Histogram Equalization of Grayscale Images
Grayscale image histogram equalization; Gradient enhancement; Histogram specification; Grayscale image histogram data; Direct grayscale transformation: Contrast enhancement techniques
Fusion of Two Grayscale Images Using Wavelet Transform
Fusion of two grayscale images using wavelet transform: Perform 2-level decomposition on image 1 with sym4 wavelet function, then process decomposition coefficients for fusion by emphasizing contours and suppressing details. Apply 2-level decomposition with sym4 wavelet to image 2. Finally, fuse images in wavelet transform domain and reconstruct fused coefficients. Implementation involves wavelet decomposition, coefficient processing, and inverse wavelet transform.
Two-Level Wavelet Decomposition of Grayscale and Binary Images for Digital Watermarking
Implementation of a digital watermarking program that embeds decomposed binary image data into the detail subbands of grayscale images using two-level wavelet decomposition