JPS59229969A - Correcting device of original attachment angle for scanner - Google Patents

Abstract

PURPOSE:To perform correct trimming by correcting the holding angle of an original on the surface of a rotating drum on the basis of an image of the original and a linear image which are displayed on a monitor. CONSTITUTION:A base paper 15 to be assigned is set at a specific position on a data tablet 14, and a horizontal or vertical reference line drawn on the base paper 15 is selected. Then, the line is pressed with a cursor 16 to input its position data to a controller 10. The controller 10 processes the position data to calculate the angle to the horizontal or vertical reference line on the base paper 15. A mark is displayed on the monitor 13 on the basis of the calculation result. Then, an original F is attached to the drum 1 temporarily and the drum 1 and a cylindrical surface picture readout part 3 are moved properly so that a part to be trimmed is within the image pickup range of a readout part 3. Further, the both are put closer to each other then fixed so as to position the original F on the drum 1 near the light incidence end of the readout part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating drum type printing plate making scanner,
In particular, the present invention relates to a scanner document mounting angle correcting device that allows the document mounting angle to be easily and accurately adjusted to the rotating drum of the scanner in accordance with the specification of the layout board.

In recent years, layout systems that use computers to perform layout work essential to printing plate making have come into widespread use. And in such a system, in general, ii! A rotating drum-shaped scanner is used to read all of the i11 elephant data from the λfuku.
The captured artist data was temporarily stored in a memory such as a magnetic disk pack in preparation for subsequent processing.

By the way, the above-mentioned layout work is performed by trimming only the necessary range of the document surface and specifying where to place it on the screen of one page. , Retrieve and display the artist data imported into the above memory, move the cursor/I/image representing the trimming range, one image of the original, and the entire display tooth edge surface arbitrarily, and place it at the position specified on the layout board. Insert the pictures of the specified manuscript one by one (I took the method).

Therefore, in this conventional method, positioning work on the display image plane requires skill and time, and errors τ are likely to occur in positioning, requiring an accurate layout system or a display device with special functions for layout. This has the disadvantage that it tends to be an expensive system because of the high cost.

Therefore, in order to eliminate the drawbacks of this conventional method, we have developed a means that can capture position data at any point on the scanning drum surface of the scanner, and a means that can capture position data at any point on the layout sheet surface. By using the position data taken from a specific point on the image of the document mounted on the scanning drum and the position data taken from a predetermined point on the layout paper surface σ), the original 4
1.4 side σ) Calculate the data representing the trimming range,
For example, a method in which cropped σ) image data can be directly obtained during reading and scanning is disclosed in Japanese Patent Application No. 57-1685.
No. 91 is proposed. Since this proposal is automatically executed, layout work including trimming work can be done easily and in a very short time.

By the way, according to this proposed method, the positioning of the image on the document necessary for calculating the trimming range is performed using position data of a predetermined point in the document on the scanning drum and a predetermined point on the layout sheet. This is done automatically by simply importing the image, making the trimming work extremely easy. However, the trimming process is performed automatically by simply importing the original 41M image drawn on the layout board, and the original image placed on the scanning drum. If the tilt angles are not the same, there is a problem that the cropped image will have a tilt angle different from that specified on the layout sheet. Therefore, in this proposed method, When a document is mounted on a scanning drum, it is necessary to position the document so that its inclination angle matches the inclination angle of the figure on the mount as accurately as possible.

However, with conventional scanners, the work to match this inclination angle must be performed by comparing the graphics on the layout board and the original image on the scanning drum surface, which is quite difficult and requires skill. Moreover,
It is not possible to obtain sufficiently accurate angle alignment.

In addition, even in layout systems using computers that are commercially available, a drum scanner is usually used as an input device for both types of data, so image data due to irregular tilt angles when loading the original are affected. The uptake of the data has become a major problem that needs to be resolved.

In view of the above-mentioned circumstances, it is an object of the present invention to correct the mounting angle of a scanner using pressure so that it is easy to set the inclination angle that correctly matches the specification of the layout sheet when loading the original onto the scanning drum. We are in the process of providing equipment.

In order to achieve this object, the present invention displays an image representing the inclination angle of the IJX disaster specified on the layout sheet and an image of the original image on the scanning drum on the same monitor surface so that they can be compared. Let the point tl be the ridge.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a document angle correction device for a scanner according to the present invention will be described with reference to the drawings.

Fig. 1 is a block diagram showing an embodiment of the present invention. In Fig. 1, 1 is a reading scanning drum, 2 is a light (〃), 3 is a cylindrical surface acupuncture receiving part, 4 is a light guiding part, 5 is a photoelectric conversion unit, 6 is a data selector, and 7 is an analog/digital converter (A/
D), 8 is a bus driver, 9 is a buffer memory, 10 is a control device, 11 is an input/output open side (device), 12 is an image memory, 13 is a monitor, 14 is a data tablet, 15
16 is a cursor, and 17 is a menu area. Note that F represents a document such as a film.

The reading scanning drum l (hereinafter simply referred to as drum) is a reading short-hole drum that constitutes an ordinary printing plate-making scanner, and it scans the image from the original by its own rotation and the direct movement of the reading head (not shown). f Functions to read urine data. If the embryo is not read and scanned, it can be freely removed from the rotating shaft, and when it is released from the rotating shaft, it can be freely rotated by hand or the like.

The cylindrical image reading section 3 and the light guiding section 4 receive light from the photoelectric device 2 that has passed through the document F mounted on the surface of the drum J.
It functions to take out each point of the original +=k' independently, thereby decomposing the image of the original F into each pixel and guiding the light of each pixel to the photoelectric conversion unit 5. For example, the second As shown in Figures (a) and (b), it is composed of an optical waveguide 3a such as several optical 7-eyepers, and its light input end 3b is arranged in a curved shape according to the surface shape of the drum 10. It is.

During correction, the light incident end 3b is tilted so that it is held at a distance of several meters from the surface of the original 1.

The photoelectric converter 5 is attached to the end opposite to the light input end 3b of the mantissa optical waveguide 3a constituting the cylindrical image reading section 3 and the light guide section 4, that is, the light exit end, and is connected to each light guide. It is made up of a plurality of photoelectric conversion confections including photodiodes and the like for converting light passing through the wave tube 3a into electrical signals.

The data selector 6 functions to sequentially select and extract each photoelectric conversion element in the photoelectric converter 5 according to a predetermined order.

The bus driver 8 digitizes and accepts each pixel (i number 8p'5f: A/D 7) selected by the data selector 6, and sequentially stores it in the buffer memory 9. Each time data for the number of pixels is stored, it is read out and transferred to the control device 101-
It works to

The image memory 12 functions to store the artist data t11 read out from the buffer memory 9, and to store image data taken from a predetermined range of the original by the image reading section 3 on a cylindrical surface.

The monitor 13 serves to produce an image of the original F based on the artist data stored in the image memory 12.

The data tablet 14 is also called a tablet digitizer, and can be used to capture arbitrary points on its surface. cursor 1
6, and the position data representing the position of that point in rectangular coordinates 1) It functions to generate X, Py, and further inputs the necessary data to the control device 10 from the menu area 17 prepared on its surface. It works to make things happen. Note that the control device IO is composed of a computer, etc., and is used to process various data and control other devices.

Next, the operation of this embodiment will be explained.

First, as shown in FIG. 3, the layout mount 15 is set at a predetermined position on the data tablet 14. This layout mount 1
5, a ruled line designating the trimming range and a simple figure q representing the outline of the picture included therein are drawn.

Next, the line m K or figure G made on the layout mount 15
Select a line segment that will serve as a horizontal or vertical reference from among them, and calculate the points at both ends of the line segment, for example, the points T at both ends of the line segment above the ruled line, 111. and a point in figure G that has a characteristic such that a corresponding point in the pattern of document F can be easily found (this is called a specific point).

For example, select P, , P, and define these points T, ,T
,.

By pressing Pt, Pt t-curno, and 7L/16, the position data are sequentially input to the control device IO.

At this time, the points to be selected as specific points from figure q are, for example, when figure G represents a person's face, the inner corners of both eyes are selected as Pl, P,
And it is sufficient.

In this way, the data tab and let 14 are arranged on the layout mount 15.
When the position fi < j data of the above fflb notches are input, the open side j device 10 calculates these position data, and the straight line connecting the specific points p, , P of the figure G is The angle between the horizontal or vertical boundary line of the layout mount 15 is measured, and from this result, a mark M consisting of a straight line at a predetermined angle as shown in FIG. 4(a) is displayed on the monitor 13.

Next, after temporarily attaching the drum 1 KIQ bucket 1 (゛), move the drum 1 and the cylindrical surface gap reading s3 as appropriate, so that a predetermined portion of the document F, that is, the portion of the image to be trimmed, is captured by the cylindrical image reading section 3. The light incident end 3b of the cylindrical image reading section 3 is located close to Hmm with respect to the original document on the drum l, so that both of them are brought close to each other. to be fixed.

After the positioning of the cylindrical image reading unit 3 with respect to the document F on the drum 1 is completed, the control device 10
5! The reading unit 3 performs an image reading operation of the original P′,
Immediately display the read image 1 on the monitor 3. As a result, the straight line mark M and one image of the image of the document 1'' are displayed superimposed on the display surface of the monitor 3, as shown in No. 4IA(b)K. Then, the image reading operation at this time is repeated at a predetermined relatively short cycle, and each time a new image is displayed on the entire monitor 3 according to the data.

Next, while the operator is playing back the document on the monitor 3 as shown in FIG. 4(b), the operator places the original F on the surface of the drum 10. If you move it, the mark M reproduced on the display screen of monitor 3 will remain unchanged, and only the original Mr.
! ”! Becomes able to move depending on help.

Therefore, the operator asked the original F'f to help by one,
The fixed point P1.P, such as the inner corner of the eye of the image of the document F, which is facing away from the monitor surface, is exactly aligned with the straight line mark M -Lx
If you do this, the inclination angle of the document F on the drum L will be correctly aligned with the inclination angle of the feet specified on the layout table A15, and after this, the document F will be properly positioned. By attaching it to the drum 1 and reading the image data using a scanner, image data with the correct inclination angle can be obtained.

Therefore, according to this embodiment, the positioning mark and the image of the document are displayed in a superimposed manner on one monitor display surface,
Since one person can check the matching status and perform all document positioning, one person can easily match the tilt angle of the document to the tilt angle specified on the split sheet, and always maintain the correct tilt angle. Image data can be obtained.

Note that the cylindrical surface 1111i 1# is the original entrance end 3b of the reading section 3.
The distance between the document kl falling on the surface of the drum 10 is
In order to ensure that the drawing part 3 can read the drawing part 3 reliably, it is not possible to make it too thick.
Only a small distance is allowed between the two-side cylinder catcher 3 and the drum 1. Therefore, when the size of 1M 'lit''- is smaller than the cylindrical surface area f=J'it 8.b3,
Because of this small distance, it becomes difficult to adjust the inclination angle by moving ' to the document.

Therefore, in such a case, in advance, the original ``i'', 41i
t on a 3Δ bright film ↓ of an appropriate size, and move it from the periphery of the cylindrical surface i group reading capital 3 on the surface of the drum l.

As explained above, according to the present invention, the tilt angle tck can be easily and accurately adjusted by simply loading the original onto the drum surface while looking at the mark on the monitor display screen and the state of the image. In addition, it is possible to provide a document taking angle correction device for a scanner which is equipped with a moving bed that moves as follows.

■ 11 specified on the layout mount. It is possible to always accurately and easily set the original (14) on the regular repair drum at a different angle, and it can be applied to an automatic trimming layout device to eliminate deviations and inclinations in the trimming range.
Correct trimming can be done.

■ Since any tilt angle can be given accurately at all times, it can be used for sound effect light by -fW rotation, and it takes less time than rotation calculation using a commercially available computer layout system. There is no risk of deterioration of image data.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment 11 of an original angle correction device for a scanner according to the present invention, and FIG. 2(a). (I)) is an enlarged view of an embodiment of the cylindrical image reading unit, Figure 3 is an explanatory diagram showing details of the data tablet and layout mount, and Figures 4 (a) and Φ) are of the monitor reproduced image. It is an explanatory diagram. 1...ω scanning drum, 2...light source, 3...inner cylinder surface image reading section, 4...light guide section,
5... Light M, converter, 6... Data selector, 7... Song 'A/1), 8... Path driver, 9... Buffer Memo! J, 10. Song/control device, 11... Input/output controller, 12...
...Image memory, 13...Monitor, 1
4. Song data tablet. 15... Layout mount, 16... Cursor, 17... Song menu iJ[, 1'... Manuscript (
film). Agent: Patent attorney Ko Tsugube Take (and one other person) Figure 2 and σ Noah' Figure 2 (b) /Temimata~l Figure 3

Claims (1)

[Claims] Equipped with a rotating drum, an original held on the cylindrical surface of the drum is scanned to generate image data. ]? The scanner for printing plate making, which is configured to obtain a cylindrical surface image capturing means capable of simultaneously capturing a predetermined range of the curtain of a document held on the rotating drum, and displaying an image captured by the image capturing means.
``3--a monitor means, a position data input means capable of importing position data of arbitrary points on the layout mount surface, and a position data input means capable of importing position data of at least two points from the layout mount surface by the position data input means. means for displaying an image of a straight line on the monitor means based on the position data, and means for displaying an image of the straight line on the rotating drum surface based on the Ig, phase and one image of the straight line displayed on the monitor means. 1. A device for correcting a document mounting angle for a scanner, characterized in that it is configured to perform a four-correction of the holding angle of a document that is folded downward.