Info
此问题已关闭。 请重新打开它进行编辑或回答。
tthis right way to find
1 次查看(过去 30 天)
显示 更早的评论
a=sqrt(0.5)*randn(400)
snr=1/0.5 %0.5 is variance and signal=1 consider as normalized
snrdb=10*log(snr)
is this right way to find actual snr wnen i add 'a' marix as noise in a original image.(becuase i needs to add different variance noise in original images and comparing result)
0 个评论
回答(1 个)
Matt J
2012-12-28
编辑:Matt J
2012-12-28
It's the right way assuming the "original image" satisfies signal=1, however it is that you're measuring that.
4 个评论
Image Analyst
2012-12-28
For background, Matt, he has asked essentially this same question 14 times (yes, fourteen) times this month as separate postings - how to get the signal-to-noise ratio when you don't know the signal and you don't know the noise, all you know is the actual noisy signal and sometimes what specific SNR you want. See his profile.
Matt J
2012-12-28
Yes, I've seen the similarity in his questions. Wasn't sure they were identical, though.
此问题已关闭。
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!