As others have suggested- this is not a project where stitching together OSS OCR bits is going to yield anywhere near useful results. Overall at multiple levels

As others have suggested- this is not a project where stitching together OSS OCR bits is going to yield anywhere near useful results. Overall at multiple levels of the stack the error bars on the tech bits are really wide and narrowing them is still a research project. This is why most of the suggestions are- if you want a workable solution, brute-force cheap human Mechanical Turk is the only option. However, if you are looking for a project, picking one grocery store with one receipt format and generally limited/consistent product coding schemes is a reasonable thing to plug away on. Speaking personally I did this with Whole Foods receipts for a while and was able to get to almost, kinda usable. But then the pandemic hit and I started ordering delivery which obviates the whole receipt ingestion thing because I can get all those details directly from Amazon (modulo doing some data scraping). Analytics on food purchases are a tremendously interesting and deeply underexplored space in which there is lots of future commercial potential.