Abstract
This work focuses on image enhancement technology for Polymer-Dispersed Liquid Crystals (PDLC) in a transparent display. The visible image in transparent displays is constituted by the output image and backgrounds, so there are some disadvantages, such as the unsaturated colors and low resolution. Generally, simple images can directly enhance contrast adjustment, but complex images will be distorted and abnormal. In order to conquer these challenges, dark channel prior is employed to sharpen the image, and is combined with Guided Filtering to improve the quality of the parameter that is estimated from the dark channel prior. However, these processes will lead to a reduced total grayscale value, which will decrease the image resolution in low grayscale. We therefore introduce an algorithm that is able to the low grayscale parts independently to resolve the problem. We keep the other higher grayscale parts unchanged so that we can get the sharpened image. The image enhancement technology can adapt to the perturbation in the transparent display, making the result more like the original image.
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