Difference between calculating psnr in uint8 and double.
조회 수: 3 (최근 30일)
이전 댓글 표시
I have implemented a data hiding algorithm(multilevel histogram modification and sequential recovery).I am getting psnr about 30 if calculated with respect to images in double and 10 psnr if calculated with uint8. Should I proceed with psnr in double or not?
댓글 수: 0
답변 (2개)
KSSV
2017년 1월 27일
uint8 is used unsigned 8 bit integer. It is easy to convert double to uint8 or otherway.
let say I have matrix of uin8 A.
then to convert it to double use:
A = double(A);
and to convert it back to uint8 use:
A = uint8(A);
댓글 수: 0
Walter Roberson
2017년 1월 27일
Psnr involves subtraction. But if you subtract a larger uint8 from a smaller you get 0 rather than a negative number. That makes it look like the locations were the same when they are not.
댓글 수: 0
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!