Dear all, I build some masks with scilab, that I want to apply later on a set of images. I can build these masks a batch process, because I have pixel coordinates that define the mask coordinates. Each mask itself will be an image.... For now I use xs2svg and/or xs2png
Now: Is there a way to export images from scilab applying alpha channel? I ask, because several masks will be layered on top of each other...together with a mask that is build manually by a user. To get the final result I - for now - have to make each (mask-) image a bit transparent, to still see the underlaying image. Thus I loose the original color of the mask image. I could probably build an R-G-B-alpha image such as: img = zeros[imgHeight, imgWidht ,4]; R = img[ : , : ,1]; G = img[ : , : ,2]; B = img[ : , : ,3]; A = img[ : , : ,4]; and than set the right pixel values at the right positions. However: It seems, that it is not possible to add the alpha channel to an image when exporting it to a native image file..such as png. imwrite (IPCV-toolbox) seems to support only 8bit (one-channel) or 24bit (3-channel) image. Many thanks, Philipp
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