此外还开发了增强型的梯度锐化算子，它既突出了边缘信息，又保留了低频信息，便于人和机器的一些后续处理。
The enhanced gradient operator was designed to stand out the edge of image and retain the low frequency information.
此外还开发了增强型的梯度锐化算子，它既突出了边缘信息，又保留了低频信息，便于人和机器的一些后续处理。
The enhanced gradient operator was designed to stand out the edge of image and retain the low frequency information.
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