Abstract: A method for corresponding, evolving and tracking feature points in a three-dimensional space performs corresponding, evolving and tracking on the features points after transferring the two-dimensional feature point information in an image information into a corresponding state in the three-dimensional space. A recursion is employed to continuously update the states of the feature points in the three-dimensional space and evaluate the stability of the feature points by evolving. Hence, the obtained three-dimensional feature point information has a stronger corresponding relationship than the feature point information conventionally generated on the basis of the two-dimensional feature point information. As a result, a more precise three-dimensional scene can then be constructed.

Abstract: The present invention discloses a transmission device for agitator of impression material, wherein belt pulleys are installed on the V-frame of the agitator of impression material and the fixing pole of a motor; complementary rollers are also installed on the V-frame, and belts wrap over those belt pulleys, those complementary rollers, and an annular trench on the perimeter of the containing cup. When the containing basin on the V-frame is driven to rotate by the motor of the agitator of impression material, the containing cup is driven to rotate opposite the rotating direction of the containing basin via the interlinked actuation of the aforementioned belts, belt pulleys, and complementary rollers, so that the impression material can be evenly mixed by the high-speed rotation and can be densified by the centrifugal force and the air bulbs inside the impression material can be eliminated.

Abstract: A transcoder for transcoding digital video signals includes a decoder and an encoder. In the decoder, an end-of-block (EOB) position of an incoming block received by the decoder is determined and a discrete cosine transform (DCT) block type is determined based on the determined EOB position. A reduced number of DCT coefficients is computed in a subsequent inverse DCT computation based on the DCT block type. In the encoder, if the incoming block is intercoded, no DCT coefficients are computed after the EOB of the incoming blocks is performing a DCT. Further, in the encoder when the incoming block is intercoded, an algorithm is applied to predict which DCT coefficients may become zero after a subsequent quantization operation, and only DCT coefficients that may not become zero are computed in performing the DCT.

Abstract: An optical curing apparatus consists of a body, a gun and control circuits located in the body and the gun to solidify dental resin filling in the decayed teeth in the shortest time so that the dental resin will be filled in the teeth firmly and repeated teeth decay may be avoided. The control circuits may control light projecting time period and adjust optical output power, and detect if optical power output is normal. When the optical output power is below a preset standard value, the apparatus will generate an alert to notify users to replace the lamp set in the curing apparatus.

Abstract: A transcoder for transcoding digital video signals includes a decoder and an encoder. In the decoder, an end-of-block (EOB) position of an incoming block received by the decoder is determined and a discrete cosine transform (DCT) block type is determined based on the determined EOB position. A reduced number of DCT coefficients is computed in a subsequent inverse DCT computation based on the DCT block type. In the encoder, if the incoming block is interceded, no DCT coefficients are computed after the EOB of the incoming blocks is performing a DCT. Further, in the encoder when the incoming block is intercoded, an algorithm is applied to predict which DCT coefficients may become zero after a subsequent quantization operation, and only DCT coefficients that may not become zero are computed in performing the DCT.