High-precision rapid focus detection method based on push-broom underwater hyperspectral original image
A raw image, hyperspectral technology, applied in the field of focus detection of push-broom hyperspectral cameras, can solve the problems of the accuracy and focus accuracy need to be improved, the real-time performance is insufficient, and the focus efficiency is low, so as to improve the downsampling processing effect. , the effect of saving calculation time, removing speckle noise
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Embodiment 1
[0111] A high-precision fast focus detection method based on push-broom underwater hyperspectral raw images, such as figure 1 shown, including the following steps:
[0112] Step S1: the focusing stepping motor, according to a certain number of rotation steps, sequentially collect the original underwater hyperspectral image at the number of rotation steps of the focusing stepping motor;
[0113] Step S2: Perform bilinear interpolation downsampling on the original push-broom underwater hyperspectral image based on peak signal-to-noise ratio (PSNR) and structural similarity (SSIM) to obtain the sampling of the original push-broom underwater hyperspectral image picture;
[0114] Step S3: Using an adaptive noise suppression method based on the edge preservation index (EPI), perform noise suppression on the sampling image of the push-broom underwater hyperspectral original image, and realize the improvement of the contrast of the sampling image of the push-broom underwater hyperspe...
Embodiment 2
[0123] According to a kind of high-precision fast focusing method based on the push-broom underwater hyperspectral original image described in Embodiment 1, the difference is that:
[0124]The push-broom underwater hyperspectral camera system is divided into front and rear stepping motors and left and right stepping motors. The front and rear stepping motors control the position of the object surface along the optical axis, and the left and right stepping motors control the movement of the precision displacement platform to realize underwater scenes and land Spatial-dimensional imaging of complex scenes. The motor speed range is 10-50r / min, the motor rotation step range is 10000-80000 steps, the step length of the motor rotation is 12800 steps, and the position of the object surface along the optical axis is adjusted by 0.25mm for one rotation of the motor. The push-broom underwater hyperspectral camera adopts the Prosilica GT2050 camera of the Prosilica GT series from Allied ...
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