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@@ -26,9 +26,9 @@ get_resolve_map.py和get_uniform_map.py主要是做降维后新的像素值的
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### 颜色矩
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颜色是彩色图像最重要的内容之一,被广泛用于图像检索中。但从图像中提取颜色特征时,很多算法都先要对图像进行量化处理。量化处理容易导致误检,并且产生的图像特征维数较高,不利于检索。AMA Stricker和M Orengo提出了颜色矩的方法,颜色矩是一种简单有效的颜色特征表示方法,有一阶矩(均值,mean)、二阶矩(方差, variance)和三阶矩(斜度,skewness)等,由于颜色信息主要分布于低阶矩中,所以用一阶矩,二阶矩和三阶矩足以表达图像的颜色分布,颜色矩已证明可有效地表示图像中的颜色分布,该方法的优点在于:不需要颜色空间量化,特征向量维数低;但实验发现该方法的检索效率比较低,因而在实际应用中往往用来过滤图像以缩小检索范围。<br>
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### 颜色直方图
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![RGB-histogram](https://github.com/1044197988/Python-Image-feature-extraction/tree/master/Image/RGB-histogram.png)
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![gray-histogram](https://github.com/1044197988/Python-Image-feature-extraction/tree/master/Image/gray-histogram.png)
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![histogram](https://github.com/1044197988/Python-Image-feature-extraction/tree/master/Image/histogram.png)
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![RGB-histogram](https://github.com/1044197988/Python-Image-feature-extraction/blob/master/Image/RGB-histogram.png)
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![gray-histogram](https://github.com/1044197988/Python-Image-feature-extraction/blob/master/Image/gray-histogram.png)
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![histogram](https://github.com/1044197988/Python-Image-feature-extraction/blob/master/Image/histogram.png)
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# 参考
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* [michael92ht/LBP](https://github.com/michael92ht/LBP)
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* [tzm030329/GLCM](https://github.com/tzm030329/GLCM)

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