A Novel Stage Wise Denoising Approach on Ancient Kannada script from Rock Images

Knowledge present in rocks is extincting due to degradation. So, the proposed work aims to binarize the historical ancient Kannada rock inscription from ancient temples about old slokas as well as mythological information’s in a readable format. The historical data are very precious so preserving such data is very important task. So proposed work makes the degraded rock inscriptions to readable format using the novel stage wise processing proceeded with smoothing, sharpening, noise removal, outlier detection, filling holes, background subtraction as well as thresholding. After thresholding will get a binarized output image which is more readable. The proposed research work has addressed some of the challenges like oil stains, rock erosion, algae, fungus and uneven illumination. Proposed model gives the highest accuracy of 95% compared to existing model like Otsu, Sauvola, Niblack, Adaptive Thersholding and Adaptive Gaussian Thersholding.