JPH02215266A - Original picture processor - Google Patents

Abstract

PURPOSE:To effectively extract the image of a trimming area by providing a preparing means to obtain scanning control data related to the trimming area, etc., of an original picture, a rotary table, a plane scanning type image scanning means, and the transmitting means of the scanning control data. CONSTITUTION:A designated trimming area 13a is normalized by points A-D, and a coordinates value is written to a recording medium 17 along with points E-G of an original picture 13. Further, even a projection magnification, a version number, etc., are stored, they are loaded on a computer 18, they are read with a key board 19, and a plane scanner 20 is controlled. The scanner 20 has a rotary table 21 and a scanning head 24. An original picture holder 22 has orthogonal marked lines PQ/PR. After the scanning control data are extracted, the original picture 13 is placed on a plate 22, positioned by the marked lines, and attached with a plate 23. The computer 18 rotates the rotary table 21 by an angle theta, and a trimming frame line AD is made parallel in a subscanning direction S. In such a condition, a head 24 is made to travel, the scanning is executed based on the control data of the storage medium 17, and the image information of the necessary area 13a can be extracted without excess nor shortage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used in printing plate-making work, etc., and comprises a preparation means, such as a projection device, for obtaining scan control data in advance regarding a trimming area, etc. of an original image to be reproduced; It relates to an original image processing device including a plane scanning type image scanning means, for example, a plane scanner, which photoelectrically scans the original image based on scan control data to extract image information of the trimming area, and in particular, the image information of the trimming area. The present invention relates to a device for effectively extracting.

[Conventional technology]

In printing plate-making work, an image obtained by trimming a partial area of an original image is recorded with desired dimensions, positions, and angles. This type of work has traditionally been done by manually cutting out the image and pasting it on a mount or transparent sheet for pasting the original image, but with the advancement of electronic scanning color separation image scanning devices, so-called color scanners, the original image An image scanning and duplicating device called a composing scanner has been developed which picks up image information of only a required area of the image and records a duplicate image of only that area at a desired position.

Furthermore, an image processing duplication apparatus called a layout scanner, which stores image information in a storage means such as a magnetic disk and records the image after making appropriate corrections, has also been put into practical use.

In these image duplicating devices, when a trimming area of an original image is scanned by an original image scanning device, it is desirable to mount the original image in a posture such that the direction of the frame line of the trimming area matches the scanning direction.

That is, for example, in FIG. 6, a line sensor (1) in which photoelectric elements such as CODs are arranged is relatively moved in the sub-scanning direction (S) to photoelectrically scan an original image (2).
When picking up the image information of the desired trimming area (3) in the trimming area (3), as shown in FIG.
) if the direction of the frame line matches the sub-scanning direction (S),
Among the many CCD elements arranged in line sensor (1),
The signals of the elements included in the shaded range (Y) may be extracted for the range (X) in the sub-scanning direction (S). In the case of Figure 6, the frame line of the trimming area (3) is set parallel to the side of the original image (2), so the side of the original image (2) must be aligned with the sub-scanning direction (S) when mounting. It's a good thing.

However, depending on the trimming state, the trimming area (3) indicated by diagonal lines may change from the original image (as shown in Figure 7).
It may be set at an angle with respect to the side of 2). In this case, if the side of the original image (2) is aligned with the sub-scanning direction (S), it is necessary to pick up all the image information in the desired trimming area (3).
), it is necessary to import image information for the range (4), which increases the signal amount and requires time and effort to cut out unnecessary image information in the dotted area (4) in the subsequent process, resulting in inefficiency. It is. In this case, the cropping area (3)
Align the original image (2) so that the frame line of
) is installed at an angle, it is possible to extract image information of only the trimming area (3) in a state similar to that shown in FIG.

A method of tilting the original picture in accordance with the tilt angle of the trimming area is described, for example, in Japanese Patent Application No. 62-2, which was filed by the present applicant.
There is a method described in No. 05113 (title of the invention: "Original image setting method and apparatus in a plane scanning type image scanning device"). This method uses a projection device to project an image of the original image onto a digitizer surface in a size equal to the desired reproduction size, and to obtain scan control data during photoelectric scanning in a scanner based on the coordinate values of desired plot points. In addition, the original image holder for attaching and holding the original image can be used commonly between the projection device and the scanner.
The original image holder loaded with the original image is first attached to the projection device, each required scanning control data is outputted and stored in an appropriate storage means, and then the original image holder is attached to the scanner while holding the original image. Then, a desired duplicate image is recorded by performing photoelectric scanning based on scan control data read out from the storage means.

Also, patent application No. 62-240, which is also an earlier application of the present applicant.
No. 932 (title of the invention "Original image holding device equipped with a scanning data storage device") includes a storage means attached to the above-mentioned original image holder, and scanning control data for each original image is output from the original image holder itself loaded with the original image. A means for facilitating work management is described.

[Problem to be solved by the invention]

The above-mentioned two prior inventions each have practical significance, but in order to maintain the state in which the original images are loaded in the yK image holder and sequentially attach it to both the projection device and the scanner, it is necessary to In order to process images one after another, it is necessary to have a large number of original image holders, which raises the problem of increased equipment costs. especially.

In the latter method of attaching a storage means to the original picture holder, f
Since the unit price of the M picture holder is high, there is a problem in that having a large number of these holders increases the cost burden.

[Means to solve the problem]

The means of the present invention has an original image holder on which the original image is placed in a flat shape, a preparation means for obtaining scan control data regarding a trimming area of the original image, etc. It has a second original image holder on which it is placed, and
The second original image holder is fixed, and has a rotary table in which the reference line is parallel to the scanning direction at the rotation origin position and can be rotated to any angle, and the second original image holder is fixed and has a rotary table that is rotatable to any angle, and a specific reference direction determined based on the scanning control data. the rotary table rotates by an inclination angle of the trimming area relative to
The present invention includes: a plane scanning type image scanning means configured to extract image information of the trimming area; and a transmission means transmitting the scanning control data to the image scanning means.

[For production]

The rotary table in the image scanning means such as a flat scanner is rotated in a predetermined direction by the inclination angle of the trimming area from its rotation origin position in accordance with the scanning control data obtained by the preparation means such as the projection device. A desired trimming area within the original image mounted on the original image holder coincides with the scanning direction. In this state, the original image is scanned, and at that time, image information of the trimmed area of the original image is extracted based on the scan control data obtained by the preparation means.

〔Example〕

FIG. 1 is a schematic diagram of an apparatus according to an embodiment of the present invention.

The projection device (11) as a preparation means has a configuration similar to that of a well-known photo enlarger, and an original image (13) mounted flat on an original image mounting part (12) serving as a first original image holder is exposed to an upper light source ( 14), and is projected and imaged onto the plane of the lower X-Y digitizer (16) by the lens (15).

This state is illustrated in FIG.

On the image projected onto the surface of the digitizer (16), a trimming area (13
Find the coordinate values of a). The trimming area (13a) is
Since it is defined by the leftmost point (B), rightmost point (D), topmost point (A), and bottommost point (C), the coordinate values of these four points are used as the position data of the trimming area (13a). .

These coordinate values as position data are written to a storage medium (17) as a transmission means such as a floppy disk as scanning control data for a plane scanner as a plane scanning type image scanning means in a subsequent process. Also, the original picture (1
3) Find the coordinate values of the three surrounding corners (E), (F), and (G),
Note that the two points (E) and (F), which are also written to the storage medium (17) as scan control data, also serve as position data indicating the horizontal direction as the specific reference direction.

Furthermore, the projection magnification determined based on the focal length of the lens (15) in the projection device (11) and the distance between the original image attachment part (12), the lens (15), and the digitizer (16), and the original image The number (13) or the plate number when a plurality of original images are collected into one printing plate are similarly stored in the storage medium (17) as scan control data. A storage medium (17) storing these scan control data is loaded into a computer (18) and read out by commands from a keyboard (19) to control image scanning in a flat scanner (20).

The flat scanner (20) has a rotary table (21) mounted on its upper surface that is rotated by an appropriate driving means, and a pair of upper and lower transparent plates (22) in the center of the rotary table (21).
) Attach the second original image holder consisting of (23).

The lower transparent plate (22) (hereinafter referred to as the lower plate) is fitted and fixed into a rectangular through hole formed in the center of the 5-turn table (21), and the upper transparent plate (23) (hereinafter referred to as The upper plate (referred to as the upper plate) is hinged to the trailing edge of the lower plate (22).

A scanning head (24) equipped with a CCD linear sensor and an optical system is installed inside the flat scanner (20) in accordance with a well-known flat image scanning device, and a rotating table is moved by a sleeping means (not shown). (21) Run in the left-right direction (S) along the lower surface. On the other hand, above the flat scanner (20) is an original image (13) attached to a second original image holder.
An appropriate light source (not shown) for irradiating is installed, and as the scanning head (24) runs, the original image (13) is photoelectrically scanned line by line and an image signal is output.

As shown in the third figure, the lower plate (22) of the second original image holder is marked with two orthogonal marking lines (PQ) and (PR). One marked line (PQ) corresponds to the − side (EF) of the original picture (13), and the other marked line (PR) similarly corresponds to the other side (EG). In addition, at the rotation origin position of the 1-turn table (21), the marked line (PQ
) is set to be parallel to the running direction of the scanning head (24), that is, the sub-scanning direction (S). Note that the rotational origin position is the position where the origin mark (M) attached to the scanner body and the mark (M) attached to the rotary table (21) shown in the third figure match.

The original image (13) for which the scanning control data has been output from the projection device (11) is taken out from the original image mounting section (12) and placed on the lower plate (22) of the flat scanner (20).
Position it using the jl lines (PQ) and (PR), close the upper plate (23), and install it.

Next, the computer (18) is operated and the storage medium (1
Based on the scan control data stored in 7), the trimming frame line (A
The rotary table (21) is rotated counterclockwise from the rotation origin position by the inclination angle (θ) of D).

In addition, the inclination angle (θ) is.

The coordinate values of point (A) are Oh+yx), The coordinate values of point (D) are Oh tyz) Then, it can be obtained using a linear equation.

As a result, as shown in the third diagram, the original image (13) attached to the second original image holder is moved along its trimming frame line (AD).
can be installed at an angular position where the angle is parallel to the sub-scanning direction (S).

In this state, the scanning head (24) is run and the storage medium (
Based on the scan control data of the scan head (24)
) Among the photoelectric elements arranged in rows, (Yl) ~ in Fig. 3
If the output of the element corresponding to the range (Y2) is selectively picked up in the range (X) to (x2) during the scanning stroke, the image information of the desired trimming area (13a) can be obtained without excess or deficiency. can be extracted.

In the above embodiment, the original image (13) is transferred to the projection device (11).
The original image (13) is attached to the original image mounting part (12) of the flat scanner (20) and the lower plate (22) of the original image holder of the flat scanner (20).
side (EF) (EG) and the marked line of the holder (PQ) (P
R) is used for visual positioning, but instead of this, a pin system commonly used as means for positioning film sheets in photoengraving work may be applied.

The original image (32) is positioned and mounted on the original image mounting part (12) of the projection device (11) in Fig. 4 and on the rotary table (21) of the flat scanner (20) in Fig. 5, respectively. It is a schematic diagram showing a state.

A pair of register pins (30) are installed on the original image mounting part (12), and a pair of register pins (31) are installed on the lower plate (22) of the rotary table (21) at the same intervals. Register pin (30) on the original image mounting part (12) side
corresponds to the specific reference direction in the present invention, and the register pin (31) on the 1st turn table (21) side corresponds to the reference line in the 1st invention, and when the 1st turn table (21) is at the rotation origin position. , parallel to the sub-scanning direction (S) of the flat scanner (20).

On the other hand, the original picture (32) is fixed onto the auxiliary sheet (33) using an appropriate means such as adhesive tape (34), and punched holes of the same diameter as the register pins (30) and (31) are formed at the same intervals. The original image (32) is positioned on the projection device (11) or the flat scanner (20) by punching a hole in the auxiliary sheet (33) and fitting the auxiliary sheet (33) onto the register pin (30) or (31). Can be installed.

inputting the required scanning control data in the projection device (11) into the storage medium (17), and the flat-plane scanner (20).
) based on the scanning control data in the rotary table (21
) rotation angle control etc. are the same as described above.

〔Effect of the invention〕

(1) Trimming area of M image Since photoelectric scanning can be performed in a predetermined direction, for example, in the main scanning direction or in the sub-scanning direction, it is possible to pick up only the image information of the desired trimming area.

(2) When moving an original image from a preparation means such as a projection device to an image scanning means such as a flat scanner, it is only necessary to transfer the original image and there is no need to transport the original image holder, reducing labor and transportation. There is no risk of damage such as scratches on the glass of the original picture holder.

(3) There is no need to prepare an original image holder for each of a plurality of original images, and it is sufficient to install one original image holder in each of the preparation means and the image scanning means, so that equipment costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing an original image and its trimming area in a projection device.
FIG. 3 is a diagram showing how to mount the original image shown in FIG. 2 on a flat scanner and how it is rotated, FIGS. The figure shows a conventional planar image scanning device. (3)...trimming area, (11)...projection device (preparation means), (12)...original image mounting section (first original image holder), (1
3)...Original picture, (14)...Light source, (
15)...Lens, (16)...X-Y digitizer, (17)...Storage medium (transmission means). (18) Computer (transmission means), (19)
····keyboard. (20)...Flat scanner (image scanning means), (2
1)...Rotary table, (22)...Lower plate (second original image holder), (23
)... Upper board (second original picture holder), (24)...
...Scanning head, (30) (31)...Register pin, (32)...Original image, (33)...
Auxiliary seat. (34)...Adhesive tape. v 2 ■ v31 Ritsuhai Zuhai No. 12 (1i) 4 Miik・() Flute ■ (Example of technique)

Claims (1)

[Claims] A first original image holder on which an original image is projected onto a plane;
It has a preparation means for obtaining scan control data regarding the trimming area of the original image in advance, and a second original image holder on which the original image is placed along the reference line, and the second original image holder is fixed and rotates at the rotation origin. The reference line is parallel to the scanning direction at the position and includes a rotary table that can be rotated to an arbitrary angle, and the rotary table is rotated by the inclination angle of the trimming area with respect to the specific reference direction determined based on the scan control data. An original image comprising: a plane scanning type image scanning means that rotates and is configured to extract image information of the trimming area; and a transmission means that transmits the scanning control data to the image scanning means. Processing equipment.