Ask Your Question
0

Which filter should be applied on different type of noise image?

asked 2016-08-16 05:51:46 -0600

snehal gravatar image

updated 2016-08-16 07:30:11 -0600

Hello

As The filter is used to remove the noise. There are many filters like

  1. Homogeneous filter
  2. Gaussian filter
  3. Median Filter
  4. Bilateral Filter etc.

and also different types of noise are present in Different images . I am in the confusion that which filter i should used and when to use which filter ? Please can anyone suggest me Which filter is used to remove which type of noise in the real scenario.

edit retag flag offensive close merge delete

Comments

1

Ow that is a very wide question, mainly because the noise reduction filter applied depends on the application and the noise generated within. Predetermining what filter to use without knowing the exact scenario is kind of impossible. Could you shed some more light on what you trying to achieve?

StevenPuttemans gravatar imageStevenPuttemans ( 2016-08-16 07:31:37 -0600 )edit

1 answer

Sort by ยป oldest newest most voted
1

answered 2016-08-26 11:55:54 -0600

pklab gravatar image

I quote @StevenPuttemans

that is a very wide question...

but I can get some general directions

If the noise level is almost random (with mean ~=0 and stdev=~sigma) you can use Gaussian Filter or Mean (box) Filter. This is a common case due to termal or gain or long exposure noise... more in general white noise. This noise don't depend from signal frequency (image variations). On edge and textures Gaussian Filter works better than Mean Filter.

I don't understand exactly what you mean for Homogeneous filter, you might look at homogeneous area (similar frequency) and apply different Gaussian with appropriate sigma... this is the case of edge preserving filter like bilateral is.

Median filter is useful with salt-and-pepper noise, for example if you have some broken pixel or any random pixel replacement.

edit flag offensive delete link more

Question Tools

1 follower

Stats

Asked: 2016-08-16 05:51:46 -0600

Seen: 205 times

Last updated: Aug 26 '16