Contour Detection and Recovery through Bio-Medical Watermarking for Telediagnosis
Koushik Pal, V. H. Mankar, T. S. Das, Subir Kumar Sarkar · International journal of tomography and simulation · 2010
The current paper presents a medical watermarking method through contour detection and recovery for the authenticity of bio-medical images, which uses the region growing algorithm and human visual system (HVS). The proposed scheme makes the use of neighbourhood region for converting non-specific discontinuous region into specific continuous contour data. This contour as a fragile watermark is embedded in the perceptually insignificant, spatially selected detail coefficients using sub band adaptive threshold scheme along with the EPR as a robust one. Here, a new type of non-oblivious detection method is also proposed. The improvement in performance is supported through experimental results. The reported result shows improvement in visual and statistical invisibility of the hidden data. Moreover, this algorithmic architecture utilizes the existing allocated bandwidth in the data transmission channel in a more efficient manner.