43results about How to "Zoom in fast" patented technology

This invention relates in general to methods and systems of rapid focusing and zooming for the applications in the projection of volumetric 3D images and in the imaging of 3D objects. Rapid variable focusing or zooming is achieved by rapid and repeated change of the object distance or the spacing between lens groups of the projection lens or a combination of both. One preferred approach inserts thin wedge prisms into the optical path and changes their positions relative to the optical path. This changes the thickness traveled through by the optical path and results in effective optical path length change. Another approach folds an optical path by mirrors and moves the mirrors to change the optical path length. For focusing purpose, small and precise displacement is achieved by moving a wedge-shaped optical device obliquely with respect to the optical path. The wedge-shaped optical device can be a thin wedge prism or a mirror on a wedge-shaped base. Optical layout analysis shows that the changes of the object distance, of the spacing between two lens groups and of the image distance are almost in proportion and can be correlated by linear relations. Therefore, the same type of motion function can be used to change these three optical path lengths to achieve focusing and constant magnification.

The present invention relates generally to digital watermarking. In one implementation, we provide a hierarchical digital watermark detector method. The method includes: i) in a first layer of a hierarchical search, performing watermark detection on blocks of at least a portion of an incoming suspect signal; ii) identifying a first block in the portion that is likely to include a decodable digital watermark; and iii) in a second layer of the hierarchical search, performing additional watermark detection on overlapping blocks in a neighborhood around the first block. Another implementation provides a hierarchical watermark detector including a buffer and a detector. The buffer stores portions of an incoming signal. The detector evaluates watermark detection criteria for blocks stored in the buffer, and hierarchically zooms into a neighborhood of blocks around a block associated with watermark detection criteria that satisfies detection criteria.

The invention provides a method for preparing a low-specific surface area magnesium hydroxide flame retardant by using a microchannel reactor. The method comprises the following steps of: continuously introducing a magnesium chloride solution and a sodium hydroxide solution into the microchannel reactor, carrying out a precipitation reaction in the microchannel reactor at the room temperature, filtering the slurry obtained after the reaction to obtain the filter cake, mixing a strong alkali solution with the filter cake to form slurry, feeding the slurry into a hydrothermal synthesis kettle for a hydrothermal reaction, and performing after-treatment on the product of the hydrothermal reaction to obtain the magnesium hydroxide flame retardant. The product obtained by the method provided by the invention has the advantages of small specific surface area, controllable grain size and narrow grain size distribution; and the method is simple in process flow and low in process energy consumption, and can be quickly industrialized.

The invention discloses a display content amplification control method and device and a terminal. The display content amplification control method comprises the steps that after a pressing event on adisplay region of a screen is received, a changeable selected region is formed with the triggering position of the pressing event being a center; and when confirmation operation is received, display content in the selected region is amplified. Through the display content amplification control method and device and the terminal, quick and accurate amplification can be realized.

The invention provides a radar image rapid generation and zooming method, belongs to the field of radar signal processing, and particularly relates to a method for generating a radar image by adoptinga rapid coordinate transformation method and completing rapid zooming of the radar image by adopting a method of directly processing a conversion matrix. The method comprises the steps: establishinga conversion relationship between radar echo data and the radar image through mapping of the radar echo signal and the radar image; and reversely solving a radar image mapping table according to the conversion relation and a radar detection mechanism, reducing the calculation amount of radar image generation, and realizing rapid conversion from the radar echo data to the radar image. Tthe rapid zooming method for establishing the radar image mapping table realizes local detail amplification of the radar image and preview of the whole image and does not lose local detail information while further reducing the calculation amount.

The invention discloses a self-adaptive turn-off two-stage sensitive amplification circuit. The circuit comprises a first NMOS transistor, a second NMOS transistor, a first-stage sense amplifier, a second-stage sense amplifier and an adaptive feedback circuit. The adaptive feedback circuit comprises an exclusive-OR gate, an OR gate and a delay chain. When the two differential input signals are input into the two-stage sensitive amplifying circuit for amplification, the differential input signals are amplified. The adaptive feedback circuit controls the first-stage sensitive amplifier and the second-stage sensitive amplifier to be turned on; the first-stage sensitive amplifier and the second-stage sensitive amplifier accelerate amplification and output of signals step by step, and after thesignals amplified and output by the two-stage sensitive amplifier circuit reach recognizable numerical level, the self-adaptive feedback circuit controls the first-stage sensitive amplifier and the second-stage sensitive amplifier to be turned off; the static random access memory has the advantages of high amplification speed and low power consumption, and can have high data reading speed and lowpower consumption at the same time.

The invention provides a method for accelerating a DRAM (dynamic random access memory) sensitive amplifier. The method comprises the steps as follows: a grid signal SANT of a first NMOS (N-channel metal oxide semiconductor) transistor rises to turn on the first NMOS transistor, a drain signal NCS of the first NMOS transistor is reduced to the earth voltage, and a reference bit line bl_n starts to be pulled to the earth voltage; then a grid signal SAP1T of a second NMOS transistor rises to break over the second NMOS transistor, a source signal PCS of the second NMOS transistor is raised to a high voltage VOD, a voltage of a bit line bl is quickly raised to be higher than a voltage VBLH, and then the grid signal SAP1T of the second NMOS transistor is changed to be in a low level; then a grid signal SAP2T of a third NMOS transistor rises to break over the third NMOS transistor, a source signal PCS of the third NMOS transistor is pulled to a voltage VBLH, and the bit line bl is slowly reduced to the voltage VBLH. According to the method, the reliability of a DRAM memory cell is guaranteed.

The invention provides a sensitive amplifier, a semiconductor storage device and a voltage difference amplification method. The sensitive amplifier comprises four transistors, wherein the drain electrode of the first transistor is connected with a first data line, a source electrode is connected with a first clock signal, and a grid element is connected with a second data line; the drain electrodeof the second transistor is connected with the second data line, the source electrode is connected with a first clock signal, and the grid electrode is connected with the first data line; the sourceelectrode of the third transistor is connected with a second clock signal, and the grid electrode is connected with the second data line; the drain electrode of the fourth transistor is connected withthe second data line, the source electrode is connected with the second clock signal, and the grid electrode I connected with the first data line; the second clock signal is started when a voltage difference between on the first data line and voltage on the second data line achieves a first threshold value, and the third transistor and the fourth transistor amplify the voltage difference; and thefirst clock signal is started when the voltage difference achieves a second threshold value, so that the first transistor pulls down voltage on the first data line, flexibility can be improved, and amplification speed is improved.

A method for choosing zoom-out range features that a box is inserted in a picture displayed on display screen and them moved to any position on the picture, and the contents in the box can be zoomed out by the proportion setting. Said methods can be used for drafting computer.

The present invention discloses a zoom lens and a security camera device. The zoom lens comprises: a lens barrel, a moving carrier and a moving lens, wherein the lens barrel is provided with an innercavity, the moving carrier is movably arranged in the inner cavity, the moving carrier can slide in a reciprocating mode in the length direction of the lens barrel, and the moving lens is contained inthe inner cavity and arranged on the moving carrier; and a driving device which comprises a magnet and a power-on coil, one of the magnet and the power-on coil is arranged on the moving carrier, theother one of the magnet and the power-on coil is arranged on the inner wall of the inner cavity, and the power-on coil and the magnet are oppositely arranged. By utilizing the principle that the electrified coil generates interaction force with the magnetic field generated by the magnet after being electrified to generate the magnetic field, relative movement is generated between the electrified coil and the magnet, and the electrified coil or the magnet drives the moving carrier for bearing the moving lens to move, so that zooming is realized, and the zoom lens has the effects of high zoomingspeed, no abrasion, low noise and low power consumption.

A system for remotely detect that working state of a circuit break including circuit breakers, Temperature sensor, Circuit break sensor and single chip microcomputer, Both the temperature sensor and the open circuit sensor are mounted on the open circuit. Temperature sensor, A circuit breaker sensor is respectively connected with a signal amplification module through a signal acquisition module, The signal amplification module is connected with a single-chip microcomputer, the single-chip microcomputer is connected with an alarm, the memory is connected with a background monitoring center through an Internet module, the structure principle of the invention is simple, the intelligence degree is high, the real-time monitoring of the working state of the circuit breaker can be realized, and the normal work of the circuit breaker can be ensured.

The invention provides a zoom lens. The zoom lens comprises a voice coil motor stator, a voice coil motor rotor and an elastic support structure, the voice coil motor rotor is arranged in the voice coil motor stator, a light through hole is formed in the voice coil motor rotor, a zoom lens body is arranged in the light through hole, and the elastic supporting structure is connected with the voicecoil motor stator and the voice coil motor rotor at the same time. When the voice coil motor rotor is electrified in the magnetic field of the voice coil motor stator, the voice coil motor rotor can drive the zoom lens body to reciprocate; according to the zoom lens, the axial movement of the zoom lens body is controlled through electromagnetic induction generated between the voice coil motor stator and the voice coil motor rotor, and the elastic supporting structure is connected with the voice coil motor stator and the voice coil motor rotor at the same time, so that the overall structure issimplified, and the size and the weight are reduced; and the resetting of the voice coil motor rotor and the zoom lens body can be accelerated, the zoom speed is improved, and the zoom stability is maintained.