Image problems with Photoshop #1

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1. sdc0319 commented on May 7, 2021

   

   sdc0319

   on May 7, 2021

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   If I insert a Photoshop-edited jpeg image into the corresponding decoder, an error occurs while reading the file
   I want help with this ploblems.
   
   

   And I want to extract only the DCT coefficient from that image. Could you give me some advice?
2. Exaphis commented on May 7, 2021

   

   Exaphis

   on May 7, 2021

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   I believe the problem is because the code does not handle RST markers. If you are looking to extract the DCT coefficients, you can take a look at https://github.com/ImpulseAdventure/JPEGsnoop. If you enable Options->Scan Segment->Detailed Decode (enable detailed scan decode), it will output the DCT matrix.