possible bug in -transform doing a skew in IM 6.4.2-6
Posted: 2008-08-05T12:37:50-07:00
IM 6.4.2-6 Q16 Mac OSX Tiger
Doing a horizontal skew of the bottom to the left (top to the right) leaves a one pixel line extended at the bottom right of the image, this does not show in any other skew direction.
For example:
ang=-20
sinang=`convert xc: -format "%[fx:sin($ang*pi/180)]" info:`
convert rose: -affine 1,0,$sinang,1,0,0 -transform rose_skewxm20.png
Doing a horizontal skew of the bottom to the left (top to the right) leaves a one pixel line extended at the bottom right of the image, this does not show in any other skew direction.
For example:
ang=-20
sinang=`convert xc: -format "%[fx:sin($ang*pi/180)]" info:`
convert rose: -affine 1,0,$sinang,1,0,0 -transform rose_skewxm20.png