Read in image file and convert into binary file with and without treshold value of your selection ?

I need an answe !!!!

Answer 1

[Image Analyst]

To create a binary image from an integer or floating point image, threshold like this:

binaryImage = yourImage < thresholdValue;  % Can use >, >=, or other operators also.

[engineer 01]

Thank you so much , but how can i create binary image from Integer or float point ??

[Image Analyst]

I just showed you in the line of code above.

[engineer 01]

i wrote

im=imread('d:\\photo.jpg'); binaryImage = im < 1; imshow(im); figure; imshow(binaryimage);

where is wrong? i didnt find

[Walter Roberson]

Perhaps the image was RGB? If so then

   binaryimage = rgb2gray(im) < 1;

[Image Analyst]

Perhaps im has no 0's in it, so the entire binary image is false (black) because the criteria that im is less than 1 is never met.

Answer 2

[Walter Roberson]

Almost all image files are already binary files. About the only ones that are not are PBM and PPM files.

[engineer 01]

So,how can i Apply treshold ??