In the improved algorithm, the pre-processed image is smoothed and the proper gradient threshold is set to prevent the generation of insignificant regions.
该改进算法在预处理阶段对图像进行平滑操作并设置适当的梯度阈值，即减少了梯度图像中非重要区域的产生。
The histogram equalization can enhance the contrast by redistributing the gray levels, it has the drawback that it reduces the information in the processed image.
直方图均衡可以使图像灰度分布接近均匀，提高图像对比度，但图像的信息量会有一定程度的损失。
The spatial filter processing part (04b) performs a spatial filter process on the reduced image data reduced by the image data reduction part (04a) to generate a processed image data.
空间滤波处理部分(04b)对所述图像数据缩小部分(04a)所缩小的缩小后的图像数据执行空间滤波处理，以便生成经处理的图像数据。
The spatial filter processing part (04b) performs a spatial filter process on the reduced image data reduced by the image data reduction part (04a) to generate a processed image data.
空间滤波处理部分(04b)对所述图像数据缩小部分(04a)所缩小的缩小后的图像数据执行空间滤波处理，以便生成经处理的图像数据。
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