how can convert image to binary image without threshold matlab ?

how can convert image to binary image without threshold matlab ?

[Walter Roberson]

Under what conditions do you want 0 to be generated, and what conditions for 1 ?

Answer 1

[Image Analyst]

binaryImage = logical(yourImage);

yourImage must be an integer (of any type), single, or double array of only 0's and 1's. Any other values (other than 0 or 1) will involve thresholding to make them true or false.

[engineer 01]

it didn't work.. how can i use binaryImage = logical(yourImage) ? Please, Can you write exact code ?

[Image Analyst]

That IS my exact code...and it works. Yours is the code that doesn't work according to your own statement, so doesn't it make sense that it should be you that posts the code that doesn't work?

[engineer 01]

thank you so much, but when i write

I = imread('d:\\photo.jpg'); binaryImage = logical(I); imshow(binaryimage);

then give an error

[Image Analyst]

Well, what is the error?

Anyway, if you read my answer you'd see that it is valid only for images comprised of only 1's and 0's. You probably don't have that. You cannot convert your image into a binary image without thresholding.

[Sean de Wolski]

Well it's basically an "anything but 0" threshold :)