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Jim

what is the difference between high pass and high boost filter

Asked by Jim
on 15 May 2012

Hi,

Can anybody tell me what is the difference between high pass and high boost filter?

Thanks in advance

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2 Answers

Answer by Wayne King
on 15 May 2012

Hi Jim, normally what I have seen referred to as a high boost filter is when you take an image and possibly amplify it, then subtract from the amplified image a blurred (lowpass filtered) version of the image.

It is an image sharpening technique.

High pass filtering is when you simply apply a highpass filter to your image. A filter like this one for example:

   b = [
      0.2333   -0.4040    0.1083    0.0625
     -0.4040    0.6998   -0.1875   -0.1083
      0.1083   -0.1875    0.0502    0.0290
      0.0625   -0.1083    0.0290    0.0167];
   freqz(b)

  1 Comment

Jim
on 15 May 2012

Does the high boost filter removes blurrness from the image

I have a blurred image

You can see the image in the link below:
http://blur3232.blogspot.se/

Can I apply high boost filter to remove blurness from the image


Answer by Sritej gunta
on 29 Mar 2013

the high boost filter amplifies the high frequency components and it keeps the low frequency components intact(almost).

it also enhances the edges and removes the blurred parts

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