...灰度对比度； 线性支持向量机 [gap=1020]Key words：fingerprint image segmentation; Fourier spectrum energy ratio; gray contract; linear support vector machine ...
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By increasing the intervals of gray levels, enhancing gray contrast is implemented by the traditional gray enhancement algorithms.
传统的图像灰度增强方法通过增大灰度级别的间距来达到增加图像灰度对比度的目的。
参考来源 - 图像灰度增强算法的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
实验对比表明，这种改进的灰度对比度函数，计算时间复杂度较简单，对焦灵敏度高。
The comparison shows that the improved gray scale contrast function has simpler time computational complexity and higher focusing sensitivity.
传统的图像灰度增强方法通过增大灰度级别的间距来达到增加图像灰度对比度的目的。
By increasing the intervals of gray levels, enhancing gray contrast is implemented by the traditional gray enhancement algorithms.
背景灰度相比其他阅读器浅了几个层次，让黑色文本在背景上有着更高的对比度。
The background gray is a few shades lighter than on any other reader, producing much better contrast behind the black text.
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