JP2972802B2 - Image information processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention provides an image information from many imaging device number of pixels, relates preferred image processing apparatus in the case that displays on display portion with few number of pixels, further
Specifically, the image signal for one line from the line sensor is
By thinning out, the number of pixels for one line is
Output to a display unit with fewer pixels than
The present invention relates to an image information processing apparatus to be shown.

[0002]

2. Description of the Related Art Generally, in a case where image information from an image pickup device having a large number of pixels, for example, a CCD line sensor is displayed on a display portion having a small number of pixels, for example, a liquid crystal display, FIG. Image information is thinned out and displayed.

That is, FIG. 4A shows that the number of pixels is 204
8 shows an image signal from the CCD line sensor 8;
FIG. 4 (B) shows that one line is reduced to 1/16 and 128
4 shows an image signal displayed on a liquid crystal display of a pixel.

[0004]

By the way, an inspection line for imaging a product by the CCD line sensor or the like and monitoring it on a liquid crystal display or the like to inspect the product for defects, for example, a hole in an opaque film or the like. In the case of inspecting the defect of FIG.
As shown by the arrow 9 in FIG. 9A, the level is higher than the level of the image signal in the normal part.

Conventionally, as described above, an image signal from a CCD line sensor is regularly thinned out and displayed on a liquid crystal display, regardless of the level of the signal, as shown in FIG. As described above, in some cases, a change in a pixel signal of several pixels corresponding to a defective portion cannot be displayed due to thinning out, and there is a problem that accurate determination of the presence or absence of a defect cannot be made.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and is intended to display image information from an imaging device having a large number of pixels on a display unit having a small number of pixels. It is an object of the present invention to be able to reliably display.

[0007]

In order to achieve the above-mentioned object, the present invention is configured as follows.

That is, the first aspect of the present invention provides a line cell
La an image signal corresponding to the number of pixels for one line from the capacitors
Display unit with fewer pixels for one line than in-sensor
When outputting, a predetermined image is obtained from the image signal from the line sensor.
Image information processing apparatus that performs thinning processing for each prime image signal
Extracting the image signal having the maximum or minimum signal level from the image signal having the predetermined number of pixels,
It performs a pulling process.

According to a second aspect of the present invention, a signal from a line sensor is provided.
An image signal corresponding to the number of pixels for one line is sent to a line sensor
Output to a display unit with fewer pixels per line than
At this time, an image of a predetermined number of pixels from the image signal from the line sensor
In an image information processing apparatus that performs a thinning process for each signal,
Write the image signal from the line sensor to the image memory,
The maximum value mode is obtained from the image signal of a predetermined number of pixels from the image memory.
In the mode, the image signal with the highest signal level and the minimum value
In the video mode, the image signal with the lowest signal level is extracted.
Out and write to another area of this image memory
The signal level written from the memory to the area is the highest.
Read the large or minimum image signal corresponding to each mode.
And outputs it to the display unit.

According to a third aspect of the present invention, there is provided the image according to the second aspect.
In an image information processing apparatus, an image signal from a line sensor
Is written in the image memory, and a predetermined pixel is written from the image memory.
In the average mode, the number of image signals is written to the image memory.
From the image signal from the line sensor
Calculate the average value of the signal level for each prime image signal
Write to another area of the image memory,
Read out the average image signal and output it to the display unit.
is there.

According to the first aspect of the present invention, the predetermined image
The decimation process for each prime image signal is performed for an image signal of a predetermined number of pixels.
Signal with the highest or lowest signal level from the signal
By one line, one line more than the line sensor
Can be displayed on a display unit with a small number of pixels.
At the time of display, a portion where the level of the image signal changes is surely displayed.

According to the second aspect of the present invention, the line
The signal from the image memory where the image signal from the sensor is written
Extract the image signal with the highest or lowest signal level, respectively.
And write it to another area of the image memory,
Read the maximum or minimum image signal from the
The output is output to the
Display on the display with fewer pixels for one line than the sensor
And at the time of display, the level of the image signal
The changed part will be displayed reliably.

According to the third aspect of the present invention, the average value
In the mode, the average value for each image signal of a predetermined number of pixels can be grasped.
Will be able to.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of one embodiment of the present invention. In this embodiment, description will be made by applying the present invention to a line for inspecting the presence or absence of a hole in an opaque film.

In FIG. 1, 1 is a light source, 2 is an opaque film, 3 is a camera having a built-in CCD line sensor having 2048 pixels, 4 is an image capturing circuit, 5 is an A / D conversion circuit, 6 is an A / D converter. An image memory from which image data from the conversion circuit 5 or image data processed by the CPU 7 is written and read. Reference numeral 7 denotes a CPU which controls each unit and processes the image data as described later. One line is a liquid crystal display having 128 pixels. Note that the image memory 6 and the CPU 7
As described later, it has a function as an extracting means for extracting an image signal having the maximum or minimum signal level.

The image information processing apparatus according to this embodiment converts the image signal from the CCD line sensor having 2048 pixels to the liquid crystal display 8 in which one line having a small number of pixels is 128 pixels. Is output by thinning it to 1/16. In this case, in order to prevent the image signal corresponding to the hole of the opaque film 2 from being thinned out, it becomes impossible to perform an accurate inspection. doing.

That is, by designating the maximum value mode from an input means (not shown), the CPU 7 performs a predetermined number of pixels from the image signal which has been A / D converted and written in the image memory 6. Therefore, for each pixel signal corresponding to 16 pixels, an image signal having the maximum signal level is extracted and written to another area of the image memory 6, and the extracted image signal is read and read out from the liquid crystal display 8.
Is displayed.

Therefore, when the image signal is thinned to 1/16, the image signal having a high signal level corresponding to the hole of the opaque film 2 is reliably extracted and displayed on the liquid crystal display 8. Unlike the conventional example in which signals are thinned out regardless of the level of the signal level, the image signals corresponding to the holes in the opaque film are not thinned out.

Further, in this embodiment, by specifying the minimum value mode from input means (not shown),
The PU 7 extracts an image signal having the minimum signal level from the image signal that has been A / D converted and written in the image memory 6 for each pixel signal corresponding to 16 pixels, and writes the extracted image signal in another area of the image memory 6. The extracted image signal can be read out and displayed on the liquid crystal display 8. This minimum value mode is used, for example, when inspecting the presence or absence of black spots (dirt) on the transparent film.

In this embodiment, the average mode is designated by input means (not shown),
U7 calculates the average value of the signal level of each pixel signal corresponding to 16 pixels from the image signal that has been A / D converted and written in the image memory 6, writes the average value in another area of the image memory 6, and The written average image signal can be read out and displayed on the liquid crystal display 8.

FIG. 2 is a waveform diagram of an image signal for explaining the operation of this embodiment, and FIG.
FIG. 4B shows an image signal displayed on the liquid crystal display 8 in the maximum value mode.
FIG. 3C shows image signals of the superimposed display in the maximum value mode and the average value mode, respectively.

As shown in FIG. 2, a portion where the image signal changes is reliably displayed, and a defective portion such as a hole in the film can be reliably detected.

FIG. 3 is an image signal waveform diagram when this embodiment is applied to the inspection for the presence or absence of a black spot on a transparent film. FIG. 3A shows an image signal from a CCD line sensor. FIG. 2B shows image signals displayed on the liquid crystal display 8 in the minimum value mode.

As shown in FIG. 3, a portion where the image signal changes is reliably displayed, and a defective portion such as a black point of the film can be reliably detected.

In the above-described embodiment, the transmission type inspection line has been described. However, it is needless to say that the present invention can be similarly applied to a reflection type inspection line.

[0027]

As described above, according to the present invention, a predetermined pixel
The decimation process for each image signal of a predetermined number of image signals
Extract the image signal with the maximum or minimum signal level from
Because in particular do than, for one line than the line sensor
The display can be displayed on a display unit with a small number of pixels.
At this time, a portion where the level of the image signal changes is surely displayed.

Further , according to the present invention, in the average value mode,
Can also determine the average value for each image signal of a predetermined number of pixels.
it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a signal waveform diagram for explaining the operation of the embodiment of FIG. 1;

FIG. 3 is a signal waveform diagram for describing the operation of the embodiment of FIG. 1;

FIG. 4 is a signal waveform diagram showing a problem of the conventional example.

[Explanation of symbols]

 2 Film 3 Camera 6 Image memory 7 CPU 8 Liquid crystal display

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06T 7/00 G06T 3/40 G06T 1/00 G01N 21/88

Claims (3)

(57) [Claims] 1. The number of pixels for one line from a line sensor
The corresponding image signal is output for one line from the line sensor.
When outputting to the display unit with few prime numbers,
From the image signal of the specified number of pixels
In the image information processing apparatus , the thinning process is performed by extracting an image signal having a maximum or minimum signal level from the image signal having the predetermined number of pixels.
Performed, the image processing apparatus characterized by. 2. The number of pixels for one line from a line sensor
The corresponding image signal is output for one line from the line sensor.
When outputting to the display unit with few prime numbers,
From the image signal of the specified number of pixels
In the image information processing apparatus to be performed, the image signal from the line sensor is written into the image memory,
The maximum value mode is obtained from the image signal of a predetermined number of pixels from the image memory.
In the mode, the image signal with the highest signal level and the minimum value
In the video mode, the image signal with the lowest signal level is extracted.
Out and write to another area of this image memory
The signal level written from the memory to the area is the highest.
Read the large or minimum image signal corresponding to each mode.
Output to the display unit.
Image information processing device. 3. The image information processing apparatus according to claim 2, wherein
Te, writes the image signal from the line sensor in the image memory,
An average value mode is calculated from the image signal of a predetermined number of pixels from the image memory.
In the mode, the line sensor written in the image memory is used.
From the image signal from the
Calculate the average value of the signal level and write it to another area of the image memory.
Read out the written average image signal
Outputting image data to the display unit.
apparatus.