Yea, that’s what I mean. I call rubbish anything that gets thrown away though, so for me a banana skin is still rubbish but it is not bad in the same way as a plastic bottle. I probably wasn’t clear enough in my downvoted first comment. But I am sick, so forgive me.
As others have said, using a flat bed scanner will save some work. If you need to photograph it though:
Use paper with grid lines as background (not sure the name, used to use it in maths at school). This will give you not just an index for scale but also for ‘squareness’.
Position camera perpendicular to subject
Use a telephoto or zoom lens from a distance rather than wide angle from close up to minimise lens distortion.
Import image into GIMP or photoshop and use rulers, guides and transform tools to scale the image correctly and make it perfectly square.
Matching the colour perfectly is more complicated and I won’t go into that here.
Let me know if you need any more tips. I photograph a lot of artwork and documents.