Hi,
To my understanding, you want to open a .bim format file in MATLAB.
This comment answers how to open the .bim format file https://in.mathworks.com/matlabcentral/answers/1934105-i-am-trying-to-read-a-image-file-of-format-result-int-that-is-integer-image-file-not-able-to-open-wi#comment_2801333
It explains that doing
fid = fopen('result1.bim', 'r', 'ieee-le');
data = fread(fid, inf, '*float');
fclose(fid);
data = reshape(data,128,128);
imagesc(data)
would achive the same. Please refer to the comment for more detail explanantion.
Hope it helps!