Weighted Median Filtering for Ultrasound Image Enhancement

Weighted median filtering is an advanced image enhancement technique particularly effective for denoising ultrasound images while maintaining diagnostic quality. This method can be extended to various image processing applications beyond medical imaging. The implementation typically involves calculating weighted median values within a sliding window, where each pixel's contribution is adjusted based on its statistical significance or spatial relationship to neighbors. Additionally, this document includes methods for calculating signal-to-noise ratio (SNR), a critical metric for evaluating image quality. The SNR calculation can be implemented using variance analysis between signal and noise components, often computed through regional intensity comparisons. By combining weighted median filtering with SNR assessment, practitioners can significantly enhance image clarity and quality, addressing diverse requirements in image processing workflows including edge preservation and texture enhancement capabilities.