A method for realizing smooth filtering of medical digital images by using data memory

Abstract

Provided is a method for achieving medical digital image smoothing filtering through a data memory. The method for achieving medical digital image smoothing filtering through the data memory comprises the steps that (1) an N-bit medical digital image signal of a current frame with a pixel to be filtered is connected with a low N-bit address of a data read-only memory through a data bus, and the gray value of the N-bit medical digital image signal of the current frame with the pixel to be filtered serves as a low order address value of the data read-only memory; (2) a smoothing filtering value of a pixel, arranged on the position same as the position of the pixel of the current frame, of a previous frame is obtained, the smoothing filtering value is stored on a data random access memory, and the gray value represented by the smoothing filtering value serves as a high order address value of the data read-only memory; (3) the data stored at the position pointed by the low order address value and the high order address value of the data read-only memory are smoothing filtering data of the pixel, to be filtered, of the current frame; (4) the smoothing filtering data of the current frame are input into the data random access memory to serve as the smoothing filtering value of the pixel, at the position same as the position of the pixel of the previous frame, of the next frame in the process of processing; (5) the step (1) to (4) are repeated to accomplish smoothing filtering of the pixel of the position according to the number of image frames needing smoothing filtering. According to the method achieving medical digital image smoothing filtering through the data memory, CPU resources of a system are not occupied, and the requirement of the system for real-time processing of medical digital images can be completely met.

Description

technical field [0001] The invention relates to a video signal filtering technology, in particular to a method for realizing smooth filtering of medical digital images by using a data memory. Background technique [0002] In medical digital images such as ultrasound, X-ray machines, and CT, in addition to the noise caused by the interference of external factors, the imaging system itself will also generate various types of noise. On medical digital images, these noises appear as random bright spots of noise. Due to the existence of bright spots of noise, the quality of medical digital images is degraded, and serious cases may cause misdiagnosis by diagnosticians. Therefore, it is necessary to filter out the noise in medical digital images and improve the imaging quality of medical digital images. [0003] Image denoising or noise reduction is called image smoothing. The existing medical digital image smoothing and filtering technology mainly uses the processor CPU to achie...

AI Technical Summary

Problems solved by technology

Because the processor participates in the filtering operation, it occupies the CPU resources of the processor in the system, and in the case of serial operation, it will inevitably affect the system's requirements for real-time processing of medical digital images

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