287results about How to "Accuracy adjustable" patented technology

There is provided a matching method, capable of positioning with higher accuracy at higher speed. The method includes the steps of: constructing a pattern model of a registered image in which a plurality of reference points are set on an extracted contour and a corresponding point search line having a predetermined length and passing through each reference point; acquiring an image and acquiring an initial position corresponding to the registered image to arrange the corresponding point search line of the pattern model; finding a corresponding point on the image corresponding to each reference point with regard to each corresponding point search line at a position along the corresponding point search line on the image; and regarding a relation between each reference point and the corresponding point as an evaluation value and performing fine positioning such that an accumulated value of the evaluation values becomes minimal or maximal.

The invention discloses a network text data detection method based on fuzzy cluster. The method comprises the following steps: firstly preconditioning the extracted network content; extracting features of preconditioned network content which is needed to cluster, clustering, setting initial clustering number, wherein during the clustering process, a clustering number is matched with a membership matrix, each membership matrix contains an average information entropy, the average information entropy selects initial clustering center according to density function, the clustering number is modified in algorithm iteration process, and when the average information entropy is the minimum value, the corresponding clustering number is an optimal clustering number; and finally returning the clustering result to the user. The invention has efficient intelligent clustering effect and can adjust the clustering precision while considering the clustering speed according to different applications.

The invention discloses a real-time measurement device for dynamic positions and poses. The real-time measurement device for the dynamic positions and poses can be applied to real-time accurate position and pose measurement of a to-be-measured object in a dynamic environment and comprises a datum emission and transmission system, a dual-screen laser imaging system, a binocular visual inspection system and a data processing system, wherein the datum emission and transmission system provides three-dimensional angle datum for position and pose measurement by utilizing cross-line laser and a distance between a measured object and the measurement datum is obtained through combination with a distance measurement function; the dual-screen laser imaging system receives the cross-line laser and performs imaging on receiving screens; the binocular visual inspection system shoots cross-line laser images on the two receiving screens in real time and extracts position information of the cross-line laser center under the image coordinate system and an included angle between the cross horizontal line and a horizontal axis of the image coordinate system; the data processing system comprehensively processes data information of each system and calculates real-time positions and poses of the measured object relative to the measurement datum. The real-time measurement device is high in measurement precision, adjustable in measuring range and precision and suitable for measuring object positions and poses in a vibration environment.

The value of the pixel at the same position of each of the training input image as well as a plurality of training feature images is inputted into the discrimination device, which learns in such a way as to reduce the error between the output value obtained from the discrimination device and the value of the pixel at the aforementioned pixel position in the training output image. At the time of enhancement processing, the feature image is produced from the image to be processed, and the values of the pixels of these images at the same position are inputted into the discrimination device, thereby outputting the enhanced image wherein the value outputted from this discrimination device is set as the value of the pixel at the aforementioned pixel position.

A liquid crystal display is provided with: a tap adjustment register for adjusting a gray scale level to a gray scale voltage in intermediate portions close to the end portions of the gamma characteristic; and a partial-voltage-ratio adjustment register for adjusting a ratio of a gray scale voltage among a plurality of gray scale levels in the intermediate portions close to the end portions of the gamma characteristic, in addition to an amplitude adjustment register for adjusting an amplitude of a gamma characteristic which determines a relation between gray scale levels and gray scale voltages or brightness levels on a display panel; a gradient adjustment register for adjusting a gradient of intermediate portions of the gamma characteristic while fixing end portions of the gamma characteristic; and a fine adjustment register for finely adjusting the intermediate portions of the gamma characteristic for each gray scale level.

There is provided a matching method, capable of positioning with higher accuracy at higher speed. The method includes the steps of: constructing a pattern model of a registered image in which a plurality of reference points are set on an extracted contour and a corresponding point search line having a predetermined length and passing through each reference point; acquiring an image and acquiring an initial position corresponding to the registered image to arrange the corresponding point search line of the pattern model; finding a corresponding point on the image corresponding to each reference point with regard to each corresponding point search line at a position along the corresponding point search line on the image; and regarding a relation between each reference point and the corresponding point as an evaluation value and performing fine positioning such that an accumulated value of the evaluation values becomes minimal or maximal.

The present invention provides a time-to-digital converter which comprises the following components: a coarse detecting circuit, an interface circuit and a fine detecting circuit, wherein the coarse detecting circuit finally realizes time-to-digital convection in a large input range by means of counter through designing a delay line to an annular member and multiplexing a judging unit as a delaying unit. The interface circuit is used for transmitting a time allowance which is generated by the coarse detecting circuit to the fine detecting circuit. The fine detecting circuit realizes high-precision time-to-digital convection with adjustable precision through adjusting a gate oxide capacitor of a field effect transistor and fixing the frequency difference between two oscillators in a differential annular oscillator to a fixed small value. Overall, through the three modules, the time-to-digital converter of the invention can perform high-precision large-range convection on the time interval through a relatively small area expenditure.

This invention discloses a digital locking indictor, comprising a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. This invention further discloses a phase lock loop frequency synthesizer, comprising a phase detection discriminator, a charge pump, a loop filer, a voltage-controlled oscillator, a frequency divider and a digital locking indictor, which are sequentially connected. The digital locking indictor comprises a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. This invention further discloses a wireless transceiver, comprising a phase lock loop frequency synthesizer. The phase lock loop frequency synthesizer comprises a digital locking indicator. The digital locking indicator comprises a joint gate, a delay circuit, a trigger set, a selector and a controller, which are sequentially connected. The precision of the locking indicator can be adjusted by using this invention; the influence due to the current leaked by the charge pump can be effectively conquered because the locking indicator is insensitive to the reference frequency. And the phenomenon of wrong locking indication caused by cycle slip can be eliminated.

With a printing apparatus and a head driving method according to the present invention, a plurality of printing heads having a plurality of recording elements and a printing medium are relatively moved in a prescribed direction, and the plurality of recording elements of each printing head are divided into a plurality of blocks and each element in each block are driven in a prescribed sequence during the relative movement. As a print position offset between the plurality of printing heads in the prescribed direction on the printing medium is detected and the detected amount is greater than a prescribed amount, on the basis of block sequence designater, an in-block driving sequence is set independently for the each printing head and on the basis of a sequence generated by block sequence generater, the each printing head is driven. Correcting the print position offset in this way produces accuracy of printing position adjustment between printing heads in the main scanning direction, and thereby correcting a registration offset with accuracy can achieve a high quality image.

The invention relates to a test method of a high-precision dynamic comparator. The method is characterized by: firstly, through a clock control SR latch, determining an output state of the comparator and inputting a determined output signal into a unity gain amplifier; secondly, providing a second order integrator and providing a feedback voltage for the comparator after positive integration or backward integration is performed to positive and negative of the signal which passes through a buffer and is output by the unity gain amplifier. Besides, the invention provides a test circuit which can realize the above method. In the invention, through one simulation to the dynamic comparator, an input offset voltage can be obtained. Test precision can be controlled by human beings. Rapidity and accurate adjustability of the test can be realized.

The invention relates to a method for positioning and segmenting heart sound signal and a device. The device comprises a preprocessing unit, an initial state determination unit, a calculation unit, afirst search unit, a second search unit and a segmentation unit, wherein the preprocessing unit comprises a filter functional module which is used for preprocessing the heart sound signal and filtering noise out of band; the initial state determination unit is used for determining a start cycle, the maximum cycle and an initial point; the calculation unit is used for calculating correlation coefficient of signals in two adjacent calculation cycles; the first search unit is used for searching correlation coefficient extremum 1 in the correlation coefficient; the second search unit is used for search correlation coefficient extremum 2 in the correlation coefficient extremum 1; and the segmentation unit is used for segmenting the heart sound signal. In the invention, the method for positioning and segmenting the heart sound signal and the device use a self-correlated coefficient method to position automatically and accurately.

The invention provides a phase shifter for a three-phase voltage and a method for phase shifting of the three-phase voltage. The phase shifter for the three-phase voltage comprises a three-phase isolation transformer, a voltage regulator and a compensation transformer, wherein the first connection end of the three-phase isolation transformer is connected to the compensation transformer, and the second connection end of the three-phase isolation transformer is connected to the first connection end of the voltage regulator, the three-phase isolation transformer is used for regulating the phase position of the voltage of the compensation transformer according to the ratio of transformation of the voltage regulator, the second connection end of the voltage regulator is connected to the compensation transformer, the voltage regulator is used for regulating the amplitude of the voltage of the compensation transformer according to the ratio of transformation of the voltage regulator, the auxiliary side of the compensation transformer is connected to a three-phase live wire of a three-phase power supply in series, and the compensation transformer is used for series connection and superposition of the voltage, with the phase position and the amplitude regulated, of the compensation transformer and the voltage of the three-phase voltage. By the adoption of the phase shifter for the three-phase voltage and the method for phase shifting of the three-phase voltage, the problem that according to relevant techniques, application requirements can not be met through a transformer type phase shifter is solved, and the requirements of different application scenarios can be met.