数字图像 Resources

Showing items tagged with "数字图像"

Fourier Transform of digital images featuring the original image after rotation and translation, along with its corresponding frequency spectrum represented in three-dimensional coordinates. Implementation typically involves 2D FFT algorithms and visualization techniques.

MATLAB 223 views Tagged

Techniques covered include: Display of digital image matrix data and its Fourier transform, image compression using 2D discrete cosine transform, contrast enhancement through grayscale transformation methods, histogram equalization. Simulation of Gaussian white noise and salt-and-pepper noise effects on images, filtering salt-and-pepper noise using MATLAB's medfilt2 function for 2D median filtering, mean filtering of noisy images using filter2 function, adaptive Wiener filtering for images, image sharpening using five different gradient enhancement methods, high-pass filtering and mask processing techniques, smoothing noisy images with Butterworth low-pass filters, and image sharpening using Butterworth high-pass filters.

MATLAB 193 views Tagged