how to conver image matrix into bipolar values

hi

im fairly new to matlab no idea what im doing

i have set of images that i have to convert into bipolar values, and all i can find is binary

i also tried hardlims() but it turns the matrix into 1s only

ALSO

how do i upload all the images at once?

i can only do it one at a time

[DGM]

What exactly do you mean by converting images into bipolar values?

Answer 1

[KALYAN ACHARJYA]

Bipolar Values, considering two data value only (Same number with Positive & Negative)

bw_image=%Convert to binary image
image_data=double(bw_image);
image_data(image_data==0)=-1;

In the resultant image, there are only two pixels elements +1 and -1

or Are you looking for more data type?

https://blogs.mathworks.com/steve/2013/01/15/data-types/