JPH03617B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a setup method that is carried out prior to disassembly work using a color scanner, and particularly relates to a setup method that is performed prior to disassembly work using a color scanner, and in particular, it is possible to attach a color document to a color scanner drum at the correct angle and simultaneously disassemble it. This invention relates to a method for easily and accurately determining setup points (highlight, middle, and shadow areas).

Conventionally, color scanners are known that have a so-called editing function, that is, a full-page collection function, which performs color separation and final layout at the same time. In order to load a document into a scanner that processes such color separation and full-page collection simultaneously, the document must be placed at a predetermined angle with respect to the baseline of the scanner's document drum according to the final layout. It is necessary to have the following.

To explain the reason for this, when the document 2 is attached to the document drum 1 immediately relative to the base line 3 of the document drum as shown in FIG. 1, the film 5 attached to the exposure drum 4 after being scanned is
The image 6 exposed to light also becomes a straight image with respect to the base line 7 of the exposure drum 4.

Therefore, in order to fully utilize the functions of this scanner for simultaneously processing color separation and layout, it is necessary to install the exposure drum 4 as shown in FIG.
If an oblique image 8 with respect to the baseline 7 is required, when loading the original 2 on the original drum 1,
It is desirable that the document drum 1 be attached obliquely to the base line 3 of the document drum 1. This is because the scanner itself has a function that rotates the scanned image at an arbitrary angle with respect to the document before exposing it to the film when exposing the film on the exposure drum 4 after the scanner body has scanned the document. Even if the angle rotation is performed by the computer that processes the information for the page compilation, problems such as an increase in the capacity of the computer itself and an increase in processing time will occur, so it is not possible in terms of cost and time. This is because it will be disadvantageous.

In addition, setup work is performed prior to color separation work, but conventionally, the conditions for the separation setup points (highlights, middle areas, and shadow areas) are set after the color original is set on the color scanner drum. The scanning light source is manually applied to the desired point each time, which is not only unfavorable in terms of work efficiency as the operator cannot leave the machine, but also makes it difficult to accurately set the scanning light source at the condition setting point. As a result, there were problems such as the print loss rate when disassembling normally reached 15 to 20%.

This invention has been made in view of the above circumstances, and it is possible to simultaneously measure the magnification of a color document and to affix the color document to the color scanner drum at the desired angle. It is an object of the present invention to provide a setup method that can easily and accurately determine the decomposition setup point of .

That is, in this invention, the appearance is projected from below onto the digitizer table surface along a certain reference line, and then a color original is placed on the table surface.
Match the magnification and angle of this format image with the color original image, and in this matched state, use the position indicating means to obtain the position information of the necessary separation setup point in the color original and move the color original from the digitizer table. The position information of the color original holding plate to be transferred to the scanner drum is read as coordinates based on the coordinate reference point on the digitizer table, and then the color original is moved to the scanner drum using the color original holding plate so that the rotation axis is above the rotation axis while maintaining the above angle. The image is moved onto the circumferential surface of the color scanner drum, which is set parallel to the reference line, and the predetermined coordinates on the circumferential surface of the color scanner drum are transferred based on the positional information of the color document holding plate read on the digitizer table. The above-mentioned color document is attached to the set-up point, and then, based on the position information of the above-mentioned disassembly set-up point, the scanning head and color scanner The present invention provides a setup method characterized by moving a drum, detecting the signal level at each setup point, and setting an appropriate setup value.

The present invention will be described below with reference to illustrated embodiments. In Figure 3, 11 has a reflective surface such as white,
It is a digitizer table with grid-like wiring for electrically reading coordinate points on the back side, and a position indicating means, such as a cursor 9, is placed on the surface of the table 11 and is slid to indicate a desired coordinate position. can now be read and stored. On the surface of the digitizer table 11, there is provided a reference line 12a along one side, an origin 12b of the projection plane, an X-axis 12c that determines the X-coordinate based on this origin 12b, and a Y-axis 12d that similarly determines the Y-coordinate. It is being In addition, origin 12
b, the X-axis 12c, and the Y-axis 12d may be moved as necessary. Furthermore, a plurality of reference lines 12a may be provided in a predetermined direction. Note that, instead of providing this reference line 12a on the table 11, a corresponding line may be provided on the appearance fixing plate 15, which will be described later. This table 11 is fixed to a frame 13, and a projection lens 14 is also attached to the frame 13 below through a bellows 10. A presentation fixing plate 15 is provided below the projection lens 14 and parallel to the surface of the table 11. The upper surface of this appearance fixing plate 15 has a reference line 12d on the table 11.
A base line 16 is provided parallel to the base line 16, and the device can be moved in parallel in the front-back and left-right directions (that is, the XY plane) along a pair of shafts 17 and 18 that are orthogonal to each other.

Further, on one side of the table 11, there is a color scanner drum support device 19 held on the side surface of the frame 13.
is provided, and a color scanner drum 20
is rotatably and detachably supported so that its axis (or reference line 28) is parallel to the reference line 12a on the table 11. Note that the support device 19 is not limited to the illustrated example, and may be attached to the frame 13 at any other position. Further, in front of the table 11, a shaft 21 is provided, one end of which is fixed to a part of the frame 13, and which extends to the front of the color scanner drum 20 in parallel with the reference line 12a of the table 11. hand,
A base end portion of a rotary arm 22 that is freely movable in the axial direction is pivotally supported on this via an encoder 31. Furthermore, a document holding plate 23 for holding a color document by tape or a suction tube is fixed to the tip of the rotary arm 22. Encoder 3 above
1 is for reading the coordinate position of a reference point 32 (the center of the cross mark) on the upper surface of the document holding plate 23. These rotating arm 22, color scanner drum support device 19, projection lens 14 and table 11
are integrally moved up and down vertically in the direction of the appearance fixing plate 15, or the appearance fixation plate 15 is moved up and down in the direction of the lens 14, or both of them are moved up and down. It is possible to adjust the distance and specify the magnification for the format layout of the color document. A pair of light sources 24 are provided diagonally above the form fixing plate 15 to illuminate the form fixed on the form fixing plate 15.

Next, the operation of reading desired trimming information from a color document and the setup method using this color scanner drum document positioning digitizer device will be described.

First, place the format 25 on the format fixing plate 15 so that a pair of opposing registers 26 are aligned with the reference line 16 or the reference line 1.
Position it so that it is parallel to 2a, and fix it with tape or the like. Appearance fixed in this way 25
is illuminated by the light source 24 and projected onto the digitizer table 11 via the lens 14 (the fourth
(see figure). Next, the color original 27 is placed on the digitizer table 11, the format fixing plate 15 or the frame 13 supporting the lens 14 is moved up and down, the format fixing plate 15 is moved in the X and Y directions, and the lens 14 is moved.
The magnification of the color original 27 and the predetermined insertion section 25' in the projected format 25 while moving it toward the center of the screen,
Adjust the focus and place the color original 27 on the table 1 above.
1, so that the angle and image perfectly match the image being displayed (see Figure 5).

In this state, the digitizer cursor 9 is moved onto the color original 27, the coordinates of the desired trimming range in the original 27 are read, and this trimming information is stored in a storage device (not shown). Disassembly setup points (highlight area, middle area, shadow area)
The coordinates of the points previously selected in the color document 27 are also read by the cursor 9;
This information is stored in a storage device (not shown).

Next, the rotary arm 22 is moved along the shaft 21, and then the color document holding plate 23 is rotated onto the table 11, and the color document 27 positioned as described above is held in that state by tape or suction. It is held by the holding plate 23.

In this state (see FIG. 6), the distances in the X and Y directions between the origin 12b of the projection surface onto the digitizer table 11 and the document holding plate reference point 32 are read by the encoder 31 and displayed on the XY coordinate display device 33. be done. That is, rotating arm 2
2 is a micro switch 34 for setting the origin shown in FIG. 6 (set on the extension line of the Y-axis 12d).
The X direction is automatically set to zero when passing through the axis, and the Y coordinate is automatically set to zero when the rotating arm 22 is extended and its reference point 32 coincides with the X axis 12c. Therefore, the moving distance in these X and Y directions can be accurately read by the encoder 31 provided at the intersection of the shaft 21 and the rotating arm 22.

The rotating arm 22 holding the color original 27 is
It is then moved along the shaft 21 onto the color scanner drum 20. A Y-coordinate reference line 35 and an X-coordinate reference line 36 are also provided on the surface of the color scanner drum 20, and the intersection of these lines is an origin 37. Further, another origin setting micro switch 38 is provided near the shaft 21 on the extension of the Y-coordinate reference line, and the rotating arm 2
2 passes through this point, the value of the X coordinate is automatically set to zero. Regarding the Y coordinate of the drum 20, the rotary arm 22 is expanded or contracted according to the size of the scanner drum 20, so that the reference point 32 of the original holding plate is aligned with the X coordinate reference line 36.
It is automatically set to zero when it matches. Note that when the reference point 32 of the document holding plate coincides with the X-coordinate reference line 36, the rotation angle of the color scanner drum is also set to zero, and this is set as the rotation angle provided on one side of the scanner drum 20. Preferably, the distance in the Y direction is read by the reading encoder 39, and the distance in the Y direction is read by the rotary angle reading encoder 39, and this is automatically converted into curved surface coordinates. In addition,
Even when the color scanner drum 20 is replaced with one of a different size, the relationship with the rotation angle can be automatically converted.

In this way, the color scanner drum 20
The coordinate position of the reference point 32 of the document holding plate above can be automatically read and displayed on the XY coordinate display device 40.

Therefore, the coordinates when the reference point 32 of the document holding plate coincides with the origin 12b on the projection plane and the coordinates when this reference point 32 coincides with the origin 37 on the color scanner drum 20 (generally is (0,
0)), the color original 23 can be pasted on the curved surface coordinate position on the color scanner drum 20 with the same coordinate position as the coordinate position of the color original 23 on the projection surface on the digitizer table 11. can be included. Therefore, in this state, trimming and setup can be automatically performed based on the trimming information and disassembly setup point information read in advance as described above.

Next, this setup operation will be explained using a specific example.

First, as shown on the left side of Figure 6, the color original 2
7 is the digitizer table 11 at the angle shown in the figure.
Suppose that the image matches the appearance image projected on the projection surface of .
In this state, the coordinates on the projection plane of the disassembly setup points set in the document 27 (that is, the highlight part, middle part, and shadow part, none of which are shown) are read by the cursor 9 with 12b as the origin, It is displayed on the XY coordinate display device 41. These coordinates are then pointed to with the cursor 9 and input into a storage device (not shown).

Next, move the rotary arm 22 and rotate the color original 2.
7 is transferred to the document holding plate 23. The coordinates of the reference point 32 of the document holding plate 23 at this time are displayed on the XY coordinate display device 33, and similarly input into a storage device (not shown). Next, the rotating arm 22
along the shaft 21 toward the scanner drum 20 side. At this time, when the rotary arm 22 passes the origin setting microswitch 38, the coordinate in the X direction is automatically converted to the X coordinate on the color scanner drum 20. Therefore, first XY
The rotary arm 22 can be moved to the same X coordinate position as the X coordinate value displayed on the coordinate display device 33.

The Y coordinate on the scanner drum 20 is determined by extending and contracting the rotary arm 22 so that the reference point 32 of the document holding plate 23 coincides with the reference line 36 of the drum 20, and setting the coincident angle as the zero angle. is rotated, and the rotation angle reading encoder 39 is operated so that the Y coordinate value displayed on the XY coordinate display device 40 as a curved surface coordinate matches the Y coordinate value previously displayed on the XY coordinate display device 33.

After matching the X and Y coordinates in this way,
At that position, the color original 27 is transferred onto the color scanner drum 20 and fixed with tape or the like. This color scanner drum is then attached to a color scanner and used for color separation.

Next, based on the coordinate information of the setup point input in advance into the storage device, the scanning head and color scanner are set up so that a light beam can be irradiated from the light source in the scanner drum 20 to a predetermined setup point. By moving the drum and detecting the signal level at each setup point, it is possible to set an appropriate setup value.

An example of a method for setting this setup value will be explained with reference to FIG. Note that although the following explanation uses the setting of highlight points as an example, it is of course possible to set shadow points and middle points in the same manner.

In FIG. 7, 51 is a light source, 20 is a color scanner drum, 27 is a color document, 54 is a scanning head, 55 is a photoelectric conversion element, and 56 is a color scanner drum.
log circuit, 57 is an average value circuit, 58 is a color computer, 59 is a lead screw, 60 is a scanning head movement motor, 61 is a cylinder rotation motor, 62 is an exposure cylinder, 6
Reference numeral 3 indicates a motor control section, 64 a display meter, and 65 a mirror.

First, the scanning head and the color scanner drum are moved so that a predetermined highlight point in the color document 27 can be irradiated with the light beam from the light source 1. The light beam irradiated onto this highlight point is reflected by the mirror 65 and reaches the photoelectric conversion element 55. The photoelectric conversion element 55 generates a signal according to the amount of light received, and after being subjected to predetermined processing in the log circuit 56 and color computer 58, the halftone dot (or density) at the virtual highlight point is displayed on the display meter 64. Note that the scanning light flux is 20 μm to 100 μm.
Since the spot diameter is extremely small, it is preferable to move the luminous flux 20 μm to 100 μm vertically and horizontally around the coordinate value of the highlight point in proportion to the spot diameter to obtain a highly accurate signal. The plurality of signals thus taken out from the scanning spot via the scanning head are subjected to processing such as counting, storage, and averaging in an average value circuit 57 to obtain an average value. After this average value is processed by the color computer 58, the halftone dots (or density) corresponding to the average value are displayed on the display meter 64.

Next, a highlight setup value is determined based on this display value, and normal setup work can be proceeded with.

As described in detail above, according to the present invention, it is possible to simultaneously measure the magnification of a color document and to affix the color document to the color scanner drum at the desired angle. Disassembly setup points can be determined easily and accurately.

[Brief explanation of the drawing]

1 and 2 are perspective views illustrating the relationship between the angle at which a color document is attached to the document drum and the output, and FIG. 3 is a document pasting device for a color scanner drum used in the method of the present invention. FIGS. 4, 5, and 6 are plan views showing a part of the apparatus shown in FIG. 3 for explaining the method of the present invention, and FIG. FIG. 2 is a block diagram illustrating an example of a method. 1... Original drum, 2... Original, 3... Base line,
4...Exposure drum, 5...Film, 6...Image, 7...Baseline, 8...Image, 9...Cursor,
11... Projection plate, 12a... Reference line, 12b...
Origin, 12c...X-axis, 12d...Y-axis, 13...
... Frame body, 14 ... Projection lens, 15 ... Appearance fixing plate, 16 ... Base line, 17, 18 ... Shaft, 1
9...Color scanner drum support device, 20...
...color scanner drum, 21...shaft,
22...Rotating arm, 23...Document holding plate, 24
...Light source, 25...Appearance, 26...Dragonfly, 27
...Color original, 28... Reference line, 31... Encoder, 32... Original holding plate reference point, 33, 4
0,41...XY coordinate display device, 34...Micro switch, 35...Y coordinate reference line, 36...X
Coordinate reference line, 37... Origin, 38... Micro switch, 51... Light source, 54... Scanning head, 55... Photoelectric conversion element, 56... Log circuit,
57... Average value circuit, 58... Color computer, 59... Lead screw, 60... Scanning head movement motor, 62... Exposure cylinder, 63... Motor control unit, 64... Display meter, 65 ……mirror.

Claims (1)

[Claims] 1. Project the format from below onto the digitizer table surface along a certain reference line, then place a color original on the table surface, match the magnification and angle of this format image with the color document image, and record the matched state. , the position information of the necessary separation setup point in the color document and the position information of the color document holding plate that transfers the color document from the digitizer table to the color scanner drum are determined by the coordinates on the digitizer table using the position indicating means. The color document is read as coordinates based on the reference point, and then the color document is transferred onto the circumferential surface of a color scanner drum whose rotation axis is parallel to the reference line while maintaining the above angle using the color document holding plate. , Paste the color original at a predetermined coordinate position on the circumferential surface of the color scanner drum based on the positional information of the color original holding plate read on the digitizer table, and then,
Based on the position information of the disassembly set-up points mentioned above, the scanning head and color scanner drum are moved so that the light source in the color scanner drum irradiates the light flux to the predetermined set-up points. A setup method characterized by detecting a signal level and setting an appropriate setup value.