Imagesearch using gdip

[rakesha002]

Hello,

I need help in Imagesearch using gdip to fit my needs (my requirements are very complicated, sorry)

Haystack.png (7.07 KiB) Viewed 953 times

In Haystack- same symbol 5 times, 1 time it is inverted, i need to find the inverted one,
The color, rotation, size, width of symbol varies (may not be the same) and
Every time i refresh window a new haystack with new symbol (same symbol 5 times and one inverted)

I tried converting Haystack into monochrome which reduces color issue-------1
I could use gdip rotate functions which reduces rotation problem---------------2 takes much time, and so on for other parameters
for which entire process will much more time because i had to search many needles to find the right one first shape and then other parameters,

What I really want to ask gdip and image-search coding experts is,
is there a better way to find my needle or perhaps finding all non-rotated symbols to find the black sheep (in that case i need an example code).
Thanks in advance.
note : i am not an expert in this by the way.

[mikeyww]

One idea is to use optical character recognition to read the text, and then see if the text matches what you need. I do not know whether it will work.

[rakesha002]

Hi,

Thanks for the quick reply,
Tried the OCR thing, actually a few which are close to end result but not accurate for my situation, sorry i forgot to mention that.

[mikeyww]

Since color, rotation, and size may vary, you are looking at a pattern matcher rather than a single AHK command. There are some face recognition scripts on the forum that you might be able to adapt somehow.

[rakesha002]

Hi mikeyww,

Now That's a new angle to look, nice suggestion, i will try and search in the forum meanwhile can you point me out bit more
if it is possible, thanks

Edit: You gave me good and new thinking angle about "pattern matcher" if i could find pattern of similar symbol, it is easy but it is way over my head.
Any further help is much appreciated Thanks.

[mikeyww]

I can't add much. I don't think it will be very easy, but with enough effort, could be done! If you search the forum for "face recognition", there are some scripts by @malcev there.

[rakesha002]

Hello,

I'm trying to dig deep as "mikeyww" suggested, with no success,
i still need help, i'm all ears(eyes actually to read), any help, any suggestion would be great, thanks.

[malcev]

You can look for python+opencv examples how to do it.

[rakesha002]

Hi,

I will try that first thing tomorrow,
A link (if it is possible only) would be a great help, where to start instead of searching the web. Any way thanks for Suggestion.

Thanks

[malcev]

I did not do it, therefore I dont have links.
May be it can be done with cvFindContours.
We discussed about it here:
https://www.autohotkey.com/boards/viewtopic.php?f=76&t=77046
And after that compare contours with cvMatchShapes function.
https://docs.opencv.org/2.4/modules/imgproc/doc/structural_analysis_and_shape_descriptors.html?highlight=matchshapes#matchshapes
OpenCv - is not easy stuff and therefore it will take some time from You to create algorithm and translate it to ahk.

[malcev]

Just found Autoit wrapper for this library
https://www.3delite.hu/Object%20Pascal%20Developer%20Resources/ImageRecognitionLibrary.html
https://www.autoitscript.com/forum/topi ... ccelerate/