to (10) are satisfied.

b _x d _x + {(a′ _x −d′ _x )cosθ−(a′
_y −d′ _y ) sinθ}×m/m′a _x …(3) a _x c _x + {(b′ _x −c′ _x ) cosθ−(b′ _y −c
′ _y ) sinθ}×m/m′b _x …(4) b _y d _y + {(a′ _x −d′ _x ) sinθ+(a′ _y −d
′ _y ) cosθ}×m/m′a _y …(5) a _y c _y + {(b′ _x −c′ _x ) sinθ+(b′ _y −c
′ _y ) cosθ}×m/m′b _y …(6) b _x d _x + {(b′ _x −d′ _x )cosθ−(a′ _y −d
′ _y ) sinθ}×m/m′a _x …(7) b _x c _x + {(a′ _x −c′ _x ) cosθ−(b′ _y −c
′ _y ) sinθ}×m/m′a _x …(8) b _y d _y + {(b′ _x −d′ _x ) sinθ+(a′ _y −d
′ _y ) cosθ}×m/m′a _y …(9) b _y c _y + {(a′ _x −c′ _x ) sinθ+(b′ _y −c
′ _y )cos θ}×m/m′a _y (10) Similarly to the above, the magnification, rotation angle, and whether or not trimming is possible are calculated for each of the other documents 14.
The manuscript number, item, etc. of each manuscript can be found on keyboard 4.
4 to its central signal processing circuit 40.

The above calculation results are temporarily stored in the memory circuit 42 as numerical values and line drawings, and then displayed on the CRT 46 and recorded by recording means such as the printer 48, floppy disk 50, plotter 52, etc. .

The drawing machine 52 described above is mainly used when the original is a 35 mm film or the like, and a plurality of originals 14 are held on the holder 12. As shown in FIG. 2, this holder 12 has a belt-shaped flat plate 60 made of synthetic resin or the like, and a plurality of windows 62 are formed in this belt-shaped flat plate. Incidentally, if the material of the band-shaped flat plate 60 is a transparent synthetic resin, there is no need to provide a window. Documents 14 such as 35 mm film are placed in the portions corresponding to these windows 62, and labels 68 are placed corresponding to these, and these documents 14 and labels 68 are in a predetermined positional relationship with each other. Glued. In addition, this belt-shaped flat plate 6
Positioning pins 64 are provided protrudingly on the surface of the label 0, and the perforations 66 of the original 14 are fitted into these positioning pins 64, and the positioning holes 7 of the label 68 are fitted into the positioning pins 64.
0 and 72 and place them in the predetermined positions. Further, the holder 60 is formed with positioning holes 74 and 76 for positioning when the holder 60 is attached to the above-mentioned drawing machine 52 or the like. The holder 60 holding the plurality of originals is attached to the plotting machine 52, and the plotting machine 52 receives a signal from the central signal processing circuit 40 to hold the holder 60.
Data such as the document number, magnification m', rotation angle θ, etc. are recorded in letters on the label 68 above 0, and a rotation reference line 92 is inclined with respect to the reference line 90 by an angle corresponding to the rotation angle. draw

Further, the printer 48 described above also has its recording paper 80.
The document number, magnification,
Data such as rotation angles are recorded in characters, and along with these data, a rotation reference line 92 inclined with respect to the reference line 90 by an angle corresponding to the rotation angle θ is also provided on the label portion 84 of the recording paper 80. Print. Note that the label section 84 is constructed so that it can be separated from the recording paper 80 by perforations 86.

Next, the operation of this embodiment will be explained. First, the holder 12 holding the original 14 is attached to the original image projection device 6, and the image 16 of this original is projected onto the original digitizer 2. And this projected image 16
Measure the coordinates of the above points A, B, C, and D using the tablet 4. The projection magnification of this original image projecting device 6 is appropriately set in advance, and the image of the original is projected with a sufficient size, so that the position coordinates of each of the above points can be accurately measured. Note that if the original is large, the original may be placed directly on the original digitizer 2. This document digitizer 2 is of a transmissive type, and since an image is projected from the back side, the shadow of the operator's hand is not projected, making the work easier. Further, the layout designation paper 22 is placed on the layout designation paper digitizer 20, and the position coordinates of each point A', B', C', and D' are measured in the same manner as described above. Also,
At the same time, enter the number of this manuscript on the keyboard 44.
Enter by.

These signals are then sent to the central signal processing circuit 40, which calculates the magnification, rotation angle, trimming availability, etc. for the finish of the original, as described in detail. Then, these calculation results are displayed on CRT4
6 and recorded on the floppy disk 50, as well as being recorded by the printer 48 and drawing machine 52 as described above.

For example, if the document is large, the label section 84 is cut off from the recording paper 80 printed out from the printer 48, and the reference line 90 of the label section 84 is cut off.
are arranged so that they are parallel to the reference direction of the original, and then pasted together. Note that when the document 14 is held in the holder 12 and the label 68 on the holder 12 is directly recorded using the drawing machine 52, the document 14 and the label 68 may be removed from the holder 12 together.

When this document 14 is mounted on the drum of a layout scanner, the above-mentioned label 68
If the document is mounted so that the rotation reference line 92 shown above is parallel to the reference line of the drum, the document is mounted on the drum with an inclination of a predetermined rotation angle. Furthermore, the magnification recorded on this label 68 is read and the numerical value is input into the layout scanner.

Note that the present invention is not limited to the above embodiments. For example, the recording means described above is not necessarily limited to that of the embodiment. In addition, in the above embodiment, the case where two representative points of the picture pattern and two representative points of the outline of the screen were each specified was explained.
You may specify more than one point. Furthermore, if measurements are taken multiple times at the same point and the average value is taken, the manual error in position coordinates can be canceled out. The greater the number of points specified in this way, the more accurate the magnification and rotation angle will be. Further, the data medium is not limited to a floppy disk, but may be an online communication means with another system such as a scanner, or may be another offline information medium.

[Effects of the Invention] As described above, the present invention can automatically set the magnification and rotation angle of the original by simply specifying multiple points on the original and the designated layout paper, reducing the need for manual work and increasing efficiency. The effects are significant, such as improved target accuracy and improved accuracy.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a diagram showing the overall structure of the device, Fig. 2 is a plan view showing the structure of the document holder, and Fig. 3 is a diagram showing the record display printed out by the printer. It is a figure which shows an example. 2... Original digitizer, 6... Original image projection device, 12... Holder, 14... Original, 20...
Digitizer for designated layout paper, 22: designated layout paper, 40: central signal processing circuit, 48: printer, 52: drawing machine.

Claims (1)

[Scope of Claims] 1. A position coordinate detection means for outputting the position coordinates of a specified arbitrary point on the layout designation sheet and the original document, and a position coordinate detection means for outputting the position coordinates of a designated arbitrary point on the layout designation sheet and the original document, and a position coordinate detection means that receives a position coordinate signal from the position coordinate detection means and detects the specified position on the image of the original document. magnification when making a plate from the manuscript based on the positional coordinates of two or more representative points and the positional coordinates of two or more points specified corresponding to the points of the picture sketch on the layout designation paper; A document angle and magnification setting device for a color scanner, comprising a signal processing means for calculating a rotation angle, and a recording means for recording the calculated magnification and rotation angle. 2. The position coordinate detection means includes a transmissive digitizer and a projection device that projects an image of the document at a fixed magnification from the back side of the transmissive digitizer. Document angle and magnification setting device for color scanners as described in . 3. The recording means records the rotation angle on the recording medium as a rotation reference line that is inclined by an angle corresponding to the rotation angle with respect to the reference line. An original angle and magnification setting device for a color scanner according to item 1. 4. An original angle and magnification setting device for a color scanner according to claim 3, wherein the recording means is a drawing machine. 5 A document holder capable of fixing a plurality of sheets of the document at a predetermined position is provided, and the document holder is capable of attaching the projector to the projector and is capable of being attached to the drawing machine at a predetermined position. An original angle and magnification setting device for a color scanner according to claim 1, characterized in that: