JP2737145B2 - Image input device for layout scanner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a layout scanner system, and more particularly to a layout scanner image input device capable of automatically inputting only a necessary image area of a document when inputting an image. It concerns the device.

2. Description of the Related Art Conventionally, in an image input apparatus for a layout scanner, when image data is input from a document by a plate making scanner, it is necessary to input only a certain required image area. In general, in a layout scanner, input image data is temporarily stored in an auxiliary storage device such as a hard disk, and edited by a computer together with other data necessary for plate collection. In this case, in order to minimize the capacity of the auxiliary storage device, it is necessary to minimize the error between the input image data area and the required image area.

Hereinafter, a conventional method for designating a necessary image area will be described. For example, as shown in FIG. 3, the image portion is a picture of a person on the layout designation paper, and the necessary image area is 2
If represented by a rectangle with _two points A ₂ and B ₂ as diagonals,
Select reference point P ₂ is any point can be easily identified in the image area, the distance x ₂ from the reference point P ₂ in the allocation specified paper to each side of the rectangular in horizontal and vertical direction, y _2, respectively Measure. Further, the lengths of the sides of the rectangle having the points A ₂ and B ₂ as diagonals are measured as X ₂ and Y ₂ , respectively. Furthermore, the ratio of the dimensions of the image on these layout specified sheets to the dimensions of the original,
That is, the magnification data is set to α. From these data, a necessary image area on the original 2 fixed on the cylinder 1 of the layout scanner is designated as shown in FIG. x ₁ in the horizontal direction from _one to the rotational direction of the cylinder 1, to determine the image input start position a ₁ at a distance of y ₁ in a direction perpendicular. This x ₁ , y ₁
Is calculated by the following equation.

x ₁ = x ₂ / α, y ₁ = y ₂ / α When directly measuring the values of x ₁ and y ₁ , a scale or the like is used.

From the image input start position A ₁ determined by the above operations, Y ₁ in the vertical direction (main scanning direction), by scanning the distance X ₁ in the horizontal direction (sub scanning direction), the necessary image area image It can be input as data. Here, the values of X ₁ and Y ₁ are calculated by the following equations.

X ₁ = X ₂ / α, Y ₁ = Y ₂ / α [Problems to be Solved by the Invention] However, when image data is input by the above-described method, image input on document 2 starts. very laborious to determine the position a ₁ and the image input range, their measurement error is large, also their error as magnification increases increases. As a result,
The image input range is determined to be considerably larger than the required image area, and the capacity of the auxiliary storage device of the layout scanner is used more than necessary. For example, when a generally and prints the photos 10 cm × 10 cm, because the lowest resolution that can withstand the printing is 1 mm ² per 100 pixels, the image data of about 4M bytes are required, each 5mm youth properly outer frame The extra image data would be about 4.4 Mbytes, and the layout scanner would have to save and edit multiple such image data, so saving the capacity of the auxiliary storage would be economical. Is also very important in terms of work efficiency. Further, when the number of image input operations is increased, the operation efficiency is reduced, and the operation time is prolonged.
Generally, in a layout scanner, shortening of operation time is a very important problem.

As described above, in the conventional image input method of the layout scanner, there is a problem that the capacity of the auxiliary storage device of the layout scanner is used more than necessary, and the working efficiency is reduced.

The present invention has been made to solve the above-described problem, and when inputting an image in a layout scanner,
An object of the present invention is to provide an image input device for a layout scanner that can accurately input only necessary image data of a document and that can efficiently and easily perform the operation.

[Means for Solving the Problems] In order to achieve the above object, an image input device for a layout scanner according to the present invention sets a required image area on a layout designation sheet to have two points A ₂ and B ₂ as diagonals. a rectangular, the rectangular optionally with extraction with a reference point P ₂ easy point from the reference point P ₂ a distance of horizontal and vertical directions to each side of the rectangle and each x _2, y _2, rectangular The length of each side is X ₂ , Y ₂ respectively, α is a magnification which is a dimensional ratio between the size of the image on the layout designation paper and the document fixed on the cylinder of the layout scanner, and each data x ₂ , y ₂ , X ₂ , and Y ₂ are input, and these data are assigned to points A ₁ and B ₁ on the original corresponding to points A ₂ and B ₂ on the layout designation paper.
The horizontal and vertical distances x ₁ , y ₁ from the reference point P _1, which can be arbitrarily extracted, to each side of the rectangle within the rectangle having the diagonal of, and the lengths X ₁ , Y ₁ of each side of the rectangle Data conversion means for converting the data into distance data and outputting the data, means for determining and outputting data z of the total number of image reading timing pulses generated during one rotation of the cylinder based on magnification data α, and data conversion means distance data x ₁ and converts the pulse data for the mobile pick-up head of the layout scanner in accordance with this, converts the distance data X ₁ from the data conversion means into pulse data for necessary image region determination in the horizontal direction from horizontal distance and outputs each - pulse conversion means converts the distance data y ₁ from the data conversion means to the image read timing pulse count of the data y in accordance with this,
Vertical distance respectively output by converting the distance data Y ₁ from the data converting means into pulse data for necessary image region determination vertical - and pulse converting means, the image read timing pulse total data z and image read timing Image reading pulse generating means for generating an image reading start pulse at the timing at which the image reading start pulse is positioned at the head of a required image area each time the cylinder makes one rotation based on the pulse number data y, and horizontal distance-pulse converting means The pickup head of the layout scanner is moved to a horizontal position equal to the image input start position based on the pulse data for moving the pickup head from the camera, and the horizontal distance-pulse data for determining the required image area and the vertical distance from the pulse conversion means- Pulse data for determining required image area from pulse conversion means Scanner control means for controlling an image input by a layout scanner so as to input only image data of a determined required image area based on an image reading start pulse from the image reading pulse generating means. .

[Operation] In the image input device layout scanner of the present invention, optionally in the extraction easy reference points P in the rectangle that is the necessary image area in the allocation specified paper, and from the reference point P ₂ to each side of the rectangular Based on the horizontal and vertical distances x ₂ , y ₂ and the lengths X ₂ , Y ₂ of each side of the rectangle, the corresponding horizontal and vertical distances x ₁ , y ₁ , each of the rectangles on the document Distance data of the side lengths X ₁ and Y ₁ are automatically obtained by the data conversion means, and these data are passed through the horizontal distance-pulse conversion means, the vertical distance-pulse conversion means, and the image reading pulse generation means. It is provided to the scanner control means. The magnification data is also converted into image reading timing pulse total number data generated during one rotation of the cylinder and provided to the scanner control means. Next, a necessary image region extraction easy reference point P ₁ on the specified document, combined pickup head of an image input start information and the layout scanner is a direction perpendicular to the direction of rotation of the cylinder subscanning based on the distance data x ₁ in the direction, it is moved pickup head automatically to the image input start position a _1, in the main scanning direction is a direction parallel to the rotational direction of the cylinder on the basis of the distance data y _1,
Image input start information is moved automatically to the image input start position A _1. Further, a required image area is automatically determined based on the distance data X ₁ and Y ₁ , and the required image data is accurately and automatically input.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing a configuration example of an image input device for a layout scanner according to the present invention. In FIG. 1, reference numeral 3 denotes a cylinder of the layout scanner, on which the above-described original 2 shown in FIG. 4 is fixed. A rotary encoder 4 is attached to the cylinder 3. Reference numeral 5 denotes a pickup head of the layout scanner. The pickup head 5 can be moved by driving a ball screw 6 with a servomotor 7 with an encoder.

On the other hand, the image input device for a layout scanner according to the present embodiment includes a data input unit 8, a data conversion unit 9, an image reading timing pulse determination unit 10, a horizontal distance-pulse conversion unit 11, a vertical distance-pulse. Conversion means 12
Image reading pulse generating means 13 and scanner control means
14 and scanner driving means 15.

Here, as shown in FIG. 3, the data input means 8 sets the required image area on the layout designation sheet to a rectangle having _two points A ₂ and B ₂ as diagonals, and it is easy to arbitrarily extract within this rectangle. Is a reference point P ₂ , the horizontal and vertical distances from the reference point P ₂ to each side of the rectangle are x ₂ , y _2, and the lengths of each side of the rectangle are X ₂ , Y ₂ When the magnification which is the ratio of the size of the image on the layout designation paper to the original 2 fixed on the cylinder 3 of the layout scanner is α, these data distance data x ₂ , y ₂ , X ₂ , Y ₂ , and magnification data α
Is output. As this kind of data input means 8, for example, “Japanese Patent Application No. 61-6079 by the present applicant.
No.8 [Document Angle and Magnification Setting Device for Color Scanner] "

The data conversion means 9 receives the data x ₂ , y ₂ , X ₂ , and Y ₂ output from the data input means 8 and converts the data to points A ₂ and B ₂ on the layout designation sheet. The horizontal and vertical distances x ₁ , y ₁ , from the reference point P _1, which can be arbitrarily extracted in the rectangle having the corresponding points A ₁ , B ₁ as diagonals, to each side of the rectangle,
The data is converted into distance data having the lengths X ₁ and Y ₁ of each side of the rectangle and output.

On the other hand, the image reading timing pulse determining means 10 determines and outputs data z of the total number of image reading timing pulses generated during one rotation of the cylinder 3 based on the magnification data α output from the data input means 8. It is. Further, the horizontal distance - pulse converter 11 converts the distance data x ₁ from the data conversion unit 9 to the pulse data for the mobile pick-up head of the layout scanner in accordance with this, the distance data from the data converter 9
And outputs each convert X ₁ pulse data for necessary image region determination in the horizontal direction. Further, the vertical distance - pulse converter unit 12 converts the distance data y ₁ from the data conversion unit 9 to the image read timing pulse count of the data y in accordance with this, the distance from the data conversion unit 9 data Y ₁ Is converted into pulse data for determining a required image area in the vertical direction and output.

Further, the image reading pulse generating means 13 generates the image reading start pulse based on the image reading timing pulse total data z and the image reading timing pulse number data y at a timing such that the cylinder 3 is positioned at the head of the required image area. It is generated every time one rotation. Further, the scanner control means 14 receives the image reading timing pulse total data z, the pickup head moving pulse data and the required image area determination pulse data from the horizontal distance-pulse conversion means 11, and the vertical direction distance-pulse conversion means 12. A control signal for controlling an image input by the layout scanner based on the image reading timing pulse number data y, the required image area determining pulse data, and the image reading start pulse from the image reading pulse generating means 13. is there. Furthermore, the scanner driving means 15 drives and controls the layout scanner based on a control signal from the scanner control means 14.

Next, the operation of the image input device for a layout scanner configured as described above will be described.

The data x ₂ , y ₂ , X ₂ , Y ₂ output from the data input means 8
For example, the data x ₂ , y ₂ , X ₂ , and Y ₂ are converted by the data conversion means 9 into distance data on the original 2 fixed on the cylinder 3, that is, on the layout designation paper. point a _2, B ₂ a ₁ corresponding points on the original to the,
In the input image area rectangle of B ₁ and diagonal, the reference point P ₂
Point A ₁ from the extracted easy reference point P ₁ corresponding to the horizontal of the B ₁ to rectangular sides of the diagonal, the distance x ₁ in the vertical direction, y _1, and the rectangles of side length X _1, is converted into Y ₁ of the distance data. Further, based on the magnification data α output from the data input means 8, the image reading timing pulse determining means
Thus, data z of the total number of image reading timing pulses generated during one rotation of the cylinder 3 is determined, and is given to the scanner control means 14 and the image reading pulse generating means 13.

Next, in the horizontal distance-pulse conversion means 11,
Data conversion means distance data x ₁ from 9 is converted with the pulse data for the mobile pick-up head of the layout scanner response, by providing the pulse data to the scanner driving means 15 through the scanner control unit 14,
Go pickup head 5 by a distance x ₁ ball screw 6 is rotated by the number of the pulses, the horizontal direction (sub scanning direction)
Pickup head 5 is moved in the image input start position A _1.

On the other hand, in the vertical distance-pulse conversion means 12,
Distance data y ₁ from the data converter 9 is converted into the image read timing pulse count of the data y in accordance with this, the data y is supplied to the scanner control unit 14 and the image reading pulse generating means 13. Thereby, in the image reading pulse generating means 13, based on the image reading timing pulse total data z and the image reading timing pulse number data y, at a timing such that the image reading start pulse is located at the head of the necessary image area, Cylinder 3
Is generated every rotation. That is, the image reading start pulse in a general scanner, the cylinder 3 is the position of a line perpendicular to the rotation direction with respect to the image input start position A ₁
When the position of the pickup head 5 is reached during the rotation, the rotation occurs once per rotation, and when the image reading start pulse is generated, image input is started for the rotation.
Here, when the combined image input start information to the reference point P ₁ of FIG. 4, the need for the original 2 on the cylinder 3 when indicating the position of the image area, so that the second view of the B. Therefore, in order to input a required image area, it is necessary to move the image reading start pulse A to the head position of the required image area B. Therefore, in order to move the image reading start pulse A to the start position of the necessary image area B, the image reading start pulse is delayed from the image reading pulse generating means 13 by the value x of the pulse number represented by the following equation. D may be generated.

x = image reading timing pulse total data z−image reading timing pulse number data y Then, by giving this image reading start pulse D as an image reading start pulse A from the image reading pulse generating means 13 to the scanner control means 14, the image The image reading start position in the vertical direction (main scanning direction) of the data is
All the positions are specified. In FIG. 2, C indicates an image reading timing pulse.

In the horizontal distance-pulse conversion means 11,
Distance data X ₁ from the data converter 9 is converted into a pulse data representing the necessary image area in the horizontal direction is given to the scanner control unit 14. Furthermore, the vertical distance-
In the pulse converter 12, the distance data Y ₁ from the data converter 9 is converted into a pulse data representing the necessary image area in the vertical direction is given to the scanner control unit 14.

Thus, the scanner control means 14 obtains the image reading timing pulse total data z, the horizontal distance-pulse data for moving the pickup head from the pulse conversion means 11 and the pulse data for determining the required image area, and the vertical distance-
A control signal for controlling image input by the layout scanner based on the image reading timing pulse number data y from the pulse conversion means 12, the required image area determining pulse data, and the image reading start pulse from the image reading pulse generating means 13. by controlling the layout scanner is given to the scanner driving unit 15, the vertical direction (main scanning direction) and the horizontal direction (sub scanning direction) together, combined pickup head 5 to the reference point P _1, the reference image input start information by providing a point P _1, the range of the input image data in the rectangle with diagonal points a _1, B ₁ is entered correctly.

As described above, in the layout scanner image input device of the present embodiment, the reference point P ₁ , which can be arbitrarily easily extracted within the rectangle which is the necessary image area on the layout designation paper, and the rectangular shape from the reference point P ₂ Horizontal and vertical distance to each side
Based on x ₂ , y ₂ and the length X ₂ , Y ₂ of each side of the rectangle, the corresponding horizontal and vertical distances x ₁ , y ₁ on the document and the length X ₁ of each side of the rectangle on the document , Y ₁ are automatically obtained by the data conversion means 9, and these data are controlled by the scanner through the horizontal distance-pulse conversion means 11, the vertical distance-pulse conversion means 12, and the image reading pulse generation means 13. The magnification data is also converted into data of the total number of image reading timing pulses generated during one rotation of the cylinder 3 and is supplied to the scanner control means 14. extraction facilitating reference point P ₁ on the inner, aligned pick-up head 5 of the image input start information and the layout scanner, based on the sub-scanning direction which is perpendicular to the rotation direction of the cylinder to the distance data x _1, image beep until the input start position A ₁ Is moved up head 5 automatically, in the main scanning direction is a direction parallel to the rotational direction of the cylinder 3 on the basis of the distance data y _1, automatically moving image input start information to the image input start position A ₁ The required image area is automatically determined based on the distance data X ₁ and Y ₁ , and the required image data is input accurately and automatically.

Therefore, by extracting gives an image input start information combined pickup head 5 to facilitate reference point P _1, for a necessary image area of the original 2 can be accurately and automatically input, and required range of input data An error with the image area can be extremely reduced. As a result, the capacity of the auxiliary storage device of the layout scanner for storing input data can be reduced to a minimum, and the image input operation can be performed in a short time and easily. Shortening and simplification can be achieved.

[Effects of the Invention] As described above, according to the present invention, when inputting an image in a layout scanner, only the necessary image data of a document can be accurately input, and the work can be performed efficiently and easily. An image input device for a layout scanner can be provided so that it can be performed.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an embodiment of an image input device for a layout scanner according to the present invention, FIG. 2 is a timing chart for explaining the operation in the embodiment,
FIG. 3 is a diagram showing trimming specified by layout, and FIG.
The figure shows a document fixed to a cylinder of a scanner. 1 ... cylinder, 2 ... original, 3 ... cylinder, 4 ...
Rotary encoder, 5 ... Pickup head, 6 ...
... ball screw, 7 ... servo motor with encoder, 8 ...
... data input means, 9 ... data conversion means, 10 ... image reading timing pulse determination means, 11 ... horizontal distance-pulse conversion means, 12 ... vertical direction distance-pulse conversion means, 13 ... image reading pulses Generating means, 14 ... scanner control means, 15 ... scanner driving means.

Claims (1)

(57) [Claims] 1. An image input device for a layout scanner for inputting an image of a document, wherein a required image area on a layout designation sheet is a rectangle having _two points A ₂ and B ₂ as diagonals, and any rectangle within the rectangle is used. extraction with a reference point P ₂ the easiness, the horizontal and vertical distance from the reference point P ₂ to each side of the rectangular and x _2, y ₂ respectively, rectangle the length of each side respectively X ₂ , Y ₂ and α is a magnification that is a dimensional ratio between the size of the image on the layout designation paper and the document fixed on the cylinder of the layout scanner, and the data x ₂ , y ₂ , X ₂ , Y ₂ as input, a ₁ corresponding points of each of these data to the a _2, B ₂ points allocation specified paper on the document,
The horizontal and vertical distances x ₁ and y ₁ from the reference point P _1, which can be arbitrarily extracted within the rectangle having the diagonal B ₁ , to each side of the rectangle, and the lengths X ₁ and Y of each side of the rectangle Data conversion means for converting the distance data into _one distance data and outputting the distance data; and data z of the total number of image reading timing pulses generated during one rotation of the cylinder based on the magnification data α.
Means for outputting the determined, converts the distance data x ₁ from the data converting means into a pulse data pickup head moving layout scanner in accordance with this, the distance data X ₁ from the data converting means pulse converting means and the image read timing pulse number data corresponding to the distance data y ₁ from the data conversion unit - horizontal distance of outputting each converted into a pulse data for necessary image region determination in the horizontal direction converts to y, the vertical distance is outputted by converting the distance data Y ₁ from the data converting means into pulse data for necessary image region determination vertical - and pulse converting means, the image read timing pulse The image reading start pulse is determined based on the total data z and the image reading timing pulse number data y. An image reading pulse generating means which is generated every time the cylinder makes one rotation at a timing such as being located at the head of an image area; and the layout scanner based on pickup head moving pulse data from the horizontal distance-pulse converting means. Is moved to a horizontal position equal to the image input start position, and the necessary image area determining pulse data from the horizontal distance-pulse converting means and the required image area determining pulse from the vertical distance-pulse converting means are moved. Scanner control means for controlling image input by the layout scanner, so that only image data of the required image area determined by data is input based on an image reading start pulse from the image reading pulse generating means. For layout scanners characterized by comprising Image input device.