Spotting defects more clearly: radiographic image enhancement

Radiographic image enhancement techniques like contrast limited histogram equalization (CLAHE) and adaptive wavelet thresholding enhance the perception of defects better than other commonly used techniques. Contrast enhancement improves the quality of radiographic images that usually have poor contrast. CLAHE technique helps in the improvement of local contrast of the radiographic images and reduces the noise produced in homogeneous areas. The adaptive wavelet thresholding technique removes image noise while maintaining the sharpness of defects.