JPS6363056B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is used in the inspection process during thermometer production, etc., and inputs image data showing a thermometer, and determines whether or not a mercury column is visible from the image. The present invention relates to a mercury column detection device.

[Technical background of the invention]

Conventionally, when inspecting a thermometer by inputting a body temperature plan image, analyzing the image with a computer, etc., and checking the positional relationship between the scale lines inside the thermometer and the mercury column, the mercury column on the thermometer can only be seen from a specific angle, so the mercury column is first checked. I had to analyze and judge whether it was visible or not. This analysis also took a considerable amount of time, and the processing speed was slow for a device that operates in real time.

[Purpose of the invention]

An object of the present invention is to provide a mercury column detection device that can input a body temperature plan image and determine whether or not a mercury column is visible in the image at high speed and accurately. be.

[Summary of the invention]

The present invention focuses on the fact that the image pattern of a mercury column is band-like, and includes a memory that stores image data in a predetermined direction by receiving each address designation, and an adder in which image data within a set area is input line by line. Then, the image data storage value of the address in the planned direction stored in the memory is read and added, and this is stored again in the memory as cumulative addition result data, and the cumulative addition result data stored in this memory is set in advance. The feature is that the mercury column is compared with the threshold level to determine whether or not the mercury column is visible.

[Embodiments of the invention]

The configuration of one embodiment of the present invention is shown in FIG.

In FIG. 1, the CPU is a processor that controls various parts described later through the data bus BUS.
ADD is an address generator that generates address data. In addition, 2 is a random access memory (RAM) that stores one line of image data in the scheduled direction after receiving each address specified by the address data generated from the address generation unit ADD.
The memory 2 has a capacity to store data of 512 pixels for one line, for example. Reference numeral 1 denotes an adder into which the body temperature planning image data within the setting area is input for each line.When the image data is inputted for each line, this adder 1 inputs the image data storage value of the address in the planned direction from the memory 2. is read out, added, and stored again in the corresponding address of the memory 2 as cumulative addition result data.
3 is a determiner that compares the cumulative addition result data read out from memory 2 with a preset threshold level when all addition operations are completed in adder 1, and determines whether or not the mercury column is visible. be.

Next, the operation of the mercury column detection device according to the present invention configured as described above will be explained.

Now, it is assumed that image data as shown in FIG. 2 is sequentially input line by line to the mercury column detector as multivalued digital data. In FIG. 2, A is a scale plate, B is a scale line, C is a mercury column, D is an area previously set on the visual field, and the background E of the body temperature planning image is, for example, black.

When the image data in the set area D is input, the adder 1 adds 1 under the control of the processor CPU.
Its X address (horizontal address) for each line
The stored values are read out from the memory 2, added, and stored in the memory 2 again. Therefore, the memory 2 stores the result of cumulative addition of image data in the Y direction (vertical direction).

When all additions within the set area D are completed, information as shown in FIG. 3 is obtained. In Figure 3, the horizontal axis is the X-direction position on the field of view, the vertical axis is the image data addition result, F is the part corresponding to background E in Figure 2,
G is a portion corresponding to the scale plate A, and H is a portion corresponding to the mercury column C. The influence of scale line B also appears in part G. FIG. 3 shows a case where the mercury column is visible as in FIG. 2, but when the mercury column is not visible, the depressed portion H disappears.
However, in the case of a horizontal line, if the line overlaps the scale line, the change in shading in this part is small, resulting in data as shown by the broken line in Figure 3, making it impossible to make accurate judgments. However, with the present invention, Since the image data inputted line by line by the adder 1 is added to the stored value of the address of the scheduled direction read from the memory 2 to create cumulative addition data, it is not affected by the scale lines and character lines. Accurate judgment can be made.

By comparing this addition result data with an appropriate threshold level R, it can be determined whether or not there is a drop in the portion H corresponding to the mercury column C mentioned above.
If there is a drop H, it is determined that the mercury column is visible.

It should be noted that instead of simply detecting the presence or absence of a dip H, the width of the dip H may be detected and whether or not the mercury column is present may be determined based on whether or not the value rises to a set value. There is also no risk of false detection due to noise or the like.

Furthermore, the present invention is not limited to the embodiments described above and shown in the drawings; for example, when adding up image data within a previously set area, it is possible to add up each horizontal line, that is, to calculate the cumulative total in the horizontal direction. Various modifications are possible, such as taking summed data (in this case placing the thermometer along the horizontal axis).

It is also naturally possible to replace the adder 1 and the determiner 2 with a microcomputer or the like.

〔Effect of the invention〕

According to the present invention, when determining whether or not a mercury column is visible in an image, there is no need for a computer to perform complex analysis of image data, and the mercury column can be quickly and accurately determined with a simple hardware configuration. A sensing device can be provided. Further, by using this device in combination with an image processing device that inputs and analyzes the same body temperature plan image data, real-time thermometer inspection with extremely high processing speed becomes possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an example of input body temperature planning image data in the embodiment, and FIG. 3 is a diagram showing cumulative addition data of image data in the embodiment. It is a figure showing an example. 1...adder, 2...memory, 3...determiner.

Claims (1)

[Claims] 1 Enter the image data showing the thermometer,
In the mercury column detection device that determines whether or not the mercury column is visible from the image, there is a memory that stores image data in a scheduled direction after receiving each address designation, and image data in a set area is input line by line. and an adder that reads out the image data storage value at the address in the scheduled direction from the memory, adds it, and stores it again in the memory as cumulative addition result data; and an adder that reads the cumulative addition result data from the memory and adds it. What is claimed is: 1. A mercury column detection device comprising: a determination device that compares the mercury column with a preset threshold level and determines whether or not a mercury column is visible.