Questions tagged [blur]
The blur tag has no usage guidance.
7
questions
24
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3answers
69k views
Gaussian Blur - Standard Deviation, Radius and Kernel Size
I've implemented a gaussian blur fragment shader in GLSL. I understand the main concepts behind all of it: convolution, separation of x and y using linearity, multiple passes to increase radius...
I ...
5
votes
2answers
3k views
How to approximate gaussian kernel for image blur
From wiki, a $3 \times3$ gaussian kernel is approximated as:
$$\frac{1}{16}\begin{bmatrix}1&2&1\\2&4&2\\1&2&1 \end{bmatrix}.$$
Applying this kernel in an image equals to ...
4
votes
1answer
2k views
Blurring Non-Uniform Areas
I have an image with arbitrary area (the boundary is shown in gray):
I would like to blur just the image within boundaries.
Ordinary blur causes the background proliferating to image and vice versa. ...
23
votes
3answers
15k views
How do I remove motion blur?
Is there a generically accepted method of removing motion blur from an image. For a simple case, we can assume that motion happens in a straight line. I assume that it's a two part process composed of ...
10
votes
2answers
5k views
Isolate the non blurred part of foucsed image
I have an image taken by a mobile phone camera with focus on a part of it let say a face or whatever.
I want to know -approximately- where is the focused area. For example, a bounding box around the ...
5
votes
2answers
14k views
Gaussian Blur In MATLAB and Connection to Image Resolution
I am calling fspecial() in MATLAB to create a Guassian blur of an image.
For example,
...
1
vote
2answers
12k views
How to Calculate Gaussian Kernel for a Small Support Size?
How to calculate the values of Gaussian kernel? I think I understand the principle of it weighting the center pixel as the means, and those around it according to the $\sigma$ but what would each ...
