Hello again!
Consider this a spinoff of my original article. I had some requests from the readers to explain how I developed the parser, and hen...
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This was a really fun and entertaining read! I really appreciated the step-by-step breakdown for how you thought about the problem, identified some key insights, and then implemented a solution. Thank you for sharing :)
Thank you!
Good to see you didn't run to TensorFlow right away. Sometimes you just don't need a billion samples and a 16-layer neural net.
Very nice article.
When I was studying I really liked my classes about signal processing. When I was reading your article I felt as I went back in time. 😁
I'm not sure if you have heard about salt and pepper? It's related to additional dots on an image. There are several techniques for removing such a noise like median filter. Maybe it would give even betterer results.
Thank you for your post.
Thanks!
Yes, I know about the median filter. Very recently had a semester long course in image processing. I had implemented region growing with this, to get great noise free skeletons. Will try with the median filter!
Got this result, with 2px radius.
I thought I would be better 🤔 Thanks for your time I appreciate it.
Image processing is a beautiful subject. With no knowledge about it I did my final year project on it. The fun part is that the algo you build will already exist and gives you the good feeling that we are doing something awesome. Good luck :)
So true.
After the clean-up step, did you try a simple OCR approach?
I appreciate the detail in the article, but that captcha looks so trivial I bet off the shelf OCR libraries could handle it without any preprocessing.
Sorry for the late reply, but yeah they most definitely would. I just wanted to do something real new cause I was new to programming and this was actually something that wasn't taught in class. Felt nice.
Thanks for writing this up! I enjoyed reading about how you solved the problem, and your explanation was super clear and helpful :) I'm amazed how easy this was to accomplish... I would have expecting clearing the lines would have been more difficult. What do you think you would have done if they were pure black like the letters?
Actually its cases like these where getting the best skeleton out of all the skeletons comes in handy
I would have eliminated single pixel thickness lines, by checking the top and bottom pixels I guess
Nicely explained! I was also trying to do similar thing some time ago using tesseract-ocr. It was not that accurate though :)
can you help me to solve this type of captcha? thepracticaldev.s3.amazonaws.com/i...
thepracticaldev.s3.amazonaws.com/i...
thepracticaldev.s3.amazonaws.com/i...
Hey! I've noticed that in this post you use "guys" as a reference to the entire community, which is not made up of only guys but a variety of community members.
I'm running an experiment and hope you'll participate. Would you consider changing "guys" to a more inclusive term? If you're open to that, please let me know when you've changed it and I'll delete this comment.
For more information and some alternate suggestions, see dev.to/seankilleen/a-quick-experim....
Thanks for considering!
This is why you use Google's reCAPTCHA :) the old traditional captcha is worthless nowadays, might as well not have it, it won't make much of a difference.
You may be surprised at the effectiveness of such simple CAPTCHA's.
On a website of mine, a CAPTCHA has neutralized spam messages. The CAPTCHA is more elaborate than this one, but still...Bad CAPTCHA's are better than nothing ;)
hi, i got a problem when running your script, want you help me? from the picture/captcha i send to you, which code in the script i can change?
(the bitmaps i can make by myself later)
thepracticaldev.s3.amazonaws.com/i...
What if the lines in the captcha are pure black as well. Could you help remove the unnecessary lines in the captcha and make blurred letters normal?
thepracticaldev.s3.amazonaws.com/i...
Hi in this code, I am getting an error LIST INDEX OUT OF RANGE
on this line if pixel_matrix[row, column] == 0 \
and pixel_matrix[row, column - 1] == 255 and pixel_matrix[row, column + 1] == 255
Also could you please explain how to create bitmaps.json file
Woah nice !
Priyansh jain i need your little help can you pass me your mail or ping me on vishalsha95570@gmail.com
Brilliant!
Thank you!
Awesome work!
A great read, very nicely solved problem, super work :)
Thanks for this article!!!
what about some captchas which their character's width is not a Specified value like this url's captcha
irsherkat.ssaa.ir/Captcha/Captcha....
Could you please help me
Please help me with this captcha
dev-to-uploads.s3.amazonaws.com/up...