Remove noise from image
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I have this image and when I'm trying to generate it into the 3D surface it appears some noises in the graph.
Can anyone help me with some noise removal suggestion?
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Akira Agata
2020-8-10
How about applying median filter?
The following is an example:
% Read the image and convert it to grya-scale
I = imread('gray.png');
Igray = rgb2gray(I);
% Apply median filter to the image
Igray2 = medfilt2(Igray,[7 7]);
% Show the result
figure
imshowpair(Igray,Igray2,'montage')
7 个评论
agung pratama
2020-8-12
Akira Agata
2020-8-13
It represents the size of the median filter.
When setting [n m], medfilt calculates median value in the m-by-n neighborhood around the corresponding pixel in the input image.
For more details, please reffer to the documentation page.
FYI:
In addition, you can find some other noise removal techniques in the documentation page.
agung pratama
2020-8-14
I get this when i create the 3D surface of the image
How i can get the x,y,z value in mm?
Akira Agata
2020-8-15
To obtain the x,y,z value in mm, we need to know "pixels per mm" value for x,y,z.
So, if possible, could you provide these values?
agung pratama
2020-8-15
编辑：agung pratama
2020-8-15
Im using a 270 ppi and 48 mp camera but i cut the original image, does it matter? this the image properties
Image Analyst
2020-8-15
That's not enough. That gives you the field of view in pixels, but not in microns or mm. By the way, a 1154 x 1152 image is 1.3 megapixels, far from 48 megapixels - not even close.
agung pratama
2020-8-15
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