KR100257740B1 - Aspect ratio auto-setting apparatus and method for linear camera - Google Patents

Abstract

PURPOSE: A device and method for automatically deciding an aspect of a linear camera is provided to decide an aspect ratio of an image automatically by using a linear scale in an image processing system by using a linear camera having a fixed resolution. CONSTITUTION: An object fixing jig(102) fixes an object(101) and transmits a motion of a transferring unit(103) to the object(101). The transferring unit(103) is moved by the object fixing jig(102) and moves the object(101) in the left and right directions. A motor(104) drives the transferring unit(103). A linear scale(105) is moved by the transferring unit(103) and detects a moving direction of the object(101) and generates a pulse signal. A synchronizing signal generating unit(106) counts the pulse signal and generates a line transmission signal used to a line camera(108) per fixed pulse. A computer(107) adjusts a vertical direction resolution of the line camera(108) in accordance with the line transmission signal, and adjusts an aspect ratio of an image of the object automatically.

Description

Aspect ratio automatic determination device and method of linear camera

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear solid-state image pickup camera (hereinafter, referred to as a linear camera). In particular, a linear camera which automatically determines an aspect ratio of an image using linear scale in an image processing system using a linear camera having a fixed resolution. An aspect ratio automatic determination device and method are disclosed.

As is well known, a linear camera has a structure in which solid-state image pickup devices are arranged in a row, and has a structure in which information captured by each device is transferred to a processing circuit at a time after a short exposure time (hereinafter referred to as a line transmission structure). The horizontal resolution of is determined by the lens attached to the camera.

However, since the vertical resolution is a structure determined by the relative movement between the camera and the subject, it is not determined by the lens but is determined by the occurrence time of the line transmission signal in the line transmission structure and the distance of the subject moved between the time points.

That is, the motion of the subject is assumed to be almost constant velocity motion, and the line transmission signal is generated by an external generator or a generation circuit inside the camera at a predetermined time interval calculated.

However, the conveying body causing the relative movement between the subject and the camera is not a complete constant velocity motion due to mechanical defects such as the backlash of the gear. It was not possible to generate a line transfer signal at each time point.

Therefore, when the partial images of the subject to be variably photographed are collected, the length of the actual subject and the length of the photographed subject are different.

In order to correct this problem, a rotary encoder is mounted at the end of the motor, which is a transfer mechanism, to generate a signal whenever a transfer occurs at regular intervals.

This method has a limitation in solving the problem because it cannot directly sense the motion of a partially changed subject through a ball screw or a reducer.

The above problem will be described with reference to the schematic diagram shown in FIG.

Reference numeral 1 is a linear camera, reference numeral 2 is a side view of the subject, and reference numeral 7 is a plan view of the subject.

A, B, and C represent the feeding distances at the time of imaging the linear camera once when the relative speeds are Vr> Va, Vr = Vb, and Vr <Vc with respect to the reference speed Vr, respectively.

First, if the synchronization signal is constant and the subject's relative speed with respect to the linear camera is twice as high, the length of one shot subject is indicated by C, and the total shot length of the captured subject is reduced to 1/2 and then to 1/2. If it is lowered, the ship will increase.

In this case, when a mechanical error such as a gear is inserted into the system, the image cannot be captured at equal intervals, and thus the length of the subject photographed by the linear camera cannot be estimated.

In this case, the image information of the subject appears distorted and cannot be used for the microscopic inspection.

Therefore, since the fixed horizontal resolution does not have a constant vertical resolution, the image of the subject incident to the linear camera has a problem of not having an actual aspect ratio but a distorted aspect ratio.

Accordingly, an object of the present invention is to provide an apparatus and method for automatically determining an aspect ratio of a linear camera in which an aspect ratio of an image is automatically determined by using a linear scale in an image processing system using a linear camera having a predetermined resolution. .

Technical means of the present invention for achieving this object, the subject fixing jig to fix the subject and convey the movement of the conveying means to the subject, and the transfer means for moving the subject to the left / right in conjunction with the subject fixing jig And a linear scale configured to generate a pulse signal by detecting a moving direction of the subject linked to the transfer means, the motor driving the transfer means, and the transfer means. The vertical resolution of the linear camera is adjusted according to the synchronization signal generating means for counting the pulse signal generated in the linear scale and generating a line transmission signal used for the line camera at a predetermined pulse and the line transmission signal generated by the synchronization signal generating means. It consists of a computer that automatically adjusts the aspect ratio of the subject image.

1 is a schematic diagram of a change in the length of a subject according to a change in the state speed of the subject and the linear camera with respect to a constant synchronization signal by the technique.

2 is a configuration diagram of an aspect ratio automatic determination device for a linear camera according to the present invention.

3 is a configuration diagram relating to the generation of the line transmission signal applied in FIG.

4 is an operation flowchart for explaining FIG.

* Explanation of symbols for main parts of the drawings

101: subject 102: subject fixing jig

103: transfer unit 104: motor

105: linear scale 106: synchronization signal generator

107: computer 108: linear camera

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail as follows.

FIG. 3 shows the configuration of the automatic aspect ratio determining apparatus of the linear camera according to the present invention. The subject fixing jig 102 which fixes the subject 101 and conveys the movement of the transfer unit 103 to the subject 101 is shown in FIG. , The transfer unit 103 interlocked with the subject fixing jig 102 to move the subject 101 to the left / right, the motor 104 driving the transfer unit 103, and the transfer unit 103. A line transmission signal used for a constant pulse node line camera 108 by counting a linear scale 105 for generating a pulse signal by detecting a moving direction of the subject 101 and a pulse signal generated at the linear scale 105. To adjust the vertical resolution of the linear camera 108 in accordance with the line transmission signal generated by the sync signal generator 106 and the line signal generated by the sync signal generator 106 to automatically adjust the aspect ratio of the subject image. It has been configured as a computer 107.

In this case, the linear scale 105 is linked to the transfer part 103 and is scaled at predetermined intervals, and the linear scale 105 is linked to the object fixing jig 102 and slides on the glass rod 105a. The head 105b is configured to generate a pulse signal in accordance with the moving distance of the subject 101.

Referring to Figures 2 to 4 attached to the operation and effect of the present invention configured as described above are as follows.

First, in FIG. 2, the head 105b of the line scale 105 generates a predetermined pulse signal whenever passing through a certain point of the subject 101.

This has a higher resolution than the line camera 105 has.

On the other hand, if the horizontal resolution determined by the lens of the linear camera 108 is 'A mm / unit pixel', a few pulses from the line scale 105 are applied to make the vertical resolution the same 'A mm / unit pixel'. When it occurs, it is possible to calculate whether the subject 101 can go A mm, and with this calculated value, the synchronization signal generator 106 counts and makes a line transmission signal for the linear camera 108 every few predetermined pulses. Serve

That is, as shown in FIG. 3, the pulse signal is counted by the synchronization signal generator 106 only at the linear scale 105 to generate a line transmission signal used for the line camera 108 at a predetermined pulse.

Therefore, by determining the vertical resolution according to the fixed horizontal resolution, the aspect ratio of the linear camera 108 can be automatically adjusted.

As described above, the present invention enters the linear camera by directly measuring the relative motion between the linear camera and the subject through the linear scale according to the horizontal resolution fixed by the lens in the system using the linear camera and adjusting the vertical resolution. There is an effect of automatically adjusting the aspect ratio of the image of the subject.

Claims (3)

A subject fixing jig which fixes the subject and conveys the movement of the conveying means to the subject, a conveying means for moving the subject to the left / right in conjunction with the subject fixing jig, a motor for driving the conveying means, and A linear scale which is linked to sense a moving direction of the subject to generate a pulse signal, and a synchronous signal generating means for generating a line transmission signal for a constant pulse node line camera by counting a pulse signal generated from the linear scale; And a computer for automatically adjusting the aspect ratio of the subject image by adjusting the vertical resolution of the linear camera according to the line transmission signal generated by the synchronization signal generating means. The glass rod according to claim 1, wherein the linear scale is linked to the transfer means and is graduated at predetermined intervals. And a head configured to generate a pulse signal according to a distance moved by the subject while sliding on the glass rod in conjunction with the subject fixing jig. The first step of detecting a fixed position of the linear camera and the subject in which the relative motion occurs when the resolution in the array direction is determined, and generating a line transmission signal according to the first step, and adjusting the vertical resolution of the synchronization signal linear camera in accordance with the line signal. A method for automatically determining an aspect ratio of a linear camera, characterized by comprising a second step of automatically adjusting an aspect ratio of an image.

Images