There is no "right" way. Images with transparency are always shown flattened against some background. A chequerboard background is traditional because it clearly shows which areas of the image are entirely transparent. But it creates viewing problems when the image has areas that are only slightly transparent.niyanwen wrote: I am new to image processing, could you recommend what's the right way to view it? like by which software?
In Gimp, Edit | Preferences | Display can change transparency from checks to solid white, gray or black. Or Image |Flatten image will remove transparency.
Gimp's Color Picker can show RGBA values for individual pixels. This clearly shows that your images have areas of constant colour (RGB channels) but varying transparency (alpha channel).
Personally, I mostly use Microsoft Photo Viewer, and my own unpublished image editor. But Gimp can do the job.