25-12-2013 дата публикации
Номер: CN103473745A
Принадлежит:
The invention discloses a low-dosage CT image processing method based on distinctive dictionaries. According to the method, first, single-layer decomposition is carried out on a low-dosage CT image to be processed through stationary wavelet transform, then, corresponding distinctive dictionary expression is carried out on high-frequency detail images in the horizontal direction, the vertical direction and the diagonal direction respectively, image artifacts are removed, and therefore information strength of the star-and-strip-shaped image artifacts in the high-frequency detail images in the different directions can be restrained; second, reverse stationary wavelet transform is carried out according to processed high-frequency detail images in the horizontal direction, the vertical direction and the diagonal direction and original low-frequency images to obtain a CT image with the image artifacts restrained through reconstruction; third, the CT image is further processed with an existing ...
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