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The accuracy of star centroid extraction and identified star number is both crucial features for star sensor precision. Motion blur and fracture are introduced when star sensor works under high dynamic conditions, which affect the accuracy of star centroid extraction and further reduce the precision of the star sensor. To improve the precision of star sensor, this paper proposes a star image restoration...
Motion parameters estimation is a crucial key to blur star restoration which is helpful to improve dynamic performance of star sensor. However, motion blur under high dynamic conditions results in signal-to-noise ratio (SNR) decreasing seriously which brings about difficulties in motion parameters estimation. In our paper, an improved Radon transform by introducing a combination of Z-function and...
A new intra coding method based on one dimensional line prediction with one dimensional transform is presented. The H.264/AVC design includes a multidirectional spatial prediction method to reduce spatial redundancy by using neighboring samples as a prediction for all the samples in a block of data to be encoded. In the proposed intra coding method, the spatial prediction is performed based on line...
Rate control algorithm is of great importance to video coding. Many existing schemes are based on the quadratic rate control scheme. The proposed method introduces a novel rate control algorithm with adaptive rounding offset, aiming at achieving bit-rate optimization and adaptation of the content of the video sequences. The rounding offset is chosen adaptively based on the minimum blocks' discontinuities...
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