If you are more or less actively using the Internet in everyday work, then you probably know about such an unpleasant thing, which is captcha. Sometimes it interferes with the work so much that people often simply stop visiting those sites whose owners give her too much attention.
What it is?
By the way, what is captcha? Imagine that you went to some popular file hosting service. To download a file in free mode, you will have to enter in a special field a certain set of characters (often meaningless), which should be taken from the opposite picture.
The task is complicated by the fact that these symbols are sometimes completely impossible to make out, since they are deliberately made unreadable.
What is it for?
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Just before you get an indigestible captcha, and most of the characters are so illegible that it can take more than one day to solve them. Do you think the user will do such an ungrateful thing?
Of course not! He just goes to another site. Thus, if you are trying to protect your resource from fans of leaving spam in the comments, we advise you not to be too zealous.If you are too keen on captcha, quickly lose many active users. No users - no money from advertising. In addition, most of the normal resources automatically recognize comment spam, so there is often no sense in additional protection.
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And how to remove captcha, is it really possible to do this? Here the situation is rather ambiguous. The fact is that on many sites that use this type of anti-spam protection, not every user can read the captcha the first time, not to mention some applications.
Simple options can be recognized with the help of a small utility Screenshot Reader, which is part of the ABBYY FineReader software package. But she reads only the simplest forms of captcha, which can be easily recognized by any normal user. In addition, the process itself will not be able to be automated, since for recognition it is necessary to manually select the range of interest to you.Enter captcha
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Its symbols were easily distinguishable; no blurring or polarization technologies were used that would impede the work of programs for recognizing it. What was the secret?And it consisted in the fact that cats were sitting on the letters and numbers that had to be entered in the appropriate field. How many unpleasant words were said at the time to the creators of such a system! In the end, it was abandoned under pressure from the user community.
We buy the "antidote"
Another option is to contact a normal programmer (or a group, which is even better), so that he makes a utility for recognizing captcha on a specific site. Alas, universal solutions do not exist, if only because the protection is unique on each resource. Some typical solutions are very rare.
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