SoftwareOCR

 

Press Ctrl+Enter to quickly submit your post
Quick Reply  
 
 
  
 From:  Peter (BOUGHTONP)  
 To:  ALL
42338.1 
I have a photo of a printed spreadsheet of names and numbers, which I figured would be a piece of piss to run through OCR and get back into useful data, but it turns out not. :(

Giving the image to Tesseract-OCR it can detect the names fine - can't see any errors in any of the letters - but for some of the numbers it's doing a ridiculously bad job, even after processing the image to increase contrast and make things completely unambiguous, I still get "ns" in place of "118", or when the numbers are "0 124 97 221" it provides "Q 124 on eel"

Anyone know of OCR that can actually detect digits? Or even just something which behaves consistently - I can easily de-1337 if it simply mis-identifies - but not when "ee" might represent 77 or 84 or something else entirely! :@

0/0
 Reply   Quote More 

 From:  graphitone  
 To:  Peter (BOUGHTONP)     
42338.2 In reply to 42338.1 
Get typing.

0/0
 Reply   Quote More 

 From:  ANT_THOMAS  
 To:  Peter (BOUGHTONP)     
42338.3 In reply to 42338.1 
Hahahahaha, how have you ended up with that?

Probably could have typed it up by now.
0/0
 Reply   Quote More 

 From:  Peter (BOUGHTONP)  
 To:  ANT_THOMAS     
42338.4 In reply to 42338.3 
It's competition results from my climbing centre - usually they're also posted online, but the centre staff aren't given the ability to update the website, and it seems the person who does has forgotten or not bothered.

I could probably ask for an emailed copy, but I don't understand how detecting numerical digits can be difficult.

What's even more frustrating is that it's supposed to be possible to limit Terreract to only detecting digits, but it doesn't work - it turns out they removed the ability to blacklist/whitelist characters in the current version. :@

0/0
 Reply   Quote More 

 From:  ANT_THOMAS  
 To:  Peter (BOUGHTONP)     
42338.5 In reply to 42338.4 
I hope you've OCRed the names and typed the numbers by now. But you're right OCR software never seems accurate enough. Even trying to use it to read my electric meter was too much hassle for the time saving. And that was very regular characters. Probably could have put more effort in to find a way to give the OCR some history of characters to work with to make matching more accurate.
0/0
 Reply   Quote More 

 From:  CHYRON (DSMITHHFX)  
 To:  Peter (BOUGHTONP)     
42338.6 In reply to 42338.4 
Are you scanning it or taking a digital photo? Things like original print quality and typography will hugely affect accuracy. Also quality of the OCR software varies quite a bit.
“Does the red object left of the green cube have the same shape as the purple matte thing?”
0/0
 Reply   Quote More 

 From:  Peter (BOUGHTONP)  
 To:  ANT_THOMAS     
42338.7 In reply to 42338.5 
It's not urgent so I'm leaving it for now hoping someone will pop along with a miracle cure, or I'll just ask for the original file when I'm next in.

It is annoying it doesn't seem to have moved on in the past two decades - it should be possible to point OCR at anything, have it identify glyphs, then ask for feedback on which ones it got wrong, repeat until happy. Bleh.

0/0
 Reply   Quote More 

 From:  Peter (BOUGHTONP)  
 To:  CHYRON (DSMITHHFX)     
42338.8 In reply to 42338.6 
It's a photo taken with a digital compact, so there's a degree of noise and slight gradient, but there's no reason why it shouldn't be 99% OCR-able.

For example, attached is a crop of the row that gave "Q 124 on eel" - on its own it produces "124 97 2el", and in the first image (fixed horizontal/verticals, but gridlines still present and no brightness/contrast changes), it came closest with "0 124 on 221".

Attachments:

0/0
 Reply   Quote More 

 From:  Peter (BOUGHTONP)  
 To:  ALL
42338.9 
I had the thought of forgetting about OCR and searching for what I actually want, i.e: "image to spreadsheet conversion", which came up with this: https://online2pdf.com/convert-jpg-to-excel

The formatting it produced was all over the place, but it did a good job on the numbers - a handful of mistakes, mostly with zeroes. A couple of incorrect numbers (161->151 and 77->17) which were highlighted through the totals not matching, but compared to Tesseract it was brilliant.

Happy Peter -> :)

0/0
 Reply   Quote More 

 From:  CHYRON (DSMITHHFX)  
 To:  Peter (BOUGHTONP)     
42338.10 In reply to 42338.9 
I've had good luck with online OCR, though not tried for excel.
“Does the red object left of the green cube have the same shape as the purple matte thing?”
0/0
 Reply   Quote More 

 From:  Peter (BOUGHTONP)  
 To:  CHYRON (DSMITHHFX)     
42338.11 In reply to 42338.10 
I'm guessing it's mostly just regular OCR, but uses tabs if there's more than a single space, although the file I got back did have merged cells with a dozen spaces for some of the rows, suggesting buggy overcomplicated logic.

We need to set Stallman on them all.

0/0
 Reply   Quote More 

Reply to All    
 

1–11

Rate my interest:

Adjust text size : Smaller 10 Larger

Beehive Forum 1.5.2 |  FAQ |  Docs |  Support |  Donate! ©2002 - 2019 Project Beehive Forum

Forum Stats