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In this study, a video enhancement method based on high dynamic range processing was proposed. This method can enhance images that have backlighting problems and are underexposed or overexposed to improve visibility. The proposed method comprises pre-processing, illumination judgment, tone mapping, and color restoration. Initially, a small segment of an image is used to calculate an average luminance...
In this paper, we propose a lossless data hiding based on smart boundary adjustment approach. More specifically, by preserving either the minimum or the maximum pixel values of the blocks, data bits can be effectively embedded into the blocks without any occurrence of overflow and underflow. Experiments confirm that perceived quality is good and the payload is large while our peak signal-to-noise...
A simple and effective lossless data hiding algorithm is presented. Based on integer wavelet transform (IWT), a secret message is embedded in the three high subbands of IWT domain by the proposed coefficient-bias algorithm. More specifically, to provide a higher hidden space without severe distortion, only the coefficients of each block that located in a predetermined interval are utilized to hide...
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