retinex阴影去除 non linear processing on the image by the commercial camera used

Sensors are not Dirac Delta Functions but narrow band

Approximate invariant angle is obtained by the entropy minimization mehtod. Exact angle can only be found by camera calibration method-retinex shadow removing，non linear processing on the image by the commercial camera used

Sensors are not Dirac Delta Functions but narrow band

Approximate invariant angle is obtained by the entropy minimization mehtod. Exact angle can only be found by camera calibration method