How can I import a PNG and unflatten it to create a pixmap whilst maintaining transparency in the image?
Even though I save the image with transparent pixels, when I bring it into my picture control using the "Read PNG File" and "Unflatten to Pixmap" VIs the transparent pixels are replaced with white ones. Is it something to do with a mask?
If I could find a way to return the content of my base image in the pixels where my alpha mask is - then I could use that to generate an image that gave the illusion of transparency?
If I could find a way to return the content of my base image in the pixels where my alpha mask is - then I could use that to generate an image that gave the illusion of transparency?
To create a semi-transparent image, you can break each pixel into its RGB values, average these values with the RGB values of what's supposed to be under it and then build the result back into the 32 bit numbers. I assume that for alpha transparency, you will need to do averaging which will take the alpha value into account. To get the RGB value, you can go over the image a loop and use the color to RGB VI, but I'm pretty sure using the Split number function on the 2D U32 array twice will also get you the correct values.
LabVIEW user groep 
