Layer image A over image B using grayscale mask from image C

[prohtex]

I'm trying to perform a masking operation. I'd like to layer image A, which is a jpg, over image B, also a jpg, applying first an opacity mask in the form of a greyscale tif file to image A. I'm also rotating and scaling the mask as I load it. I'm able to create a png with transparency using this code:

Code: Select all

convert \( images/010-Scan-005.jpg \( mask.tif[5002x6238] -rotate 180 \) -alpha Off -compose CopyOpacity -composite images_depaper/010-Scan-005.jpg.png

but when i tie this together with the other image, the transparency does not seem to work:

Code: Select all

convert \( images/014-Scan-007.jpg \( mask.tif[4982x6230] -rotate 180 \) -alpha Off -compose CopyOpacity -composite \) test.jpg -composite images_depaper/014-Scan-007.jpg

Help! Thanks!

[snibgo]

... -compose CopyOpacity -composite \) test.jpg -composite images ...

Your "-compose" is a setting for "composite". But it affects both occurrences of "-composite". overriding the default (which is "over") for the second. So insert "-compose Over" before the second.