GizmoAlpha for Mac

This program is a utility to create an alpha (ie to definetransparent areas) of an image and create a mask as an image format.JPG and an image taking into account the transparency in PNGformat.� 

To do the job you have two kinds of tool:

• Various shapes of pen (square, circle or line) ofarbitrary size toerase the image or the mask.
• An eraser selecting a color range.
• It also allows you to change the width to height ratio ofyour imageswithout deforming and save them with an arbitrary size.