Hi,
On 14/5/03 10:25 AM, "arm pdlist" arm_pdlist@yahoo.co.uk wrote:
Anyone, please?
--- arm pdlist arm_pdlist@yahoo.co.uk wrote: > I've been trying to do some alpha masks with the
"alpha" object and some images and videos. I have two images where all the black is ignored and the other colors appear (just like i wanted). But around the edges of a pic where i have black and some other color, there is some "noise" in the mask...
I understand the problem.
Do you know how i can eliminate or minimize this "noise"? I've tried "pix_mask", but since in this project i use video too, my system crashes (i'm using xin xp). Is there any way to resolve this?
I'll try to fix the pix_mask crash, but I don't think that will solve this problem.
You need to ensure that the alpha channel of your image mask is feathered at the edges: it's not just 0 or 1 but has a smooth transition at the mask edges. By far the easiest way to do this for static images is to use an image editor that can feather in the alpha channel and save the image with alpha.
I believe that JPEGs can store alpha, but you're likely to get some chunkiness in the feathering unless you use quite high quality levels. Otherwise you can use TIFF of course.
Daniel