IppiRotate IppiGetRotateShift

giacomo_c_ — Tue, 13 Jan 2015 12:50:49 GMT

From Ipp 8.2 documentation

1) IppiRotate :

angle : The angle of rotation in degrees. The source image is rotated counterclockwise around the origin (0,0).

IppiRotateCenter : ... This function rotates the ROI of the source image by angle degrees (counterclockwise for positive angle values)

while IppiGetRotateShift and AddRotateShift:

angle : The angle in degrees to rotate the image clockwise around the point with coordinates (xCenter, yCenter).

Positive angle is in opposite direction for the last 2 function?

2) While not documented function IppiRotateCenter can return also ( as warning I suppose) ippStsWrongIntersectROI. Is right?

Thank's

Giacomo C.

Hi Giacomo,

Valentin_K_Intel — Thu, 15 Jan 2015 22:40:31 GMT

Hi Giacomo,

Thank you for the questions.
1). I think that it is the misprint in the documentation. Positive angle is in the same direction for the all 4 functions.
2). The function ippiRotateCenter can return the warning ippStsWrongIntersectROI. It means that the rotated processed image ROI has no intersection with the destination ROI.

Best regards,
Valentin

tópico Hi Giacomo, na Intel® Integrated Performance Primitives

IppiRotate IppiGetRotateShift

Hi Giacomo,