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An image enhancement method suitable for underwater laser range-gated images

An underwater laser and image enhancement technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of large noise, poor contrast, uneven illumination, etc., and achieve the effect of solving large noise and competing for contrast

Inactive Publication Date: 2018-05-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In view of this, the present invention provides an image enhancement method suitable for underwater laser range-gated images, which solves the problems of large noise, poor contrast, and uneven illumination in underwater laser range-gated images. Made targeted enhancements

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  • An image enhancement method suitable for underwater laser range-gated images
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  • An image enhancement method suitable for underwater laser range-gated images

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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the drawings and embodiments.

[0035] The present invention relates to an image enhancement method suitable for underwater laser distance-gated images. Through the method of the present invention, image contrast and information entropy can be greatly improved, and image background noise can be suppressed.

[0036] The processing object of the present invention is the original image obtained by the underwater laser distance-gated imaging system, and the original image is collected by the ICCD in the underwater laser distance-gated imaging system. To superimpose the original images collected in 4 consecutive frames, the main step is to use the two-dimensional dual-platform histogram equalization and the Retinex method with estimation error suppression to process the superimposed image to obtain the enhanced result. image.

[0037] Aiming at the problems of large amount of noise, poor contrast, and uneven...

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Abstract

The invention discloses an image enhancement method suitable for underwater laser range-gated images, and relates to the field of underwater image enhancement. The laser distance gating image is superimposed, the background noise is filtered out, and the original image is obtained; then the original image is processed by the two-dimensional histogram equalization method to obtain the primary enhanced image; then, the primary enhanced image is processed by the Retinex method to obtain the secondary image Enhanced image; finally, the secondary enhanced image is gamma-corrected to obtain the final underwater laser range-gated enhanced image. The method solves the problems of large noise, poor contrast and uneven illumination in the underwater laser range-gated image, and enhances the image in a targeted manner.

Description

Technical field [0001] The invention relates to the field of underwater image enhancement, in particular to an image enhancement method suitable for underwater laser distance-gated images. Background technique [0002] The exploration, development and utilization of rivers, oceans and groundwater resources, as well as the defense of territorial waters sovereignty, require underwater high-resolution imaging equipment. Underwater photoelectric imaging technology has high resolution, and the imaging is intuitive and fast, which is a necessary technology for underwater equipment. The auxiliary lighting system for underwater photoelectric imaging will seriously interfere with the photodetector due to the backscattering of the water body, making the effective range of direct observation of the target and continuous illumination photoelectric imaging equipment short. Underwater laser distance-gated imaging technology is currently the most mature and effective underwater photoelectric i...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 许廷发苏畅罗璇卞紫阳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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