JPH0723875B2 - Image display method in glass bottle inspection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method of displaying an image on a monitor screen in a glass bottle inspection apparatus.

[0002]

2. Description of the Related Art A glass bottle to be inspected is photographed with a camera, the image is taken into a microcomputer, and the change in brightness of the defective portion of the glass bottle is binarized depending on whether or not it exceeds a set value, and then a monitor screen is displayed. The display on the is conventionally performed on the glass bottle inspection line. Further, it has been conventionally practiced to divide an inspection target range into a window in an image of a glass bottle.

On the monitor screen of the conventional glass bottle inspecting apparatus, however, an image 1 of the glass bottle and a window 2 set thereon can be seen as shown in FIG. 4 in the state of the normal screen or the multi-valued screen. However, when the screen is switched to the binarized screen, the entire screen is binarized as shown in FIG. 5, and only the defect image 3 is clearly displayed, but the peripheral image is erased. . For this reason, it is extremely difficult to set the inspection target range on the binarized screen.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and makes it easy to see the position of a window with respect to the entire screen even on a binarized screen, thereby facilitating the setting of an inspection range. The present invention has been completed in order to provide an image display method in the glass bottle inspection device.

[0005]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above problems, is a window for setting an inspection target range by multi-value and binarization of an image of a glass bottle captured by a camera. Is displayed on the screen as a binarized image inside, and as a multi-valued image outside the window.

[0006]

The present invention will be described in more detail below with reference to FIGS. In FIG. 1, reference numeral 4 denotes a camera, which photographs a glass bottle to be inspected as an image 1 including a defect image 3 as shown in FIG. Needless to say, the defect image 3 is not included when the glass bottle has no optically detectable defect.

An A / D converter 5 converts the output of the camera 4 into a digital signal. At this stage, the signal is a multi-valued digital signal including the background, the shape of the glass bottle, etc. (for example, multi-valued in 16 steps), and is binarized by the binarization circuit 6. Thereby, only the defect image 3 can be taken out. Reference numeral 7 is an arithmetic circuit, 8 is a data memory, and 9 is a CPU. The multi-valued digital signal is stored in the multi-valued memory 10, and the binarized signal is stored in the binarized memory 11. Then, these signals are input to the first selector 12 and the second selector 13.

Besides, the first selector 12 and the second selector 13
A window signal generated by the window generator 14 is input to the window memory 15 via the window memory 15. Further, the address generator 16 sends address information to each memory to determine the relative position of the window and the image on the screen.

The first selector 12 has a function of selecting the binarized memory 11 in the area where the window is set and selecting the multi-valued memory 10 in the area where the window is not set. The second selector 13 is CP
It has a function of selecting one of a normal signal, a multi-valued signal, an output signal of the first selector 12, a binarized signal, and a window signal according to a command from U9. Reference numeral 17 is a monitor that mixes the signals selected by the second selector 13
Is a mixer for displaying on the screen, 19 is a character generator, 20 is a character memory, and 21 is a sync generator.

[0010]

According to the present invention, by passing the output of the camera 4 through the image processing circuit configured as described above, only the defect signal 3 is emphasized inside the window 2 as shown in FIG.
A binarized image can be displayed on the screen outside the window 2 as a multi-valued image including a background. It goes without saying that a normal image, a multi-valued image, a binarized image, etc. can be displayed on the screen of the monitor 18 by switching the second selector 13.

[0011]

As described above, according to the image display method of the present invention, only the inside of the window can be a binarized image and the outside of the window can be displayed on the monitor screen as a multi-valued image. The position of the window with respect to the entire screen is easy to see, which makes it possible to easily set the inspection target range and the camera mounting position. Therefore, the present invention, as an image display method in a glass bottle inspecting apparatus that solves the conventional problems, has a great contribution to the industrial development.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of an image processing circuit used in the present invention.

FIG. 2 is a front view showing a multivalued image of a glass bottle.

FIG. 3 is a front view showing an image displayed according to the present invention.

FIG. 4 is a front view showing a multi-valued image in which a conventional window is set.

FIG. 5 is a front view showing a conventional binarized image.

[Explanation of symbols]

 1 Image of glass bottle 2 Window 3 Defect image

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G09G 5/00 Z 9471-5G 520 A 9471-5G H04N 7/18 B

Claims (1)

[Claims] 1. An image in which a glass bottle is captured by a camera is multi-valued and binarized, and a binarized image is set inside a window for setting an inspection target range, and a multi-valued image is set outside the window. An image display method in a glass bottle inspecting device, characterized by displaying on a screen.