hi,
I found out, that ippiCanny_16s8u_C1R does not work right
when fed with the output coming from ippiFilterSobelHoriz/Vert
functions.
Horizontal & vertical edges are found correctly. But diagonal
edges look strange.
When the output of ippiFilterSobelVert is negated and then
used as input for ippiCanny_16s8u_C1R it works perfectly.
In addition to that, I guess the kernels presented in the documentation do not match the implemented kernels (see attached demo program).
alexander pfaff
/* Demo program to show mismatch of implementation and documentation of
*
* ippiFilterSobelHoriz_XYZ
* ------------------------
* Kernel as shown in documentation:
* 1 2 1
* 0 0 0
* -1 -2 -1
* Kernel implemented in library:
* -1 -2 -1
* 0 0 0
* 1 2 1
*
* ippiFilterSobelVert_XYZ
* ------------------------
* Kernel as shown in documentation:
* -1 0 1
* -2 0 2
* -1 0 1
*
* Kernel implemented:
* 1 0 -1
* 2 0 -2
* 1 0 -1
*/
