DGTouch provides Alpha Masking Service to you

The term alpha masking technically refers to the fourth channel in an RGBA image file, regardless of whether that channel is used for communicating transparency information. However, since that fourth channel is used so often to communicate transparency information, the terms alpha and transparency have become nearly synonymous in common usage. It’s important to remember, though, that this connection is essentially arbitrary. Some formats may use other channels for transparency information while other formats may use the fourth channel for something other than transparency information. An alpha is a type of mask that can be thought of as selections using some or all of the 256 available levels of gray, instead of a selecting outline. In other words, alpha channels store selections as 8-bit grayscale images.

In alpha masking, selected pixels are white, black pixels are unselected, and anything in between is partially selected or partially unselected depending on whether you think the glass is half full or half empty. Alpha Masking isolates images using selection, contrast in color channels that takes images in Tiff or PSD format. DGTouch requires only 15 to 20 minutes for the task.