How to Combine Low and High Frequencies of Two Images in MATLAB?

1. What are high frequency and low frequency components in an image?
2. How to convert image from spatial domain to frequency domain in Matlab?
3. What is high frequency in image processing?

What are high frequency and low frequency components in an image?

We combine the two and make them promote each other. The high frequency component of the image represents the edge part and the low frequency represents the body part. Based on this assumption, we use Fourier transform to obtain the high and low frequency component from images.

How to convert image from spatial domain to frequency domain in Matlab?

F=fft2(grayImage); S=fftshift(log(1+abs(F))); W = wiener2(S); % filter a gray image by 3x3 neighbourhood in freq domain.

What is high frequency in image processing?

The high frequency image is obtained by subtracting the low frequency convolution from the original image. The high frequency image is shifted to account for negative values that result from the subtraction. There is one parameter available to customize the formation of the hybrid images.