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Captcha solving bot python
Captcha solving bot python












captcha solving bot python

Return answer print( ocr( sys.You asked a very interesting question that I am going to give an interesting answer too. T = t # 5-letter captcha final = sorted( t, key = lambda e: e) size):īlack = True for y in range( letters. # Clean the background noise, if color != white, then set to black. įrom PIL import Image def ocr( im, threshold = 200, alphabet = "0123456789abcdef"): Thus, we need 5 letters with maximum ordered by. The result is the CAPTCHA text.īe the distance of the image, with the letter in position Then sort by score, take the top five results (our captcha is five letters) and finally sort by position. Then, store for each letter the position where the maximum score found.

captcha solving bot python

Thus for each position we have a score of how much the letter (mask) fits the letter behind it. Move each letter across the image and take the difference of the pixels for each position and sum them. So, now we have the image almost cleared and some letters to play with. Here is the example after the filtering (cropping also applied). We turned the image to greyscale, then used a threshold to remove some of the noise. After playing with several techniques we finally ended to the following. As you can notice there is some noise which we have to remove (lines and stuff). You have to be very careful so all the letters be aligned properly. Then, using a simple image editor we cropped all the letters, one by one.

captcha solving bot python captcha solving bot python

To achieve that, first of all we sampled several images so as to be sure that the images we have contains all the 16 letters. The first part was to to extract all the letters. Also, the alphabet is simple lowercase hexadecimal letters. This makes extracting the letters and using them as masks to check each digit, one by one, very easy. In this example we are going to use the following images.įirst of all, a fixed size (monospace) font has been used. Use the force to find something more complex. This is a simple solver for a very specific and easy-to-solve CAPTCHAs like the one proposed here. Simple CAPTCHA solver in python Disclaimer














Captcha solving bot python