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Near-infrared gray images captured together with visible color images have recently proven useful for image enhancement and restoration. This paper introduces a new coloring method for adding colors to near-infrared gray images via a contrast-preserving mapping model. A naive coloring method directly adds the colors from the visible color image to the near-infrared gray image; however, this method...
In this paper, we develop an improved method for discrete tangent estimation based on Digital Straight Lines and Segments (DSL and DSS for short). We also compare it with an existent method proposed by Vialard. The experimental results show that the new method has an overall good performance.
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