JPS59228651A - Trimming scanner - Google Patents

Abstract

PURPOSE:To obtain directly trimmed original image data by calculating variable power data from coordinate position data on two specific points on an original picture surface set on a read scanning surface and coordinate position data on two points which correspond to the two specific points of the original picture on an allocation base paper surface. CONSTITUTION:A trimming part is denoted as FT and trimming size is represented as dx and dy. When a controller 16 detects a reference point P1' by scanning original picture F, a pulse having width equal to the time Tdy required to move a scanning point by distance dy from the detection time t0 is generated at every scanning line period L to obtain a gate signal GT, and the generation of this pulse is repeated for a time equal to the time Tdx when the scanning point moves from a reference point PT in an X direction by the distance dx. Consequently, a gate 17 turns on every time the pulse of the gate signal GT appears to pass a picture signal SS, and a triming picture signal ST obtained by extracting some of said picture signals at specific timing is outputted, so that an unexposed film on a scanning drum 2 is exposed directly to a trimmed picture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trimming scanner that allows cropped image data to be obtained directly when scanning an original image, and in particular, to a trimming scanner that makes it possible to obtain trimmed image data directly when scanning an original image, and in particular, to eliminate the need to separately input magnification data when scanning an original image. Regarding the trimming scanner.

In order to print a color original image, it is necessary to create multiple separation plates, for example, three or four types, by separating the original image into specific colors. A so-called color separation scanner has been used in the past to perform color separation in the signal state.

However, with conventional scanners, it is difficult to arbitrarily select only a predetermined portion of the set six original images to read and expose image signals. Conventionally, a method has been adopted in which a mask version for trimming is created separately from the disassembled version created in , and trimming is performed from the disassembled version. There was a problem in that it required time and cost.

Therefore, as a sixth solution to this problem, in conventional scanners, prior to the reading exposure scan, the original image is roughly pre-scanned in advance to read the image signal, and this is used to reproduce the image for trimming. , the trimming range is determined on this reproduced hexavalent image plane to obtain the necessary gate signal, and by gating the large image signal read during read exposure scanning, it is possible to directly perform the trimmed exposure. 0 However, a cropping scanner has been proposed.
This conventionally proposed trimming scanner requires a dedicated reading device to read the image signal from the above-mentioned pre-scanning, and also requires a display device and image memory for trimming. This method has disadvantages in that it increases costs and furthermore requires a considerable amount of time for trimming the display surface.

! Separately from this, when reading a document with a scanner, measure the dimensions of the part of the document that should be trimmed in advance, taking into account the magnification of the entire scanner, and use this dimension data and the position that should be trimmed on the scanner. There is also a known method of specifying p using a keyboard or the like before reading the image data.

However, this method has the drawback that it requires a great deal of skill and time to measure dimensions and specify positions. The large image data input means for reading the data is provided with a means that can select any point on the document surface and generate position data, and the layout position data of the image on the layout mount surface and the variable magnification of the image are provided. The range to be read on the document surface is calculated from the data, the position data of a specific point in the image, and the position data of the corresponding specific point on the document loaded in the image data input means, and the image data reading system is calculated. When is this image cropped so that large image data can be obtained directly? The system is designed to perform layout according to the specification of the above-mentioned layout position data.
This invention has been proposed by the present applicant as invention No. 68591.

By the way, when trimming using such a system, it is necessary to measure the size ratio between the original image and the finished image, that is, the scaling ratio, and input this scaling ratio data in advance as control information for the system. Therefore, in the above-mentioned conventional system, prior to the trimming operation, the magnification ratio is measured in advance to obtain the necessary magnification ratio data, and then the data is input to an appropriate input device, for example, the layout position data is read out from the layout board. The purpose of the present invention is to overcome the above-mentioned six disadvantages of the prior art. All the data necessary for trimming, including variable magnification data, can be obtained by simply specifying multiple points on the original screen and multiple points on the layout sheet after setting it in the reading scanning state. The purpose of the present invention is to provide a cropping scanner that enables the user to immediately obtain cropped original image data.

To achieve this objective, the present invention provides coordinate position data of two specific points on the original screen set on the reading scanning surface,
The feature is that the variable magnification data is calculated by calculating the coordinate position data of the two points -fc corresponding to two specific points of the original image on the layout mount surface. Examples will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which the present invention is applied to a scanner that performs reading scanning and exposure scanning simultaneously.
For example, in the figure, ■ is a reading scanning drum, 2 is an exposure scanning drum, 3 is a reading head, 4 is an exposure head, 5 is a drum drive section, 6 is an image signal processing section, 7 is a film exposure section, and 8 is Magnifying glass, 9 is rotary encoder, 101'j
:IJ near encoder, 11 is data tablet, 1
2 is a layout mount, 13 is a cursor, 14 is a menu area,
15 switches, 16 a control device, and 17 a gate.

Note that F indicates the original picture (), ilm) to be trimmed.

The reading scanning drum 1 and the exposure scanning drum 2 are connected to a drum driving section 5.
The drum IK is rotated at a predetermined constant speed, and the original image F held by the drum IK and the unexposed film (not shown) held by the drum 2 are moved in the line scanning (main scanning) direction.

The reading head 3 and the exposure head 4 move continuously at a speed (not shown) or at a predetermined speed to scan the surface of the drum 1.2. At this time, the image signal S read from the original image F by the reading head 3 is subjected to predetermined processing in an image processing unit (also called a color computer, etc.) 6 and becomes a hexavalent image signal Sg. After a predetermined portion is extracted and becomes a trimmed image signal ST, it is supplied to the film exposure section 7, and the exposure head 4 exposes an image onto an unexposed film (not shown) held on the drum 2. , color separation is performed to obtain an exposed film for large plate making. Therefore, the operation of the parts described above is the same as that of a normal scanner when the gate 17 is open. 1 and along the vicinity of the surface of the drum 10 so that the original image F stuck and held on the surface of the drum 10 can be observed in an enlarged manner.

The rotary encoder 9 indicates the direction of rotation of the drum l;
It functions to detect a position along the circumferential direction and generate position data py corresponding to the position.

The linear encoder 10 detects the position of the magnifying glass 8, and position data P representing the position parallel to the axial direction of the drum 1.
It works to generate X.

The data tablet 11 is also called a tablet digitizer, etc., and it specifies a point on its surface with a cursor 13, and expresses the position of that point in rectangular coordinates.
, Py 'i controller, and inputs various data necessary for the operation of the scanner from the menu area 14 prepared on the surface of the switch 15. The control device vi16 is not a computer or the like, but controls the entire system and processes various data.The gate 17 is an analog gate capable of gating the image signal 88, and receives the gate signal GTK supplied from the control device 16. It operates accordingly to obtain a trimmed image signal ST obtained by extracting a part of the image signal SS at a predetermined timing.

Next, the operation of this example will be explained.

First, as shown in FIG. 2, the iK layout mount 12 is set at a predetermined position on the data tablet 11. This layout mount 12
Indicates the border iK that specifies the entire trimming range of the document to be laid out, and the outline of the image contained within it.
A simple figure G is drawn.

Therefore, the next time, the cursor 13 is moved and position data on the ruled line is input to the control device 16. That is, when the trimming range is a rectangle as shown by the ruled lines in the figure, the mark of the cursor 13 is sequentially moved to the point PI at the upper left corner of this rectangle and the point P2 at the lower right corner. , and calculate the position data of these points P1 and Pz (PI
: Xi l y□), (Pz:x2 + ”12
) t'' is input to the control device 16, and the position data (x B + 3' B ) of a specific point Pa of the figure G is input.The specific point Pa is the same point in the pattern of the original image F. It is necessary to choose a point where the parts can be easily identified], and if the pattern is large, for example, if it is a person's face,
All you have to do is select the inner corner of the eye in figure G.

Next, select another specific point P from the figure G in the same way.
Select bt and its position data (xb.

7b) Enter i. Therefore, for the figure G, the position data of the two specific points Pa and Pb are input.

In this way, three points PI + Pz + P from layout mount 9
a+Pl) position data XI + X2 + xa
+ xb')' 1 + 72 + 78 + yb
After completing the capture, as shown in FIG. 3, move the drum 1 and the magnifying glass 8 while looking through the magnifying glass 8 to find a point corresponding to the specific point Pa on the layout board 120 figure G. P
a', Tsumashi In this case, the inner corner of the person's eyes is the original image F.
A heading is drawn from among the pictures, and it is positioned at the center of the field of view of the magnifying glass 8. At this time, use a magnifying glass 8 in which, for example, a cross-shaped marker appears at the center of its field of view, and align a specific point p,, f, such as the inner corner of the person's eye, with this marker M, as shown in Figure 4. All you have to do is move the drum 1 and magnifying glass 8 and stop them.

In this way, when the specific point pa'v of the original image F is aligned with the center of the field of view of the magnifying glass 8, the switch 15 is operated to supply the store signal STk to the control device 16, and the data py from the rotary encoder 9 and the linear Data PX from the encoder 10 is taken into the control device 16, and the control device 16 thereby receives data (PX) representing the position of the specific point Pl.
a':XalYa)'t*! u can be included.

Similarly, point P corresponding to another specific point PbK of figure G
Select b' and its position data (Pb':Xb.

Yb) is imported.

Next, the control device 16 uses these position data X1+X
2 + Xa+ Xb+XB , xb, )'t +y2
Calculations are performed based on +ya, yb, Ya, and Yb to calculate the points P□/ and P2' necessary to set ' in the trimming range of the original image F, as shown in FIG.

Here, it goes without saying that the trimming range ' should be designated by the ruled lines KK of the layout mount 12 shown in FIG.

Now, the position data of point P' is (xl, y), point P2
If the position data of ' is (X'2 + Yz) and the magnification ratio when reading image data from the drum l is α, then the relationship between these data is as follows.

x2 '-XI -α (X2-xl) ・-・-
(1) y2-y□=α (Y2-Y□)...
・(2)xB−x1=α (X, −X,) ・・・
... (3) X2-XB-α (X 2 X a )
・Old” -(4)ya-y, 工α (Ya-Y,)
-・-・-(5)y2-ya-α (Y2 Ya
) --(6)xb-Xa-α (Xb
a) ......(7)yb-ya-α (Yb
Ya)...(8) Therefore, from the relationship of these equations (1) to (8), the magnification ratio α and

and position data x1 representing the points P0' and P2' necessary for fully specifying the trimming range. y□+X 21 Y
2 can be easily found.

After completing the calculation of the point "P2" t-table position data in this way, the scanner starts reading the image data, and at this time the control device 16 calculates the hole position data X as described above.
□, Y□, x2. Figure 3 shows Vζ by y2 and six original pictures F
The film is exposed only during the scanning period of the trimming range K''c.

That is, when the control device 16 starts main scanning, the detection of this reference point P4' generates a gate signal GT', operates the gate 17 at a predetermined timing, extracts a part of the image signal Ss, and generates a trimmed image. The signal ST is extracted and exposed to the unexposed film by the full exposure head 4, so that the trimmed separation plate is immediately exposed.
The operation at this time will be explained using timing charts shown in FIGS. 5 and 6.

In FIG. 5, the six ranges specified by the trimming marks of the original image F, ie, the trimming portion 'rFT, and the trimming size are dxl dy.

Then, the image signal SS obtained by scanning the original image F has a waveform as shown in FIG. 6, for example. In addition, in this Figure 6,
L is the period required for the scanning drum 1 to rotate once;
This is the scan line period.

In this state, the control device 16 detects the reference point P, ``k'' as described above, and the scanning distance dlr from that time t.
A pulse with a width equal to the time Tdy required to move the gate signal G
T, and the scanning point is X from the reference point PT to the generation of this pulse.
The control is returned for a time equal to the time Tdx for moving a distance dX in the direction.

As a result, the gate 17 is turned on every time a pulse of the gate signal GT appears, allowing the image signal Ss to pass through, and a part of it is extracted at a predetermined timing and the trimmed image signal S
Therefore, the trimmed hat image is directly exposed to the unexposed film of the scanning drum 2.

The exposure state of the scanning drum 2 to the unexposed film when the gate 17 is off may be arbitrarily determined depending on the trimming plate creation conditions.
For example, it may be left unexposed or completely exposed.

Therefore, according to this embodiment, by simply specifying multiple predetermined portions of the original image F mounted on the drum IK and the layout mount 12, the troublesome magnification and trimming of the original image is automatically performed. The trimming operation in the color separation operation can be carried out arbitrarily and easily, and a large, trimmed image can be immediately obtained at a predetermined magnification.

In the above embodiment, the reading scan of the original image and the exposure scan of the unexposed film are performed at the same time, but the gate 17 extracts the hole trimming image signal STk.
Needless to say, the information may be stored in a memory such as a disk pack, and read from this memory and used as necessary.

Next, the effects of the present invention are listed below.

■ There is no need to calculate the magnification of the document, which was conventionally required prior to color separation using a scanner, and trimming can be started on the edges, improving work efficiency.

■ Unlike the conventional process, there is no need to create a mask plate when trimming separated plates of color originals, so the amount of mask film used in plate-making work is reduced, and it also helps speed up the work. .

■ If the cropping scanner according to the present invention is used for input in a computer layout scanner system equipped with a large magnetic disk drive, it is only necessary to hold the data of only the large cropped image as the input image, and the amount of data to be held can be reduced. Therefore, the magnetic disk back can be used effectively.

■ Compared to the case of performing trimming processing using a layout scanner system, the present invention allows trimming to be performed more easily and simply, and the system configuration is inexpensive as it does not require any equipment. It has the advantage of being done.

By the way, apart from the above-mentioned effects, the present invention can also be applied to the following situations.0 There are cases where a computer layout system is used to perform rotation processing on a picture input from a scanner and layout it. However, in cases like this, we need data on how much angle the input pattern can be rotated.
Therefore, in the past, operators had to measure the inclination angle of the pattern on the layout board using force and holes. However, by using the method according to the present invention of associating two points on the mount with two points on the manuscript, the inclination angle of the image when it is laid out can be set at the time of inputting the image, which saves work. It can be done very efficiently.

As explained above, according to the present invention, there is no need to measure the magnification ratio for the original in advance, and the trimming operation can be started immediately to obtain cropped image data, which is a drawback of the prior art. However, it is possible to easily provide a trimming scanner that can sufficiently reduce the time and cost required for trimming.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a trimming scanner according to the present invention, FIG. 2 is an explanatory diagram showing an example of position data input operation using a data tablet, and FIG. 3 is a block diagram showing an example of inputting position data of a document on a drum. FIG. 4 is an explanatory diagram showing an example of the operation. FIG. 4 is an explanatory diagram showing an example of the operation of specifying a specific point. FIG. 5 is an explanatory diagram showing a list of methods for detecting the trimming range of the document on the drum. FIG. 6 is an explanation of the operation This is a timing chart for. l...reading scanning drum, 2...exposure scanning drum, 3...reading head, 4...
Exposure head, 5...Drum drive unit, 6...
...Image signal processing section, 7...Film exposure section,
8...Magnifier, 9...Rotary encoder, 10...Linear encoder, 11...
... Data tablet, 12 ... Layout mount, 13 ... Cursor, 14 ... Menu area, 15 ... Switch, 16 ...・・・
Control device, 17...Gate, F...Original picture. Figure 10 Figure 2

Claims (1)

[Claims] In a trimming scanner that is equipped with an image signal gating means that operates with a gate signal synchronized with the scanning of the original image and directly obtains a trimmed image signal when reading the original image, specifying an arbitrary point on the scanning surface of the original image. a document image position data generating means for specifying an arbitrary point on the layout sheet surface and generating the coordinate position data; Calculating means for calculating scaling factor data based on the coordinate position data of the point and the coordinate position data of a plurality of points corresponding to the specific plurality of points on the layout mount surface, and calculating the scaling factor data based on the scaling factor data. A trimming scanner characterized in that it is configured to obtain the above gate signal.