MATLAB: How to convert image to 32-bit-data

Question

Hi I use Matlab to convert image to hex ，I can get the fig 1（8 bit data）however ，I can't genetate the data like fig2（32 bit data） . Can you please give me some advises on how to deal with it or give me a example.

fig 2

fig 1

Answer 1

Thanks .perhaps it's a wrong direction.I should modify my program rather than entangled in convert image to he by Matlab