JPS62219767A - Device for setting angle and magnification of color scanner original - Google Patents

Abstract

PURPOSE:To exactly and efficiently set the magnification and the angle of rotation of an original, by providing a signal processing means which calculates the magnification and the angle of rotation at the photoengraving time of an original, and a recording means which records calculated magnification and angle of rotation. CONSTITUTION:A position coordinate signal of respective point measured by an original digitizer 2, and an allocation designating paper digitizer 20 is sent to a central signal processing circuit 40, and also, from an original image projecting device 6, a magnification signal corresponding to the magnification of a projecting image is sent to the central signal processing circuit 40. At the central signal processing circuit 40, the position coordinate of respective point is stored temporarily, and the magnification and the angle of rotation of an original 14 at the photoengraving time are calculated from those position coordinates. And the goodness/bandness, etc., of the magnification, the angle of rotation, or a trimming against the finishing of the original is calculated, and an arithmetic result is displayed on a CRT46, and also, is recorded on a floppy disk, and at the same time, it is recorded by a printer 48 or a plotter 52. In this way, the magnification and the angle of rotation of the original can be set automatically only by instructing plural points.

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 during plate making 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, makes necessary corrections, and prints the image for plate making. Automatically produce net positives or net negatives for each color.

When performing color plate making using such a color scanner, layout is done by calculating the enlargement or reduction magnification of the original from the outline of the original image specified on the specified paper, and then applying this magnification when setting the original on the color scanner. A screen negative of a predetermined magnification is produced by inputting the information and changing the scanning speed, etc. Then, this net negative is pasted on the designated paper at the designated position. In this case, if the image of the original is tilted, or if the layout is specified so that the original is laid out diagonally, the screen negative is rotated accordingly and pasted. Make a negative.

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. . In addition, according to this layout scanner, it is possible to layout a large negative for one page of printed matter and create a halftone negative by exposing multiple originals at a specified position, magnification, and rotation angle according to the specified paper. can.

However, processing this image signal to enlarge and rotate the image requires a large amount of calculation, and the processing speed is slow and inefficient, and as a result of the processing, there are problems such as a decrease in the quality of the image. 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 placed on the drum of the layout scanner in accordance with the rotation angle determined in advance. It is preferable to attach the image diagonally to the layout scanner and input the predetermined magnification into the layout scanner.

Conventionally, the magnification and rotation angle of the document have been determined in advance using the following method.

That is, for layout, first, a document is placed on a designated sheet of paper, and the rotation angle of this document is determined using a ruler or the like.

In addition, the image of this manuscript is projected onto a designated paper using a projector, and the size of this projected image is changed by changing the distance between the projector and the designated paper and the focal length of the lens. corresponds to the contour of the screen specified on the specified paper, and calculates the magnification of this document from the above-mentioned distance and the focal length of the lens in this state.

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

[Problems to be Solved by the Invention] The present invention has been made based on the above 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 includes:
Place a designated sheet of paper and a document on the position coordinate detection means, or project the image of the document at a predetermined magnification onto the position coordinate detection means, and detect two or more points representative of the image of the document. For designation and layout corresponding to these points, points on the sketch of the design on the designated paper are designated, and the coordinates of these points are detected by this position coordinate detection means. Then, the position coordinates of these points are sent to the signal processing means, and this signal processing means calculates the magnification and rotation angle of this manuscript when printing from this manuscript according to the layout specified by the specified paper from the coordinates of these points. do. The calculated magnification and rotation angle are then sent to a recording means, and the recording means records the magnification and rotation angle on a 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 mount this original on the drum so that this rotational reference line is parallel to the reference line of the drum of the layout scanner. do. 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 document digitizer, 6 is a document image projection device, and 2o is a reflective type digitizer for designated paper.
These constitute a position coordinate detection 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 70-tube disc, 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 position coordinates of an arbitrary point designated by the tablet 4 and to output this position 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.
It is configured to project an image of a document 14 such as a 5 mm film onto the document digitizer 2 from the back side at a constant magnification so that the top, bottom, right and left are parallel to the coordinate axis of the digitizer. In addition, the above layout is for the specified paper digitizer 2.
0 is a reflective type, and a designated paper 22 is placed on it so as to maintain horizontal and vertical parallelism with the coordinate axis of the digitizer, and the position coordinates of an arbitrary point designated with the tablet 38 are detected. It is configured to output the position coordinate signal. Note that this layout is achieved by drawing outlines 26, 28, 30 on the designated paper 22 that indicate the size and shape of each screen, and also includes rough sketches 32, 34, 34, 32, 34, 30, 30, 30, 30, 30, 30, 32, 32, 32, 32, 28, 30, 32, 30, 32, 32, 30 outlines for each screen to indicate the size and shape of each screen.
36 is drawn. Further, for this layout, a registration mark 24 indicating a reference position is printed on the designated paper 22.

Then, the image of the original projected onto the original digitizer 2 by the original image projection device @6! While looking at 1116, select a plurality of representative points on the outline of the screen of this original, for example, two points A at diagonal positions.

B, and a plurality of representative points of the pattern 18, for example, the pattern 1
Two points C and D at both ends of 8 are indicated with the tablet 4, and the position coordinates of these points are measured. In addition, the above layout is for the designated paper 22 when placed on the designated paper digitizer 20.
A plurality of representative points of the outline 26 of the screen corresponding to the above-mentioned original drawn on the screen, for example, two points A'' and B'' located at diagonal positions.
And out of the picture sketch 32, points C' and D' corresponding to the points C and D specified on the picture of the original are drawn on the tablet 3.
Specify with 8. This layout also indicates the register mark 24 indicating the reference position of the designated paper 22.

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 2o are sent to the central signal processing circuit 40. Further, a magnification signal corresponding to the magnification of the projected image is sent to the central signal processing circuit 40 from the above-mentioned manuscript garden projection device W6.

In the central signal processing circuit 40, the positional coordinates of each point are temporarily stored in the storage circuit 42, and the magnification and rotation angle of the original 14 during plate making are calculated from these positional coordinates. This calculation calculates the position coordinates of point A as (ax, ay), the position coordinates of point B as (bx+by), and the position coordinates of point C as (C
XIC)'), the position coordinates of the point are ('x + dy)
, the position coordinates of point A' are (a/ , , a/ , )
, the position coordinates of point B' are (b'x, b'y), the position coordinates of point C' are ("X r "7), and the position coordinates of point 1 are (d'x, d', ). Then, the magnification m- for the finished document can be calculated by the following equation (1), and the rotation angle θ for the finished document can be calculated by the following equation (2).

Moreover, in this central signal processing circuit 40, the above-mentioned magnification m'
, rotation angle θ are determined, and it is calculated whether or not the layout can be trimmed within the outline 26 of the screen designated on the designated paper 22 when the original is finished according to these. This calculation can be determined depending on whether the following equations (3) to (10) are satisfied.

...(3) ...(4) ...(5) ...(6) ...(7) bx≦cx+((a'x-c')□oosθ-(b'y
-C'y)Sillθ)×ko≦az... (8) by≦ay+(("X-"X)=θten(a'y-d'y
) oos #)

Note that the document number, item, etc. of each document are input to the central signal processing circuit 40 through the keyboard 44.

The above calculation results are temporarily stored in the memory circuit 42 in the form of numerical values and line drawings, and then displayed on the CRT 46.
152 or the like.

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 60. Incidentally, if the material of the band-shaped flat plate 6o 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 thereto, and these documents 14 and labels 68 are in a predetermined positional relationship with each other. Glued. Note that positioning bins 64 are provided protruding from the surface of this belt-shaped flat plate 60, and the original 14 is placed in these positioning bins 64.
The above bar 7 oration 66 is fitted, and the above label 6 is fitted.
8 positioning holes 70 and 72 are fitted, and these are placed in a predetermined position. Further, this holder 60 is formed with positioning holes 74 and 76 for positioning when the holder 60 is attached to the above-mentioned triggering machine 52 or the like. The holder 60 holding a plurality of originals is mounted on the plotting machine 52, and the plotting machine 52 uses a signal from the central signal processing circuit 40 to display the document number and magnification on a label 68 on the holder 60. Data such as m', rotation angle θ, etc. are recorded in letters, and the reference l! A rotation reference line 92 is drawn that is inclined with respect to 90 by an angle corresponding to the rotation angle.

The printer 48 also records data such as the document number, magnification, rotation angle, etc. in characters on the data display section 82 of the recording paper 80, and also records the data such as the document number, magnification, rotation angle, etc. on the label section 84 of the recording paper 80. Along with these data, a rotation reference line 92 inclined with respect to the reference 1190 by an angle corresponding to the rotation angle θ is printed. Note that this label portion 84 is configured so that it can be separated from this recording paper 80 by a perforation 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.

Then, each of the points A, B, C, D on this projected image 16
The coordinates of are measured with 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.

Also, place the designated paper 22 on the designated paper digitizer 20, and do the same as above for each point A', B=, C.
-, D- measure the position coordinates.

At the same time, enter the number of this manuscript on the keyboard 44.
Enter by.

Then, these signals are sent to the central signal processing circuit 4o, and as described in detail, the magnification, rotation angle, trimming availability, etc. for the finish of the original are calculated. The results of these calculations are displayed on the CRT 46, recorded on the 70-tube disk 50, and also recorded by the printer 48 and drawing machine 52 as described above.

For example, if the document is large, the printer 48
The label part 84 is cut off from the recording paper 80 punched out from the recording paper 80, placed so that the reference line 90 of the label part 84 is parallel to the reference direction of the document, and then pasted together. Note that when the original 14 is held in the holder 12 and the label 68 on the holder 12 is directly recorded using the drawing 152, the original 14 and the label 68 may be removed from the holder 12 together.

When the original 14 is mounted on the drum of a layout scanner, the rotation reference line 92 displayed on the label 68 is parallel to the reference line of the drum, and the original is placed in a predetermined position. is attached to this drum at an angle of rotation of . Further, 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. Further, in the above embodiment, a case has been described in which two representative points each of the picture pattern and the outline of the screen are specified, but three or more points may be specified. 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 70 disk, but may also be an online communication means with a communication system such as a scanner, or other offline information medium.

[Right effect] As mentioned above, in the present invention, the magnification and rotation angle of the manuscript can be automatically set by simply specifying multiple points on the specified paper for the manuscript and layout, so the manual commissioning part is reduced. The effects are great, such as being less expensive, more efficient, and improving 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.

Claims (5)

[Claims] (1) A position coordinate detection means for outputting the position coordinates of a designated arbitrary point on the layout designation sheet and the manuscript, and a position coordinate detection means for outputting the position coordinates of a specified arbitrary point on the layout designation sheet and the manuscript, and a position coordinate signal from the position coordinate detection means to detect a designated representative point on the image of the manuscript. Calculate the magnification and rotation angle when making a plate from the above manuscript from the position coordinates of two or more points and the position coordinates of two or more points specified corresponding to the above points of the picture sketch on the layout specified paper. 1. A document angle and magnification setting device for a color scanner, comprising a signal processing 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. The original angle and magnification setting device for a color scanner as described in item 1. (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 as described in scope 1. (4) The document 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 in a predetermined position is provided, and the document holder can be attached to the projector and can be attached to the plotter at a predetermined position. An original angle and magnification setting device for a color scanner as claimed in claim 1.