Method for generating image without time resolution limit based on light machine scanning signal
A scanning imaging and scanning signal technology, which is applied in image communication, TV system scanning details, TV, etc., can solve the problems of simultaneous information doping, inconsistent collection time of different pixels, and limited collection frequency, so as to improve time and space. resolution, overcoming the effect of inconsistencies in acquisition time
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Embodiment 1
[0043] Use an optical-mechanical scanning thermal imager to read the detected target information one by one to obtain its image signal. Any frame of the image signal includes the temperature values of all pixels and their corresponding acquisition time. The image signal is stored in a known memory by frame, and then The display unit of the optical-mechanical scanning imaging system converts the image signal in the known memory into an image, and the image signal needs to be processed sequentially according to the following steps before being sent to the display unit for display:
[0044] refer to figure 1 ,
[0045] (1) Read in the temperature values of all pixels on a certain frame and their corresponding acquisition time;
[0046] (2) Use the general small-window weighted smoothing filter method to denoise the image signal of the detection target. The specific method is to replace the value of the center pixel point of the template with the average value in the template, ...
Embodiment 2
[0056] According to the method of Example 1, when using an optical machine scanning thermal imager to perform infrared thermal wave nondestructive testing on samples with weak thermal diffusion capabilities such as composite materials, organic materials, and glass fiber reinforced plastics, the thermal change is not too fast, but due to the comparison of acquisition time As time goes on, the impact of thermal diffusion on the collected data is gradually expanding. During processing, d m Generally, the value of can be set slightly larger, and the image collected by the opto-mechanical scanning imaging system can be generated into an image without time resolution limitation.
Embodiment 3
[0058] In the infrared thermal wave nondestructive testing of metal samples, the thermal wave changes very quickly, and the thermal change process is basically concentrated in a certain frame or two frames of the optical-mechanical scanning image. Directly observing the collected thermal wave images, it is completely impossible to distinguish different regions. position and size. By performing the first correlation fitting analysis on the pixels, the thermal process can be basically separated from the thermal equilibrium state, and then the second fitting analysis can be performed to distinguish different characteristic regions. During processing, d m The value of can generally be set to be small, because the heat diffusion ability of metal is extremely strong, and different regions affect each other, which will make the difference between different regions become very inconspicuous. If d m The value of is large, and it is impossible to separate them at all. Of course, d m I...
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