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liuruoze / EasyPR

(CGCSTCD'2017) An easy, flexible, and accurate plate recognition project for Chinese licenses in unconstrained situations. CGCSTCD = China Graduate Contest on Smart-city Technology and Creative Design
Apache License 2.0
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彩色图转灰度图的时候可以使用decolor #101

Closed DelightRun closed 8 years ago

DelightRun commented 8 years ago

传统的彩色图转灰度图算法对对比度不高的图片效果不好，因此OpenCV3中引入了个新方法叫decolor，建议使用此方法替换cvtColor。

文档：http://docs.opencv.org/3.0-beta/modules/photo/doc/decolor.html 论文：Cewu Lu, Li Xu, Jiaya Jia, “Contrast Preserving Decolorization”, IEEE International Conference on Computational Photography (ICCP), 2012.

liuruoze commented 8 years ago

谢谢建议，如果能够附上实际测试的效果就最好了。 这样可以非常清楚地看到这种对比度增强对于车牌识别的提升力度。

DelightRun commented 8 years ago

但是他那个函数有个bug，有的图片出来结果全是0，有空的话得分析下源码