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coolbreeze

Interpolation will cause the 'leak' of transparent color

emm

If the image is large enough, will there be no difference to the human eye?

AL_

because A did not time its own alpha in the non-premultiplied?

muruc

because non-premultiplied doesn't consider B's alpha value and will eventually distort the color?

PsychotiK

non-premultiplied doesn't have B's alpha value included

aabedon

It was not premultiplied.

idkLinearAlgebra

It keeps color

doberdog91

Upsampling made the alpha mask edge fuzzy, which causes the green to leak out. Premultiplication kills the green in the cradle before upsampling.

fullkeyboardalchemist

because of non-premultiplied

haotingl

because it’s not premultiplied.

sunny99

non-premultiplied

jesshuifeng

because of the non-premultiplied

coffee

color is ignored in non-premultiplied

jin

Pre-multiplying stores the background color as black, not green. In the non-premultiplied version, the upsampled alpha includes the greener region at the edge.