`wavedec2` is a function in MATLAB that performs a 2D wavelet decomposition of an image using a specified wavelet. It breaks down the image into multiple levels of approximation and detail subbands, allowing for a multi-resolution analysis of the image. This function takes the image as input along with the level of decomposition and the wavelet to be used.The output of `wavedec2` is a cell array containing the approximation coefficients and detail coefficients at each level of decomposition. These coefficients represent different frequency components of the image at various resolutions. By analyzing these coefficients, one can extract valuable information about the image, such as edges, textures, and patterns.Overall, `wavedec2` is a useful tool for signal processing, image analysis, and feature extraction. It provides a powerful method for decomposing and analyzing images in a multi-resolution framework, making it a valuable tool for a wide range of applications in image processing and computer vision.
