why JPEG,JPG is lossy?

Posted 10 January 2014 - 04:39 PM

can anyone explain why JPEG is lossy? while its file size is not that small
and PNG-24 remain in good quality even i uploaded the photo on web

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Posted 10 January 2014 - 05:14 PM

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Posted 11 January 2014 - 03:53 AM

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Posted 11 January 2014 - 08:39 AM

how JPEG lose its quality?

JPEGs lose quality because when it is compressed, it removes pixel information. Less information = smaller file size.
PNGs are compressed differently. It creates a smaller file size but it doesn't remove pixel information, so the quality is usually better

I hope this is helpful

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Posted 11 January 2014 - 10:51 AM

JPEGs lose quality because when it is compressed, it removes pixel information. Less information = smaller file size.
PNGs are compressed differently. It creates a smaller file size but it doesn't remove pixel information, so the quality is usually better

I hope this is helpful

wow~! thanks

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Posted 15 January 2014 - 01:13 AM

wow~! thanks

You are welcome If it helps, I found this resource for you or anyone to use for reference, to know what type of file is best for web/screen:
image - PNG vs. GIF vs. JPEG - When best to use? - Stack Overflow

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