JPS61149952A - Automatic trimming layout method of print engraving - Google Patents

Abstract

PURPOSE:To easily obtain an accurate layout in a short time without requiring any special display monitor by specifying a trimming range on the basis of information obtained by an allocation position data generating means and inputting image data according to allocation position data. CONSTITUTION:An original 2 is fitted around a scanning drum 1 to which a rotary encoder 3 is fitted to read image data. A linear encoder 4 for generating axial position data on the drum 1 is combined with a scanning head 13 to obtain position data on the scanning head on the drum 1 by encoders 3 and 4. This data is sent to a controller 5 to which a memory 6, a data tablet 7, and a trimming range projecting device 11 are connected together with the image data from the original 2 and then stored in the memory 6. Further, allocation base paper 8 is set on the tablet 7 and magnification is inputted to the controller 5 with a cursor 9 by using position data on the allocation base paper and the numeric data input element of a menu area 10. Consequently, the position data and allocation information on the magnification are inputted as signals to the trimming range projecting device.

Description

[Detailed Description of the Invention] (Technical Field of the Invention) This invention relates to an automatic trimming layout method for printing plate making,
In particular, the present invention relates to a method of trimming image data read from a document and laying it out at a desired position.

(Technical Background of the Invention and Problems thereof) In recent years, layout apparatuses that use computers to perform layout work necessary for printing plate making have come into widespread use.

In this device, a document is generally mounted on a rotating drum type scanner, the document surface is scanned, the read image data is stored in a memory such as a -H magnetic disk, and the stored contents are used for subsequent layout processing. It is now possible to do this. That is, first, the image data that has been imported into memory in advance is read out and displayed on the display screen, and the cursor image representing the trimming range and the image of the document are arbitrarily moved on this screen to the position specified on the layout sheet. The patterns of a predetermined original are inserted one after another, thereby trimming the necessary range of the original image, and allocating this to a designated position on the image surface of one page.

However, with this method, it is difficult to specify the position on the display screen, requiring skill and time, and it is easy to cause positional errors. Therefore, accurate layout is difficult, or special functions for layout are required. Since a display device is required, the device becomes expensive.

In addition to the above method, when reading the original image with a scanner, there is also a method in which the dimension data of the part of the original to be trimmed and the position to be trimmed on the scanner are specified in advance using a keyboard, etc., and one image data is read. Are known. However, this method also has the problem that it requires a great deal of skill and time to measure dimensions and specify positions.

(Object of the Invention) This invention has been made in consideration of the above points, and its object is to provide automatic trimming that allows easy and accurate layout in a short time without requiring a special layout display. The purpose is to provide a layout method.

(Summary of the Invention) The present invention includes an image input means for reading an image from a document, a layout position data generating means for generating layout position data of an image on a layout board, and a method for projecting a trimming range onto a drum. In the automatic trimming layout method for printing plate making of a layout system comprising a trimming range projection means, a trimming range of the original size is projected onto the drum by the trimming range projection means based on the information obtained by the allocation position data generation means. By projecting, you can specify the trimming range of image data,
This trimmed image data can be laid out directly from the original in accordance with the designation of the layout position data using image data input means.

(Embodiment of the Invention) Fig. 1 shows an example of a configuration for carrying out the method of the invention.l is a scanner as an image data input means, and an original 2 is set on its scanning drum and an image is A rotary encoder 3 is attached to the scanning drum that takes in data. A linear encoder 4 for forming axial position data of the scanning drum is associated with the scanning radar 13 of the scanner 1, and a rotary encoder 3 and a linear encoder 4 form the scanning head position data on the scanning drum. It can be taken out. This position data is given to the control device 5 together with the image data from the original. In addition to this scanner, the control device fi5 is connected with a memory 6, a data tablet 7, and a trimming range projecting device 11 as a trimming range projecting means. The image data extracted by the scanner l is stored in the memory 6.

A 1-allocation mount 8 is set on the data tablet 7 as 1-allocation position data generating means, and the 1-allocation mount 8 is displayed using the cursor 9, while the menu area 10
The magnification ratios are respectively inputted by numerical data input elements and given to the control unit 5. Here, the signal that the control device N5 sends to the trimming range projection device 11 is formed based on the input of the layout information containing the position data and magnification ratio inputted by the cursor 9 and the numerical data input element on the data tablet 7. Ru.

FIG. 2 explains an example of a trimming range projecting device, in which the trimming range projecting device provided inside the drum 31 receives a signal given from the control device 5 with the document 2 pasted on the drum 31. Accordingly, the trimming range 3 is projected onto the drum 31 by laser light or the like.
2. Next, the method of the present invention implemented using the configurations of FIGS. 1 and 2 will be described. first.

The layout mount 8 is set at a predetermined position on the data tablet 7 at a predetermined angle. Then, the position data of a predetermined point on the layout sheet 8 is inputted to the control device fi5 using the cursor 9.

For example, when trimming a document into a rectangle, position data is input for two points: the left corner, the corner, and the lower right corner of this rectangle. Thereafter, the magnification ratio is input using the font data input element in the menu area IO. These input data are given to the control device 5 and stored therein, and are also given to the trimming range projection device 11 after being subjected to arithmetic processing. Based on this input information, the trimming range projecting device 11 projects the trimming range 32 of the document 2 onto the drum 31. here,
Original 2 and trimming range 3 that are still attached in advance
The positional relationship between the drum 31 and the trimming range projecting device 11 is not consistent with that of the drum 31 and the trimming range projection device 11, respectively. By moving the trimming range 32 of the original 2, the trimming range 32 of the original 2 is determined. In this state, the position coordinates of the trimming range 32, the position coordinates of the input start point, etc. are input to the control device 5 by the rotary encoder 3 and linear encoder 4, so that the layout position on the layout sheet and the document on the scanning drum are The specified trimming range can be determined by matching the positional relationship between the two. Then, scan the original 2 with the scanner l,
Image data is read only when scanning within the trimming range. This allows the trimmed original image data to be imported.

This image data is stored in the memory 6, and also in the memory 6.
Control device according to the allocation specification information stored in the! Perform layout on i5.

The result is stored in memory 6. At this time, if you specify the range that the scanner captures to be a little larger than the trimming range 32, taking into account the margin, then if you want to correct the trimming range because the position of the document is inaccurate, you can The position can be finely adjusted during this layout without any position correction.

By using the contents of the memory 6 stored in this manner, automatic plate making can be performed.

Figure 3 and Figure fJS4 explain the projection position coordinates when the trimming range projection device projects onto the drum 31.
, z, and 0 into a two-dimensional cylindrical coordinate system shown in FIG. 4, the direction in which laser light or the like is irradiated onto the drum surface is determined. First, the surface of the drum 31 is developed and shown in two-dimensional cylindrical coordinates as shown in FIG. 4, where when the radius of the drum is 1, θ can be taken on the vertical axis.

Therefore, the figure on the drum surface is expressed as f(θ, z)=0 (1). Here, X, 7. If θ is expressed using Z, then the figure on the drum surface will eventually be expressed by equation (1) and (
2) From Eq. Now, for example, if we consider the case of drawing a circular figure 33 with a radius of r on a drum of radius r, in the cylindrical coordinate system of Fig. 4, the coordinates of one figure 33 are θ2 + 22 = 5L2... ...
(Since it can be set as 0, when formula (4) is converted into coordinates on the drum using formulas (2) and (3), the following is obtained.

If the trimming range projection device 111 projects a laser beam or the like onto the drum 31 so as to satisfy the equation (5), the desired trimming range will be shown.

(Effects of the Invention) As described above, according to the present invention, it is possible to easily create a trimming layout without problems such as the need for a special display or the need for a great deal of skill. Also, to specify the trimming range of the original pasted on the drum,
Since it is only necessary to align the trimming range projected on the drumstick with the document, it is possible to provide an automatic trimming layout method for printing plate making that is inexpensive, easy to use, and greatly improves productivity.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a device for carrying out the method of the present invention, FIG. 2 is a diagram for explaining a trimming range projecting device, and FIGS. 3 and 4 are diagrams for explaining projection position coordinates. It is a diagram. DESCRIPTION OF SYMBOLS 1...Scanner, 2...Document, 3...Rotary encoder, 4...Linear encoder, 5...Control device, 6...Memory, 7...Data tablet, 8...
... Layout mount, 9... Cursor, 10... Menu area, 11... Trimming range projection device, 13...
To document scanning Rad, 31...Drum, 32.33...
trimming range. Applicant's agent Yu Yasugata Sanbon l Figure

Claims (1)

[Claims] Image input means for reading an image from a document, layout position data generation means for generating layout position data of an image on a layout board, and trimming for projecting a trimming range onto a drum. In the layout system, the trimming range of image data is determined by projecting a trimming range of the original size onto the drum by the trimming range projecting unit based on the information obtained by the layout position data generating unit. An automatic trimming layout method for printing plate making, characterized in that the trimmed image data is laid out directly from the original by image data input means according to the designation of the layout position data.