图2. (a) 预处理前的磁共振图像(左)及其灰度直方图(右);(b)经CLAHE预处理后的图像(左)及其灰度直方图(右)
Fig.2. (a) The magnetic resonance image before pre-processing (left) and its gray histogram (right); (b) The magnetic resonance image after CLAHE algorithm pre-processing and its gray histogram (right)