how to find spatial frequency of color image

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mohammad shafi bhatt
mohammad shafi bhatt 2013년 10월 17일
댓글: Image Analyst 2013년 11월 10일
i have fused two images and now i want to find the spatial frequency of fused image can anyone please help

답변 (2개)

Image Analyst
Image Analyst 2013년 11월 6일
You can calculate the 2D FFT of an image. The image must be a 2D image, not a 3D color image. So you can convert that to gray scale using rgb2gray(), or you can use the red, green, or blue channel, or you can convert to another colorspace such as lab or hsv (using rgb2hsv() function) and then do the FFT of the h, s, or v channel. It all depends on what you want to do with the information once you get it.
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mohammad shafi bhatt
mohammad shafi bhatt 2013년 11월 10일
CAN U PLEASE SEND ME THE CODE FOR FINDING SPATIAL FREQUENCY AND FUSION MUTUAL INFORMATION OF IMAGE PLZ ITZ URGENT THANKS WITH GREAT REGARDS
Image Analyst
Image Analyst 2013년 11월 10일
I said you can use fft2() to get the spatial frequencies. I don't know what "fusion mutual information" is.

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Jan
Jan 2013년 11월 6일
You probably want to analyze the structure of the image's 2d fourier transform using fft2(). Either for each channel or after conversion to a gray image.
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mohammad shafi bhatt
mohammad shafi bhatt 2013년 11월 6일
actually i have to calculate for each channel

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