The approximate invariance of the middle frequencies energy relationship between video adjacent frames under photometric distortion and spatial desynchronization is discovered by analysis.

通过分析发现了视频帧问中频能量关系对于光度失真和空间同步失真的近似不变性。

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And the image feature descriptor has a rotation, translation, scaling invariance, etc. it can be a very good to describe the shape and spatial distribution of information.

且获得的图像特征描述符具有旋转、平移、尺度不变性等优点，能够很好地描述图像的形状和空间分布信息。

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The infrared target recognition method based on the invariance of spectral Angle in time sequence is put forward in order to recognizing spatial target and balloon decoy.

为了识别空间目标与气球诱饵，提出了基于光谱角时序不变性的红外目标识别方法。

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