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Second example

This second example uses a larger image (2955 × 2731 pixels). This results in a quite large PNG image that I didn't want to commit to this repository. So the following images are not the original ones that fell out of the encoding/decoding steps, but are JPEG-compressed. Perform the Reproduction steps by replacing porsche with cat and you will be able to generate the corresponding images yourself:

Original image:

Original image

Encoded image: -> too large (~11.5 MB) and perceptually the same as above (in my opinion).

Chunking of the original image (JPEG-version):

Encoded image with chunk overlay

Manipulated image (JPEG-version):

Manipulated image

Decoded image (JPEG-version):

Verified image with marked manipulated parts

image-stego/examples at main · dennis-tra/image-stego · GitHub