Wednesday, 25 April 2018

Can we change size of an JPEG image with out decoding and re-encoding it?

I want to convert a 640x480 JPEG image to 320x240. I know it can be done by decoding the JPEG image into raw YCbCr, scale it and re-encode it into JPEG. But is it possible possible with JPEG encoding to directly scale the image with out decoding?

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