A denoising processing system and method of a three-dimensional filter denoising algorithm
A technology of three-dimensional filtering and processing methods, which is applied in the directions of image data processing, calculation, image enhancement, etc., can solve the problems of complex algorithms, difficult to meet real-time denoising processing occasions and hardware implementation, and achieve low computational complexity and good performance. Effect of denoising and adaptability, low resource usage
Active Publication Date: 2019-11-15
XIDIAN UNIV
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[0004] The purpose of the present invention is to provide a denoising processing system and method of a three-dimensional filter denoising algorithm, aiming to solve the problem that the existing image denoising algorithm is too complicated, and it is difficult to meet the requirements of real-time denoising processing and hardware implementation and application Problems with real-time processing in the camera
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[0049] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0050] Aiming at the problem that the current image denoising algorithm is too complicated, it is difficult to meet the occasions requiring real-time denoising processing and the problem of hardware implementation and application to the camera for real-time processing, the present invention proposes a denoising processing system of a three-dimensional filtering denoising algorithm Compared with the traditional denoising algorithm, it has a better denoising effect, and can complete real-time denoising processing on the camera.
[0051] The application principle of the present invention will be described in detail below in co...
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The invention discloses a denoising processing system and method for a three-dimensional filtering denoising algorithm, which includes an image cache unit, a block matching unit, a three-dimensional filtering unit and an aggregation unit, an image cache unit, a block matching unit, a three-dimensional filtering unit and an aggregation unit in sequence Connection; the method is: divide the original image part into N 4x4 reference blocks; each reference block performs full search block matching within its own 7x7 search area; select the 8 candidate blocks with the smallest SAD as matching blocks; pair 8 Perform a 3-dimensional Hadamard transform on each matching block; perform hard threshold processing based on the noise estimation parameters; perform a 3-dimensional Hadamard inverse transform on the resulting 8 matrices; then map them back to their original positions in the image, and map the Estimates are averaged. The present invention performs filtering and denoising based on noise estimation parameters, has good denoising effect, has low system resource occupancy rate, and can achieve high-speed real-time denoising processing.
Description
technical field [0001] The invention belongs to the technical field of digital image processing, and in particular relates to a denoising processing system and method of a three-dimensional filtering denoising algorithm. Background technique [0002] During the shooting and transmission of the image, noise is introduced due to the limitations of the devices used and the transmission channel, which affects the visual effect of the image, and many details in the image are covered by noise, which even interferes with the subsequent processing of the image. Advanced processing, such as edge detection, image segmentation, feature recognition, image fusion, etc. So image denoising is a very important work in the field of digital image processing. [0003] Many of the image denoising algorithms with better effects proposed at present are based on software methods. In the process of hardware implementation, these algorithms are too complicated to meet the requirements of real-time ...
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IPC IPC(8): G06T5/00
CPCG06T5/70
Inventor 宋锐米彦逢贾丽敏贾媛李云松王养利
Owner XIDIAN UNIV