ENGLISH VIDEO GUIDE
Does a Bigger PNG File Give Better Coloring Page Lines?
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Compare PNG storage size and image detail with a controlled same-pixel test.
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Transcript
Does a bigger PNG file give better coloring page outlines? Not automatically. File size tells you how much storage a file uses. It does not, by itself, tell you how much useful detail the picture contains. We tested this distinction with two encodings of one illustration.
We drew an original house illustration at six hundred forty by four hundred eighty pixels. We saved it at PNG compression levels zero and nine. One file contained nine hundred twenty two thousand four hundred forty six bytes. The other contained only two thousand seven hundred fifty four. Their decoded pixels were identical. This was a digital illustration, not a photograph.
We opened each file separately in Chrome, chose Clean Outline and A four, generated the page and downloaded the PNG. These are the actual exported pages. Both measured thirty five hundred eight by twenty four hundred eighty pixels. Both contained four hundred six thousand sixty bytes. Their file fingerprints matched, with zero changed pixels. This was a local test using the current production files.
For this picture and these settings, the larger input gave no different outline. PNG compression does not add missing detail. Compare the actual picture and its dimensions before choosing a file. Resizing, changing colors or converting a damaged source is a different question. This test does not cover every browser, style or physical printer. Read the linked guide for the original files, measurements and limitations.