matlab image processing (gray level )

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hodahussein

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dear all

i have an image 8bit (gray scale) and i want to convert it to 4 bit gray scale also
using matlab

wait your reply for importance

regards
 

Hi,
Matlab does not give permission for jpg images to be 4 bit. You can use imwrite(image,'name','BitDepth','4') command for .png , .gif etc. type. But if u read your saved image Matlab automatically assigns uint8 class to your gray scale image. Instead of this you can use logarithmic or power-law transformation to your 8 bit image to compress values within 4 bit range.

Regards,
Alper USLU
 

@alperuslu, u seems to be an expert in matlab ...if u can , plz provide me the code for sobel edge detection with matlab ..thanks in advance
 

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