[Image Processing] _ logarithm Transformation

[Image Processing] _ logarithm Transformation Algorithm Implementation

Logarithm transformation can achieve horizontal translation, vertical translation, symmetric transformation, and other operations of the image

It can also expand and compress images in gray scale.

The implementation code is as follows:

 

</PRE> <PRE name = "code" class = "CPP"> int logtranslation (MAT srcimg, mat dstimg, float a, float B, float C) {mat logtable (1,256, cv_8u); double temp; For (INT I = 0; I <256; I ++) {temp = Log (double) I + 1) /B + A; // logarithm transformation g (x, y) = ln (f (x, y) + 1)/(B * ln (c) +; if (temp <0.0) {temp = 0.0;} else if (temp> 255.0) {temp = 255.0;} logtable. data [I] = int (temp + 0.5); // rounding} LUT (srcimg, logtable, dstimg); imshow ("log", dstimg); waitkey (0 ); return 1 ;}

[Image Processing] _ logarithm Transformation