We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [ocr]

Tag for questions on Optical Character Recognition (OCR), including the Mathematica function TextRecognize[].

Filter by
Sorted by
Tagged with
60
votes
3answers
4k views

Applying TextRecognize on alpha-numerical table

From time to time I have to extract data from scanned papers or rasterized PDFs. Imagine a table of the following kind (but much longer): A naive application of ...
31
votes
3answers
2k views

How to detect crosses and circles in 60x60 raster images?

I have hand-written 60 pixel times 60 pixel squares. I need to detect whether they are empty, x or circle. TextRecognize function fails. Is there some other function to process this kind of raster ...
30
votes
1answer
2k views

Can TextRecognize read digits?

While answering this question, I tried TextRecognize to read single digits. But it doesn't recognize a single digit, even though the digits are clearly readable. ...
13
votes
1answer
2k views

Implementing OCR without using TextRecognize

I am new to Mathematica and trying to figure out whether it is a good tool for algorithmic exploration. So I had the idea of implementing a simple OCR with Mathematica, just using standard algorithms....
86
votes
1answer
12k views

Crack CAPTCHA using deep learning

Deep convolutional neural networks are very good at computer vision related tasks. Optical Character Recognition (OCR) is one important branch of computer vision. In fact, the convolution neural ...
27
votes
3answers
1k views

Improve TextRecognize[] on numbers

I have an image contain only numbers, and TextRecognize fail to recognize some numbers: img=; TextRecognize[img] (*826718*) The documentation says that "The ...
11
votes
2answers
2k views

Recognizing integers in an image

This is the picture I want Mathematica to read I want Mathematica to recognize these numbers and put them in a list. I know that there is a function TextRecognize, ...
13
votes
1answer
464 views

Use TextRecognize to grab timestamps from a video frame

I have microscope videos that have a timestamp overlay to them, and it would be great if I could extract this for each frame to add to my metadata. TextRecognize ...
0
votes
1answer
219 views

TextRecognize with crosses, circles and spaces results into oddities, why?

I am investigating this answer here about detecting crosses and circles with TextRecognize. I tried to solve this problem here by directly using the builtin command TextRecognize but it does not work ...
5
votes
1answer
171 views

Finding position of text returned with TextRecognize

I am trying to extract data from images (using some of the methods presented in [1524]), and would like to have a way to selectively cover/remove text from axes and legends. ...
2
votes
1answer
198 views

How to import Robinhood screenshots?

I use an iPhone app called Robinhood to trade stocks and I wanted to play with the portfolio with Mathematica's finance tools. So I took some screenshots of the app and I'm trying to import the ...
4
votes
2answers
366 views

How to improve the recognition quality when TextRecognize work on single character

Bug introduced in 11.0 and persisting through 11.3 From this answer, I doubt the capability to work on single character. So I give some test to verify this possibility. You can get my test ...