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This paper presents a method of video shot motion analysis based on LK optical flow method to solve the problem of film video shot motion of visual comfortable effect. A segmentation method based on footage of two class support vector machine classification is used. The optical flow method based on the hierarchical Lucas-Kanade in Pyramid combined with SLAM Algorithm to extract the motion information...
This paper presents a miniature autofocus (AF) voice coil motor (VCM) actuator with retaining force in a restricted space that can be applied in an optical AF apparatus. A position encoder consisting of a permanent magnet (PM) and a Hall-effect sensor is used to detect magnetic signals; the displacement of the AF VCM actuator can be obtained from the encoder, thus enabling closed-loop control. The...
Adaptive channel estimation methods are proposed for reduced guard-interval (RGI) CO-OFDM. Channel estimation is updated adaptively after decoding a sequence of OFDM symbols using LS or MMSE decision-feedback from demodulator to channel estimator.
The coupled-cavity VCSEL under digital modulation can be configured to perform different functionalities for data communications. 10 Gb/s pulse amplitude modulation up to 4 levels, and 34 ps optical pulse generation are demonstrated in this work.
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