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Method for testing resolution ratio of camera head

A camera resolution and camera technology, which is applied in the direction of testing optical performance, etc., can solve the problems of low manual measurement efficiency, large subjective factors, and insufficient objective and accurate measurement results, and achieve the effect of improving accuracy and testing efficiency

Inactive Publication Date: 2005-12-14
SHANGHAI DBTEL IND
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Problems solved by technology

However, due to the manual operation of this method, the tester needs to rely on his own or other people's experience to make judgments, so the subjectivity factor is relatively large, the measurement results are not objective and accurate, and the manual measurement efficiency is relatively low. If the number of cameras required for measurement is relatively large more, it will be more troublesome

Method used

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  • Method for testing resolution ratio of camera head
  • Method for testing resolution ratio of camera head
  • Method for testing resolution ratio of camera head

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Embodiment Construction

[0019] A method for testing camera resolution of the present invention pre-sets a standard picture in the computer, and any position of the standard picture such as the center or four corners can be set to different areas such as the center or four corners as required. figure 1 As shown, in order to test the resolution at different positions corresponding to the camera, other areas of the standard picture are set to standard white. The brightness value of standard white in the present invention is 255, and the brightness value of standard black is 0. It can be seen that the brightness value of standard black is 0. The set specific area alternates from right to left standard white stripes and standard black stripes, and the standard white stripes are always the same width as the right adjacent standard black stripes (the standard black stripes on the right of the rightmost standard white stripe are not shown in the figure come out), and the width of the standard white stripes an...

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Abstract

The method of testing the resolution of CCD camera includes the following steps: 1. reading out taken picture in the computer and selecting one specific area; 2. taking one straight line in the center of the specific area and reading out the brightness values of pixels along the line; 3. judging whether the current pixel has brightness exceeding the default white brightness; 4. if yes, analyzing the pixel number the default white stripe expresses according to default white stripe of the current pixel and referring to the corresponding area in the standard picture; 5. obtaining the line resolution number corresponding to the default white stripe; and 6. analyzing the line resolution corresponding to the residual default white stripes and selecting the maximum resolution line number from the whole obtained data.

Description

【Technical field】 [0001] The invention relates to a method for testing the resolution of a camera, in particular to a method for testing the resolution of a camera in electronic products such as a digital camera or a mobile phone capable of taking pictures. 【Background technique】 [0002] In the current consumer electronics market, electronic products with cameras that can take pictures or videos, such as digital cameras and mobile phones that can take pictures, are becoming more and more popular. When evaluating the cameras of these products, a very important technology The index is the resolution of the camera. The resolution of the camera is generally represented by the maximum number of lines that can be distinguished in the captured picture. Since the resolution of the camera determines the clarity of the subject after it is imaged through the lens to a certain extent, so for For manufacturers, when selecting a camera, in addition to referring to the technical parameter...

Claims

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Application Information

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IPC IPC(8): G01M11/02
Inventor 莫皓然于洪鑫高俊
Owner SHANGHAI DBTEL IND
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