contentful-labs / Concorde

Download and decode progressive JPEGs on iOS.
MIT License
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Help~ #19

Open Fishbonelsy opened 7 years ago

Fishbonelsy commented 7 years ago

I want to develop the component in Java.But I can't find detailed description of ProgressiveJpeg format when searching on Google.Please guide me where I can get detailed information about ProgressiveJpeg.

mariobodemann commented 7 years ago

Hey,

thanks for taking a look, sadly, I have never done something similar, but did you take a look at http://www.programcreek.com/java-api-examples/index.php?class=javax.imageio.ImageWriteParam&method=setProgressiveMode ? There seems to be a related method in javax.imageio.ImageWriteParam, but sadly I cannot state if this route is a valid one or not...

loudmouth commented 7 years ago

Hey @Fishbonelsy , another resource you might want to check out for inspiration is the new progressive JPEG decoding library that Twitter just open sourced. You also might want to check out this Android library provided by Facebook that Twitter claims is leverages.