How to find different types of objects in the image?

Dear friends, I've to find different types of objects in the images, by comparing two images, which is best algorithm please reply with examples,

Answer 1

[Image Analyst]

The whole field of image processing/image analysis is just for answering that question. There are millions of algorithms depending on what you want to find. Go here to browse them: http://www.visionbib.com/bibliography/contents.html Pick one and code it up. Maybe you can simply subtract the images - I don't know.

Remember the FAQ: http://matlab.wikia.com/wiki/FAQ#Can_you_program_up_the_algorithm_in_this_article_for_me_and_explain_it_to_me.3F

You've asked an extraordinarily general question. If you want specific help, post your images and then read this: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[Somashekhar Betageri]

Dear Image Analyst, for my project i've to find the different types of weeds(Un wanted Plants) in the plants, here i'm attaching photo,

</matlabcentral/answers/uploaded_files/25960/Picture4%20-%20Copy.jpg> Here in this image i've marked Plant and Un wanted Plant, and my aim is to make database of unwanted plants in PC, after that when i took field image that should be compared with the database image if there is match in the image that should be known by alert message...

[Image Analyst]

I think you're taking on too challenging a project for a novice image processing person. Why don't you tackle something easier?