Help with PhotoShop and PNG-32 Bit

BC
Posted By
Brian_Clingan
Oct 17, 2003
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792
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1
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Closed
Given a PNG-24 image file, PhotoShop has the ability to adjust the transparency of an individual pixel. When saved, the file becomes approximately 25% larger. Is this because PhotoShop is creating an "alph channel" for each pixel in the file? If so, is the resulting file really a PNG-32 image file?
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hot_denim
Oct 20, 2003
If the file was created in another application then;

Photoshop saves the PNG file with less compression (assuming creator application saved it with more), resulting in a bigger filesize (regardless of whether it does or does not add an Alph a Channel. I don’t think it would unless you told it).

Thus still 24-bit PNG.

How to Master Sharpening in Photoshop

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