CT image denoising method based on self-adaptive median filtering
A CT image, self-adaptive technology, applied in the field of medical image processing, image signal processing, can solve the problems of noise point interference reduction, image denoising ability limitation, can not remove the noise correctly, to reduce misjudgment, optimal Denoising effect, effect of protecting image details
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[0062] The present invention will be described in detail below according to the accompanying drawings and examples, but the specific implementation of the present invention is not limited thereto.
[0063] This embodiment illustrates the denoising process of the present invention applied to pulse noise in chest CT images of COVID-19. Embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings.
[0064] figure 1 It is an overall flowchart of the algorithm of the present invention, a CT image denoising method of adaptive median filtering, specifically comprising:
[0065] The median filter selects a square filter window with a size of 5×5, and according to the discriminant condition and To judge the suspected noise point of the impulse noise. first threshold T 0 The calculation principle of is formula (1), the maximum value and the minimum value of gray adaptive and The calculation principle of is based on t...
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