TVLine detection method and TVLine detection device

Abstract

The invention discloses a TVLine detection method and a TVLine detection device. The method comprises steps: an RGB image of a test graph card is acquired, and the RGB image is converted to a YUV image; a least square method is used for positioning an interpretation area in the YUV image; the starting position and the termination position of a TVLine analysis line are determined according to the boundary information of the interpretation area, the TVLine analysis line interprets the interpretation area from the starting position until reaching a position at which the definition of the TVLine analysis line is smaller than a preset threshold, and the coordinate information of the position at which the definition of the TVLine analysis line is smaller than the preset threshold is recorded; and according to the coordinate information of the starting position, the coordinate information of the termination position and the recorded coordinate information of the position at which the definition of the TVLine analysis line is smaller than the preset threshold, a TVLine analysis value is calculated and outputted. Thus, the cost is low while the TVLine detection is completed automatically, and the method and the device are applicable to production test.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a TVLine detection method and device. Background technique [0002] Usually, the camera uses the TVLine method to measure its resolving power. TVLine can conveniently and intuitively display the resolution of the camera. However, in the process of production testing, the TVLine method will have many problems. For example, it is impossible to find a suitable method for automatic detection, and the analytical value of TVLine can only be interpreted manually, which greatly increases the randomness of interpretation. , affecting the final test results. [0003] The existing test program, on the one hand, uses the original positioning method to locate the interpretation area in the test chart, and the positioning accuracy is poor, which will lead to inaccurate test results; on the other hand, even if there is an accurate interpretation area positioning program or algorithm , but ...

AI Technical Summary

Problems solved by technology

[0004] In view of the problem that the prior art does not have a method that can accurately locate the interpretation area and detect TVLine at a reasonable price, the TVLine detection method and device of the present invention are proposed to solve or at least partially solve the above problems

Images