JPH06213828A - Inspecting apparatus of vessel of complicated shape - Google Patents

Abstract

PURPOSE:To furnish an inspecting apparatus of a vessel of a complicated shape which can set a window of a complicated shape easily and enables change of the shape of the window in accordance with the angle of an image. CONSTITUTION:A video signal constituting an image plane to be inspected is compared with a threshold by an analog comparator and binary serial image signals being 'L' for a normal part and 'H' for an abnormal part are prepared. The binary serial image signals are inputted to an AND circuit 14. On the other hand, mask patterns constituted of binary mask data are prepared in a mask memory 12 so that they correspond to the angles of an image, and they are selected by a selector controller 31 in accordance with the angle of the image of the image plane to be inspected. The binary mask data of the selected mask pattern are read synchronously with the binary serial image signal by a sync circuit 32 and inputted to the AND circuit 14. As the result, only the binary serial image signal of a part not being masked passes through the AND circuit 14 and is outputted as an abnormality detection signal. Accordingly, even a vessel of a complicated shape can be inspected suitably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inspecting a complex-shaped container, and more particularly to a complex-shaped container for inspecting a plastic container with a handle, a glass bottle with a handle, or the like for the presence of scratches or foreign substances. The present invention relates to a container inspection device.

[0002]

2. Description of the Related Art In a conventional bottle inspection apparatus, as shown in FIG. 5, only the main part of the bottle P is displayed in a window W on screens GA, GB, GC, GD in which the bottle P is imaged from different image angles. Then, it is inspected for the presence of scratches K or foreign matter I in the window W. This is for masking the background B and the contour L of the bottle P to reduce the amount of data to be processed and prevent erroneous determination.

As shown in FIG. 6, the window W counts the number of horizontal scanning lines H (actually the number of horizontal synchronizing signals) forming the screen G to define the upper and lower edges of the window W, The left and right edges of the window W are defined by counting the horizontal scanning amount (actually, the number of internal clocks) from the horizontal synchronizing signal. Therefore, the window W has a rectangular shape. There is also a conventional example that uses a circular window.

[0004]

In the case of a container having a complicated shape such as a plastic bottle with a handle or a glass bottle with a handle, the contour of the container or the handle is complicated and the appearance may change depending on the image angle. However, in the conventional bottle inspection device described above, since the window W has a simple quadrangle (or a circle) and is constant regardless of the image angle, there is a problem that it cannot be applied to a container having a complicated shape.
Therefore, an object of the present invention is to provide an inspecting apparatus for a complex-shaped container in which a window having a complicated shape can be easily set and the window shape can be changed according to the image angle.

[0005]

In the inspection device for a complex shape container according to the present invention, an image input means for inputting images of the complex shape container at a plurality of different image angles, and an image memory directly or from the image input means. And an abnormality determining means for outputting a binary serial image signal binarized by comparing a serial image signal obtained indirectly via a predetermined threshold with "L" for a normal part and "H" for an abnormal part. , A mask memory for storing a plurality of mask patterns corresponding to image angles consisting of binary mask data in which the mask portion is "L" and the window portion is "H", and a mask corresponding to the image angle of the binary serial image Binary mask data synchronous output means for reading out binary mask data from the pattern and outputting in synchronization with the binary serial image signal, and output signals of the abnormality determining means. It is an aspect of the construction by comprising an AND circuit for calculating a logical product of the outputs of the fine the binary mask data synchronization output unit.

[0006]

In the inspecting apparatus for a complex shape container of the present invention,
The image input means inputs images of a complex-shaped container (for example, a plastic bottle with a handle or a glass bottle) at a plurality of different image angles. Then, the abnormality determination means compares the serial image signal obtained from the image input means with a predetermined threshold value. Then, the normal part is set to "L" and the abnormal part is set to "H", and the binarized binary image signal is output. Next, the binary mask data synchronous output means outputs from the mask memory, which stores a plurality of mask patterns corresponding to image angles, which is composed of binary mask data in which the mask portion is "L" and the window portion is "H". The binary mask data of the mask pattern corresponding to the image angle of the binary serial image is read and output in synchronization with the binary serial image signal. Then, the AND circuit calculates a logical product of the binary serial image signal and the binary mask data. As a result, only the binary serial image signal of the unmasked portion passes through the AND circuit and is output as the abnormality detection signal.

Since the mask pattern is binary mask data, it can be formed in a complicated shape and can be prepared corresponding to the image angle. Therefore, even a complex-shaped container can be suitably inspected.

[0008]

The present invention will be further described below with reference to the embodiments shown in the drawings. The present invention is not limited to this. FIG. 1 is a configuration diagram of a plastic bottle inspection device 100 according to an embodiment of the present invention. This inspection apparatus 100 for a plastic bottle with a handle includes a rotary table 1 on which a plastic bottle P with a handle is placed, a motor 2 for rotating the rotary table 1, a rotary encoder 3 for measuring the rotation amount of the rotary table 1, Emitter 4 and receiver 5
, Surface light source 6, video camera 7, and signal processing device 10
It consists of and.

The light projector 4 and the light receiver 5 are installed so that a light beam is blocked at an angle where a handle P'of a plastic bottle P with a handle faces the video camera 7.

FIG. 2 is a block diagram of the signal processing apparatus 10. The signal processing device 10 includes an abnormality determination unit 11
, A mask memory 12, a binary mask data synchronization output unit 13, and an AND circuit 14.

The abnormality determining section 11 includes a differentiating circuit 21 for emphasizing a waveform of a video signal from the video camera 7 due to scratches or foreign matters, and an integrating circuit 2 for removing unnecessary noise.
2, an analog comparator 23 for analog-comparing the video signal preprocessed by the differentiating circuit 21 and the integrating circuit 22 with a threshold value, and a threshold value selector 24 for selecting either the ground potential or the threshold values #A to #D. And threshold #A to threshold #
And a threshold circuit 25 for generating D.

The mask memory 12 has a mask pattern #A.
~ Mask pattern #D is stored. The mask patterns #A to #D are bitmaps corresponding to the screen formed by the video signal, and the bits of the mask portion are “L” and the bits of the window portion are “H”.

The binary mask data synchronization output unit 13 has a selector controller 31, a synchronizing circuit 32, and a mask selector 33. The selector controller 3
1 is a ground potential or one of threshold values #A to #D, and an “L” level or a mask, based on the angle signal from the rotary encoder 3, the home signal from the photodetector 5 and the video signal. A select signal for selecting any of pattern #A to mask pattern #D is generated. The synchronization circuit 32 generates a synchronization signal for reading the mask patterns #A to #D from the mask memory 12 in synchronization with the video signal. The mask selector 33, based on the select signal,
Any one of mask pattern #A to mask pattern #D is selected.

The AND circuit 14 calculates the logical product of the binary serial image signal output from the abnormality determining section 11 and the binary mask data output from the binary mask data synchronization output section 13, and outputs the logical product. The calculation result is output as a detection signal.

Next, the operation will be described. In the initial state, in the selector controller 31, the threshold selector 24 selects the ground potential and the mask selector 33 selects the “L” level. At this time, the detection output of the AND circuit 14 is kept at "L".

Plastic bottle P with handle to be inspected
However, when the rotary table 1 is mounted on the rotary table 1 and the rotary table 1 is rotated by the motor 2, the handle P ′ of the bottle with handle P is at an angle facing the video camera 7. At this time, the light beam from the light projector 4 is blocked by the handle P ′, so that the light receiver 5 outputs a home signal to the selector controller 31. When the home signal is input, the selector controller 31 selects the threshold value #A with the threshold value selector 24, and selects the mask pattern #A with the mask memory 12 and the mask selector 33.

The video camera 7 inputs to the differentiating circuit 21 a video signal forming a screen GA in which the handle P'shows the front as shown in FIG. The differentiating circuit 21 emphasizes the waveform due to foreign matters and then integrates the video signal into the integrating circuit 22.
To enter. The integration circuit 22 removes unnecessary noise and then inputs the video signal to the analog comparator 23.

The analog comparator 23 compares the preprocessed video signal with the threshold value #A and outputs a binary serial image signal. In the normal portion, since the video signal is smaller than the threshold value #A, the binary serial image signal becomes "L". In the abnormal portion (for example, the portion of the scratch K), the video signal is larger than the threshold value #A, so the binary serial image signal becomes “H”. However, this is the background B, the contour L of the bottle P, and the handle P ′.
Not guaranteed with the contours of.

On the other hand, the synchronizing circuit 32 extracts a vertical synchronizing signal and a horizontal synchronizing signal from the video signal and gives a synchronizing signal for reading the binary mask data in synchronization with the video signal to the mask memory 12. Therefore, the AND circuit 14
Calculates the logical product of the binary serial image signal and the binary mask data of mask pattern #A. The mask pattern #A has a shape as shown in FIG. 3A, and since the binary mask data of the mask portion is “L”, the background B, the contour L of the bottle P with handle and the handle P ′ are In the outline part,
The detection output of the AND circuit 14 becomes "L" regardless of the binary serial image signal. That is, it is masked. On the other hand, since the binary mask data in the window WA is “H”, the detection output of the AND circuit 14 is dependent on the binary serial image signal in the essential part of the bottle P with a handle, and the binary serial image signal is If it is "L", it becomes "L", and if the binary serial image signal is "H", it becomes "H". That is, if the flaw K exists, the detection signal becomes "H" at that time.

When the inspection of the screen GA shown in FIG. 3A is completed, the selector controller 31 selects the ground potential with the threshold selector 24 and "L" with the mask selector 33.
Select a level. As a result, the detection output of the AND circuit 14 is returned to "L".

Next, the selector controller 31 refers to the angle signal and detects that the rotary base 1 has rotated 90 ° since the home signal was input. Then, the threshold value selector 24 selects the threshold value #B, and the mask memory 12 and the mask selector 33 select the mask pattern #B.
The video camera 7 has a handle P ′ as shown in FIG.
A video signal forming a screen GB having a right angle of 90 ° is input to the differentiating circuit 21. The differentiating circuit 21 inputs the video signal to the integrating circuit 22 after emphasizing the waveform due to foreign matter or the like. The integration circuit 22 removes unnecessary noise and then inputs the video signal to the analog comparator 23.

The analog comparator 23 compares the preprocessed video signal with the threshold value #B and outputs a binary serial image signal. In the normal portion, since the video signal is smaller than the threshold value #B, the binary serial image signal becomes “L”. In the abnormal part, the video signal is larger than the threshold value #B, so that the binary serial image signal becomes “H”.

The synchronizing circuit 32 extracts a vertical synchronizing signal and a horizontal synchronizing signal from the video signal, and gives a synchronizing signal for reading the binary mask data in synchronization with the video signal to the mask memory 12. The AND circuit 14 calculates the logical product of the binary serial image signal and the binary mask data of the mask pattern #B. The mask pattern #B has a shape as shown in FIG. 3B, and in the background B, the contour L of the bottle P with a handle and the contour of the handle P ′, regardless of the binary serial image signal. The detection output of the AND circuit 14 becomes "L". On the other hand, in the main part of the bottle P with a handle in the window WB, the detection output of the AND circuit 14 depends on the binary serial image signal, and the binary serial image signal is “L”.
If it is, it becomes "L", and if the binary serial image signal is "H", it becomes "H".

When the inspection of the screen GB shown in FIG. 3B is completed, the selector controller 31 selects the ground potential with the threshold selector 24 and the mask selector 33 with "L".
Select a level. As a result, the detection output of the AND circuit 14 is returned to "L".

Similarly, a screen GC in which the handle P ′ shown in FIG. 3 (c) faces rearward, and a screen GD in which the handle P ′ shown in FIG. 3 (d) faces 90 ° leftward. But the inspection is done.

According to the inspection apparatus 100 for a plastic bottle with a handle described above, since the threshold value and the mask pattern are changed according to the image angle, even a container having a complicated shape can be suitably inspected in real time.

As another embodiment, there is one in which the positional deviation correcting section 40 shown in FIG. 4 is added. In the positional deviation correction unit 40, the screens GA to GD are stored in the image memory 41 by using the synchronous writing circuit 42. In addition, each screen GA ~
The GD is binarized by the binarization circuit 43, and the binarized screen G
A ′ to GD ′ are stored in the binarized image memory 44. Further, the misalignment calculation circuit 45 uses the binarized screens GA ′ to G ′.
The positional shift between D ′ and the mask pattern is calculated by edge extraction, centroid measurement, or the like. Then, when each of the screens GA to GD is read from the image memory 41 by the internal read signal,
The position of the mask pattern read from the mask memory 12 is corrected by the position shift correction signal, and the positions are matched. The read video signal in FIG. 4 is replaced with the video signal in FIG.

[0028]

According to the inspecting apparatus for a complex shape container of the present invention, since the mask pattern of the binary mask data is used, it is possible to prepare a complicated shape and prepare it for the image angle. Therefore, even a complex-shaped container can be suitably inspected.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of a plastic bottle inspection device with a handle according to an embodiment of the present invention.

FIG. 2 is a block diagram of a signal processing device in the inspection device for a plastic bottle with a handle in FIG.

FIG. 3 is an explanatory diagram of a screen and a mask pattern having different image angles.

FIG. 4 is a block diagram of a positional deviation correction unit 40 according to another embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional bottle inspection.

FIG. 6 is an explanatory diagram of a conventional mask pattern.

[Explanation of symbols]

 100 Plastic bottle inspection device with handle 1 Rotation table 2 Motor 3 Rotary encoder 4 Emitter 5 Light receiver 6 Surface light source 7 Video camera 10 Signal processing device 11 Abnormality determination unit 12 Mask memory 13 Binary mask data synchronization output unit 14 AND circuit P Plastic bottle with handle P'Handle P '

Claims (3)

[Claims] 1. An image input unit for inputting images of a complex-shaped container at a plurality of different image angles, and a serial image signal obtained directly from the image input unit or indirectly via an image memory as a predetermined threshold value. By comparing, the normal portion is set to "L", the abnormal portion is set to "H", and an abnormality determining means for outputting a binary serial image signal binarized, the mask portion is set to "L", and the window portion is set to "H". And a mask memory for storing a plurality of mask patterns corresponding to the image angles, which are composed of binary mask data, and binary mask data are read from the mask patterns corresponding to the image angles of the binary serial images to obtain the binary serial image signals. And a binary mask data synchronous output means for outputting in synchronization with the output signal of the abnormality judging means and an output of the binary mask data synchronous output means. An inspecting device for a complex-shaped container, comprising an AND circuit for calculating. 2. The inspecting apparatus for a complex shape container according to claim 1, further comprising a threshold value output means for outputting a plurality of threshold values corresponding to image angles. 3. The complex shape container inspection apparatus according to claim 1 or 2, wherein the mask memory image input means for storing the mask pattern is a video camera, and the serial image signal is a video signal, in real time. A device for inspecting a complex-shaped container, which inspects a complex-shaped container.