3 ms·
Hard to tell. First: I'm a lowly developer here, right? I can't and won't sell you stuff. In addition: While I care a lot about my craft/developing, I don't car
by darklajid 13y ago
Hard to tell. First: I'm a lowly developer here, right? I can't and won't sell you stuff. In addition: While I care a lot about my craft/developing, I don't care about the industry - I'm blind to most competition.
Regarding your particular problem: No idea about international license plates (or the one you are interested in). It helps a lot to restrict engines to character sets. German license plates are roughly [1] ([A-Z]{1,3})-([A-Z]{1,2})(\d{1,4}) which helps a lot.
Usually you try to combine 'dumb' OCR with datasets/fuzzy matches to rule out errors. Only you know if that is possible for your dataset.
Depending on whether I understood your problem correctly we might again have the localization issue (which I complained about above): Find the licence plate, crop and rotate it. Bonus points if your images might contain multiple license plates and a human operator would 'obviously' see the right one..
Recognition itself should be okay: Limited character set, a limited number of fonts (here: One only) and hopefully decent binarization opportunities (here: black on white, background reflective).
Feel free to shoot me a mail, details in my profile.
1: From memory, might be slighly inaccurate, sample only
- beagle3 13y agoThanks! It's actually Israeli license plates I'm working on right now (because that's the video data set that I got for training so far, though this project is going to be deployed mostly around Europe) - only digits, a standard xx-xxx-xx template, nice standard retro-reflective black-on-yellow - supposed to be the easiest possible case. And it is, for humans. But all the commercial OCRs I managed to find have abysmal performance. When I get some breathing time, I'm going to try the latest Tesseract again (when I last tried, it was v2, and its performance wasn't good).
- darklajid 13y agoIf you look at my profile: I got a limited experience with Israel. The OCR company I work for? Sits in Israel.. ;-) I'm reasonably sure that you're not in the market for the things we do, but if you like to chat/want to talk about the project you're doing: Again, feel free to drop me a line. I .. really wouldn't even think about selling things or something, I'm mostly curious about fellow HN users' projects and have an affinity for IL. Good luck!