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A new method based on the YCbCr channel information is proposed for image demosaicing. The method includes three steps. The first step follows the convenient approach to calculate the candidates of estimators for the missing pixels. The second step employs a novel soft-decision method to determine the proper estimators. The final step finalizes the demosaicing result with a novel filter to reduce...
This work introduces a cost-effective method to increase the uniformity of indoor color light emitting diode (LED) panels based on the application of simple image processing algorithms. Suppose the brightness of LED dots in the panel is controlled by the parameters such as pixel values, pixel gains and total gain. Using a commercial web camera to capture the brightness of the LED panel, the system...
In this paper we construct a projector system that is composed of a 2×2 projector array. The projection screen under consideration is not planar but with curvature characterized by a hyperbolic equation with known parameters. This setting integrates the existing applications which consider only the one-dimensional projector array or only the planar screen. The associated techniques including two-dimensional...
In this paper we construct a long-distance VGA signal extending system featuring the self-tuning capability. The physical carrier of the signal is the typical local area network (LAN) cables such as CAT-5e. By investigating the noise distributions over the carrier a video restoration algorithm is proposed. The algorithm calculates the associated statistics and identifies the optimal IC control parameters...
In this paper we propose to implement image warping by two projectors. The screen that the images are projected onto is assumed to be the lateral surface of a cylindroid with known lengths of major and minor axes. A blending function that smooths the overlapped projection area is used. The geometric correction model for the convex type of surface is derived. In particular, the model is presented in...
In this paper we study the implementation of correcting projection distortion due to the curved display. The studied display is the lateral surface of a cylindroid with known parameters. Firstly we introduce the mapping function by which the image is pre-processed before it is projected. We then reconsider the formula in the hardware calculation point of view and develop an algorithm that can be executed...
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