Jerry Avins wrote:> Rob Vermeulen wrote: > > ... > >> The problem with OCR is that the algoritm only works accurately when >> text is >> placed on a solid background, which isn't the case in video material >> most of >> the time. I want to detect subtitles and other "overlayed text" but also >> "scene text" such as license places on cars and company logos on >> buildings. >> The text in the last category can also appear in every angle, rotated in >> every direction and even in perspective. >> What I need is more than just OCR. It must first do text-detection, >> classification, de-blurr filters and other preprocessing things before it >> recognizes characters. > > > There may be image enhancement processes that you could use to isolate > the letter outlines. Once you have that, you can put it on any > background you like. Some OCR programs may be able to use that > information directly. I can't begin to e stimatetheresourcesneeded. > They could well be excessive. > > Jerry??? I can't begin to estimate the resources needed. What happened? Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Text recognition in motion video
Started by ●August 3, 2004
Reply by ●August 4, 20042004-08-04
Reply by ●August 4, 20042004-08-04
Jerry Avins wrote:> Jerry Avins wrote: > >> Rob Vermeulen wrote: >> >> ... >> >>> The problem with OCR is that the algoritm only works accurately when >>> text is >>> placed on a solid background, which isn't the case in video material >>> most of >>> the time. I want to detect subtitles and other "overlayed text" but also >>> "scene text" such as license places on cars and company logos on >>> buildings. >>> The text in the last category can also appear in every angle, rotated in >>> every direction and even in perspective. >>> What I need is more than just OCR. It must first do text-detection, >>> classification, de-blurr filters and other preprocessing things >>> before it >>> recognizes characters. >> >> >> >> There may be image enhancement processes that you could use to isolate >> the letter outlines. Once you have that, you can put it on any >> background you like. Some OCR programs may be able to use that >> information directly. I can't begin to e stimatetheresourcesneeded. >> They could well be excessive. >> >> Jerry > > ??? > > I can't begin to e stimatetheresourcesneeded. > > What happened?Again! I can't begin to estimate the resources needed. I can't begin to estimate the resources needed. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●August 4, 20042004-08-04
On 2004-08-04 20:30:05 +0200, Jerry Avins <jya@ieee.org> said:> Jerry Avins wrote: > >> Jerry Avins wrote: >> >>> There may be image enhancement processes that you could use to isolate >>> the letter outlines. Once you have that, you can put it on any >>> background you like. Some OCR programs may be able to use that >>> information directly. I can't begin to e stimatetheresourcesneeded. >>> They could well be excessive. >>> >>> Jerry >> >> ??? >> >> I can't begin to e stimatetheresourcesneeded. >> >> What happened? > > Again! > > I can't begin to estimate the resources needed. > > I can't begin to > estimate > the > resources > needed. > > JerryMaybe you have some weird text enhancement processes messing up your posting... :-) Btw: only the quoted text appears messed up, the original looks good on my end (individual.net). Cheers, Stephan -- Stephan M. Bernsee http://www.dspdimension.com
Reply by ●August 6, 20042004-08-06
"Jerry Avins" <jya@ieee.org> wrote in message news:4110fdd0$0$2825$61fed72c@news.rcn.com...> There may be image enhancement processes that you could use to isolate > the letter outlines. Once you have that, you can put it on any > background you like. Some OCR programs may be able to use that > information directly. I can't begin to estimate the resources needed. > They could well be excessive.I'm familiar with image processing / filtering methods and I think I could figure out a way to separate text from the rest of the image. (Probably a combination of edge detection & classification). Perhaps this will make gocr work better, because I only got garbage out when feeding it with frames from my video database. But I think there's a different approach necessary. Some approach that I'm not familiar with. And there's also the 'speed' component. I'd prefer if a routine worked realtime and even faster. I've already got an archive of 10000 hours of video which need to be searched. I'd hate to see that it takes 20000 hours to process 10000 hours of material. Anyway, its worth sorting this out and I like the matter, so I'll be doing research on this for quite some time, I think :-) If someone else can come up with good suggestions, I'd appreciate it. Best regards, Rob
