传统的直方图均衡和灰度变换增强算法，不能针对红外图像的目标进行有效地增强。

Traditional histogram equalization and gray-scale transformation algorithms can't realize the enhancement of the target in the infrared image effectively.

youdao

为了定位特征值的指向，会使用到一个计算出的周围特征值的变换指向直方图来表示。

To determine the keypoint orientation, a gradient orientation histogram is computed in the neighbourhood of the keypoint.

youdao

我自己编写，直方图修正和彩色变换源代码。

I have written, histogram correction and color transform the source code.

youdao