36results about How to "Reduce light requirements" patented technology

A high performance zoom lens system suitable for use with a camera is disclosed. The zoom lens systems employs liquid optics and a movable lens group to provide optical performance over the zoom focal length range at focus distances from close to infinity. The system also provides compensation for undesirable thermally induced effects by adjustments of the zoom group and the variably shaped optical surface in the liquid lens cell.

The invention discloses an in-water color particle image velocimetry system comprising a river project model, color tracer particles, a color web camera, a POE (power over Ethernet) switch and a digital image processing device. The color tracer particles are evenly distributed in water flow of the river project model, the web camera mounted above a surface of the water flow of the river project model is connected with the POE switch connected with the digital image processing device comprising digital imaging processing software. The invention further provides a color particle image velocimetry measuring method. By the arrangement, the technical problems that a black and white video camera sets higher requirements for light condition and is prone to being affected by light noises, more error vectors appear in flow field data, so that measuring accuracy is affected are solved.

An apparatus for producing motion pictures using real time composites of computer generated virtual backgrounds and live foreground images recorded on a sound stage includes camera motion tracking, automated lighting control, on-line editing, and production and asset management to accelerate the pace and reduce the cost of motion picture production.

A light emitting diode packaging structure includes a package body, a red LED chip, a blue LED chip, a green LED chip, a package material and a yellow phosphor. Three LED chips are disposed within an accommodating room of the body package and covered by the package material. The yellow phosphor is uniformly mixed with the package material. A white light is formed by a mix of three types of light from the LED chips. Additionally, a yellow light which is generated from the excitement of the yellow phosphor with the blue light is mixed with a part of the blue light to further form the white light.

The invention provides a parking space identification method and device by using a laser light knife as an auxiliary light source. The device is composed of the laser light knife, a camera, a computer and display equipment. When detection is needed, the computer gives out a control instruction first, the laser light knife is used for emitting a fan beam, and the fan beam is projected to a whole row of parking spaces to be detected to form a straight line beam which penetrates through the whole row of parking spaces transversely; the camera is used for collecting the beam images formed by the laser light knife on all the parking spaces, if one image is a section of straight line, it means that the corresponding parking space is vacant, and if the image is a section of arc placed above the straight line, it means that the corresponding parking space is occupied. The parking space identification device can be used for detecting one row of parking spaces, the image processing algorithm is simple and reliable, meanwhile, the requirement for lighting conditions is lowered, and normal detection can still be conducted even in an all-black underground parking garage.

The invention relates to a quick-charging circuit of a solar lead-acid storage battery. The quick-charging circuit comprises an input portion, a voltage stabilization module, a charging control circuit, a main charging circuit and a charging mode selection and indicating lamp circuit, wherein the input portion comprises a solar panel and a transformer rectifier circuit, a mains supply is connected with the transformer rectifier circuit and the selection switch for output, output of the input portion is connected with a voltage stabilization circuit, output of the voltage stabilization circuit is connected with the main charging circuit, the charging mode selection and indicating lamp circuit is connected with the charging control circuit and transmits a charging selection mode into a core chip of the charging control circuit, the core chip outputs pulse-width modulation (PWM) control signals to the main charging circuit to control charging, and the main charging circuit outputs to the lead-acid storage battery for charging. The lead-acid storage battery can be charged quickly and protected through solar energy or the mains supply, three charging modes such as second-order voltage, second-order current and pulses can be selected, the charging speed is fast, the loss is low, and the service life of the lead-acid storage battery can be effectively prolonged.

The invention discloses an indoor raising method for bean aphids. The method includes the steps of seedling culture of red beans and propagation expanding of the bean aphids. The seedling culture of the red beans includes the steps of preparation of bean seed soaking liquid, soaking of bean seeds, germination accelerating, seedling culture and the like. The propagation expanding of the bean aphids includes the steps of inoculation of the bean aphids, propagation expanding of seed-source bean aphids, propagation expanding of the bean aphids for propagating natural enemies, and the like. By means of the method, the requirements on temperature, humidity and illumination are not high, a fiber cloth seedling culture substrate is adopted during seedling culture, time is greatly saved, the seedling culture and seedling period management cost is greatly reduced, and good economic benefits and social benefits are achieved.

The invention discloses a focusing system, method and device, and belongs to the technical field of communication. The focusing system comprises a sensor, a transmitting plate and a focusing module, signal transmitting units which are arranged in an array mode are arranged on the transmitting plate, and the frequencies of transmitting signals transmitted by the signal transmitting units are different, wherein the signal emission unit is configured to send an emission signal to a first surface of a shooting object after a camera is started; the sensor is configured to determine a measurement distance between each position point of the first surface and the camera based on the transmitting frequency of the transmitting signals and the reflecting frequency of the reflecting signals after receiving the reflecting signals corresponding to the plurality of transmitting signals; and the focusing module is configured to focus the shooting object according to the plurality of measurement distances. According to the invention, the focusing accuracy can be improved on the basis of rapid focusing.

The present invention provides a PCB (Printed Circuit Board) graph spindle direction calculation method. The method comprises the steps of: performing binaryzation processing of all the pixel points of a PCB image corresponding to a preset fixed threshold value to obtain pixel values of all the pixel points; according to the pixel values of all the pixel points, calculating contour points of a target graph in the PCB image; calculating the contour center of gravity of all the contour points in the target graph; according to the contour center of gravity and the contour points, calculating thesecond-order center distance of the target graph; and according to the second-order center distance of the target graph, calculating and obtaining the spindle direction of the target graph. The PCB graph spindle direction calculation method employs a binaryzation method and the contour points to calculate the spindle direction of the PCB graph so as to greatly improve the calculation efficiency ofthe spindle direction of the PCB graph.

The invention discloses a water flow velocity measurement method based on a motion enhancement feature, and the method comprises the following steps: collecting and framing water flow video data, calculating a frame difference image through employing a frame difference method, counting disturbance noise, filtering the disturbance noise, enhancing the filtered image through employing a histogram equalization method, generating a water flow feature displacement, dynamically filtering water flow vector outliers, estimating a water flow velocity value, performing filtering, enhancement and secondary difference on continuous multiple frames of continuous water flow images to obtain an intermediate result after motion is remarkably amplified, performing corner detection and constrained matching on the intermediate result, and performing optimization on a continuous statistical result. A good real-time measurement effect can be obtained, and finally, a classification model trained by a collected reference object data set is utilized to further ensure the reliability of a reference point selected for flow velocity estimation. The method can play a role in a more universal water body environment and a weaker light environment, and is easy for landing use of hydrological intelligent monitoring engineering.

The invention discloses a silicon-tungsten polyoxometallate doped ferric oxide composite nano catalytic material with an inorganic structure as well as preparation and application thereof, and relates to a catalytic material as well as preparation and application thereof. The invention aims to solve the problem that the catalytic efficiency is low when polyoxometallate catalyzes and degrades organic matters which are difficult to degrade at present. The invention discloses synthesis and characterization of a composite material Co2Co4 (SiW10O37) 2/Fe2O3 synthesized by a eutectic method and degradation of a methyl orange solution by the composite material Co2Co4 (SiW10O37) 2/Fe2O3. The influence of different synthesis pH conditions on the polyoxometallate and the composite material is explored, and the optimal synthesis condition of the composite material is determined. Photocatalysis experiment results show that the composite material has the best catalysis effect on target dye when the pH is 1 and the concentration of methyl orange is 10 mg/L, and after a photocatalysis reaction, the degradation rate of methyl orange can reach 76.2%. The method is applied to the field of sewage treatment.