OpenCV Q&A Forum - RSS feedhttp://answers.opencv.org/questions/OpenCV answersenCopyright <a href="http://www.opencv.org">OpenCV foundation</a>, 2012-2018.Mon, 18 Mar 2019 17:38:56 -0500Are there common values of standard deviation for Gaussian noise of an image?http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/ For example, it occurs to me that there might be a standard deviation value of Gaussian noise in which the human eye could no longer distinguish an object because the standard deviation is very high and many edges were removed because of that amount of noise. Or I think maybe there are values of standard deviation in which the human eye can better distinguish an object in an image because the model of vision of the eye is modeled in such a way that these values of standard deviation allow the eye to recognize or distinguish an object. Is there any research about this that I am commenting on? Are there "important" values of Gaussian noise standard deviation in an image? Thanks in advance
Mon, 18 Mar 2019 00:53:08 -0500http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/Comment by Eduardo for <p>For example, it occurs to me that there might be a standard deviation value of Gaussian noise in which the human eye could no longer distinguish an object because the standard deviation is very high and many edges were removed because of that amount of noise. Or I think maybe there are values of standard deviation in which the human eye can better distinguish an object in an image because the model of vision of the eye is modeled in such a way that these values of standard deviation allow the eye to recognize or distinguish an object. Is there any research about this that I am commenting on? Are there "important" values of Gaussian noise standard deviation in an image? Thanks in advance</p>
http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/?comment=210461#post-id-210461You may want to look at the following topics:
- [SIFT](https://www.cs.ubc.ca/~lowe/papers/ijcv04.pdf)
- [The SIFT (Scale Invariant Feature Transform) Detector and Descriptor](https://courses.cs.washington.edu/courses/cse576/06sp/notes/Interest2.pdf)
- [scale space](http://www.cs.uu.nl/docs/vakken/ibv/reader/chapter9.pdf), [#2](https://people.kth.se/~tony/papers/Scale-Space-EncCompSci.pdf)Mon, 18 Mar 2019 16:32:18 -0500http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/?comment=210461#post-id-210461Answer by SRG-FTL for <p>For example, it occurs to me that there might be a standard deviation value of Gaussian noise in which the human eye could no longer distinguish an object because the standard deviation is very high and many edges were removed because of that amount of noise. Or I think maybe there are values of standard deviation in which the human eye can better distinguish an object in an image because the model of vision of the eye is modeled in such a way that these values of standard deviation allow the eye to recognize or distinguish an object. Is there any research about this that I am commenting on? Are there "important" values of Gaussian noise standard deviation in an image? Thanks in advance</p>
http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/?answer=210462#post-id-210462I will look in the links. ThanksMon, 18 Mar 2019 17:38:56 -0500http://answers.opencv.org/question/210429/are-there-common-values-of-standard-deviation-for-gaussian-noise-of-an-image/?answer=210462#post-id-210462