how can i convert a number of grayscale images into binary images

respected sir, i am new to matlab please help me to convert a number of grayscale image into binary image, i had use im2bw command but it does not gives result, please help me sir, i am having image of about 3000 please help me to convert those images into binary thanks in advance.

[Stephen23]

Everything stored on your computer is stored as binary information, including all of those images. What exactly do you mean by a "binary image"?

[Image Analyst]

In image processing, a binary image is a logical image with values of true or false. Usually used to indicate a mask where you want to do processing inside.

Answer 1

[Image Analyst]

I'm not surprised at all. I assume you used graythresh() to get the value to pass in to im2bw(). In my experience, most real world images can't be thresholded satisfactorily using the Otsu method. You'll have to come up with an algorithm that is better suited to your particular images.

To process a folder of 3000 files, see the FAQ for code examples:

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F