Reading characters from the screen

Question

I tried to find a solution to my problem for a long time. I need to create a program that reads data from the screen, recognizes characters and images, and then acts based on what characters and images. For example, I provide him with an image of a dog, an image of each possible character, and he will be able to read the screen and tell me where the dog was, where the characters were and in what order, etc. Is there a free library for this somewhere? I prefer something that can be used in C # or Vb.net

Answer 1

Common practice for character and tag recognition is called optical character recognition (OCR) and optical tag recognition (OMR). There are many options available, this is the best result on google:

http://www.leadtools.com/help/leadtools/v16/dh/to/leadtools.topics~leadtools.topics.usingomrinleadtoolsdotnetocr.html

However, if the ultimate goal is to solve ReCaptchas, then you have no chance.