C# Image Recognition

Posted on March 13, 2011 by HotNoob

Sorry for not posting anything lately, I’ve been too busy to find topics with programing some image recognition algorithms.

Here is a clip of what I’ve been doing lately:

working example:

This entry was posted in Gaming, Geekz. Bookmark the permalink.

9 Responses to C# Image Recognition

  1. Mr. X says:
    March 17, 2011 at 5:10 pm

    I like what your doing. I can see lots of room for improvement too. I noticed that you loop from left to right and top to bottom on comparing pixels. So I assume you must search the screen capture in a similar manner. If speed is an issue, I would suggest searching from the center of the source image outward or even try checking pixels in half way iterations in a divide and conquer algorithm. I don’t see much on the Internet for techniques in monitoring a game but I would presume it would be reasonable to have the program save the typical destination of where the searched image is found.

    I play this game frequently and I would really like to see your program come to fruition. Send me an e-mail with the source and we’ll talk!

    • HotNoob says:
      March 17, 2011 at 6:47 pm

      searching from the inside to out would actually greatly increase the required time, since it would be adding a lot more value checks.

      right now it searches the screenshot for an image in less than 10ms, while using less than 10% cpu, which is better than all of the current .net based image searching libraries. Most of them take 1+ seconds.

      your assuming that i’m some amateur programmer who can’t program worth diddley squat.

      • Mr. X says:
        March 18, 2011 at 5:44 pm

        So you must be using a Boyer-Moore type algorithm to scan in one direction? Computers are much faster now-a-days anyway but image searching isn’t quite there for fractal image compression to be practical. I rewrote a Windows screen saver I made in pure Assembly language to get it to a reasonable screen rate.

        I like the blog. Ideas intrinsically have value. I was getting my hair cut and the barber asked what I did and I told him I was making cell phone apps at the time. Impressed as he was, I turned it on him and asked, “what kind of a novel app do you think is needed” and he was dumbstruck. So the lesson is that you really need to be keen on finding something useful and desirable.

        There’s a niche that your blog is filling and I have some ideas that would work off of what I see. Besides playing with 3D algorithms in Processing.org lately, in the past month I had come up with how I could apply Artificial Intelligence algorithms to a game involving lots of economical decisions. If there is still a need for speed for your program, I’ve thought of a more involved solution for image scanning.

        There’s always potential in someone who is willing to engineer around a problem and work out a program. The higher level of mathematics that are involved in a line of work, the greater the pay is. Send me an e-mail. I’m still interested in seeing your program too.

  2. Timi2fly says:
    August 21, 2012 at 11:21 am

    Hi there. I am learning c# and was wondering if you might consider selling your image recognition / detection code in c# for me to use and learn from? I would love to hear from you. Cheers, Tim.

    • HotNoob says:
      August 23, 2012 at 8:11 pm

      yeah sure… whats your offer?

      • Timi2fly says:
        August 29, 2012 at 9:18 am

        AU$25 …. and another $25 once it’s working as you have it on your youtube videos. So AU$50 all up ….. quite a reasonable offer I would imagine.

        I am just new to C# but I have been working on some image detection code but it’s just not fast enough. I saw your videos working on the flash games and your code seems pretty responsive. Any idea how long it takes to detect an image using your code ?

        Let me know what you think.

        Cheers !

        Tim

        • HotNoob says:
          September 2, 2012 at 12:05 pm

          not really… considering that its the only decent .net based image recognition library out there…

          and the last person i let get a hold of it started up his own bots, which directly compete with me, making me lost $600 a month.

          • Timi2fly says:
            September 4, 2012 at 6:32 am

            No troubles. Unfortunately I can’t really justify more than that because it is just for my own use and own learning – I have no commercial interests in making bots to sell to others.

            Anyway, I have learnt a lot since I made the first post and now have my image recognition down to <200ms for a full 1920×1080 screen. This is a long way off the 5-6 seconds it was taking me with my earlier rounds of code.

            I would still be interested if you have any advice for me, as I respect the skills you have.

            If you don't mind putting me on the right track can you answer this one question ? How do you incorporate a % tolerance into your image recognition methods?

            Cheers !

          • HotNoob says:
            September 8, 2012 at 3:50 pm

            well i guess if its just for you i can get it to you for $50.
            add me on skype: hotnoob.

Leave a Reply