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61 results about "Environmental lighting" patented technology

On-line sequential extreme learning machine-based incremental human behavior recognition method

The invention discloses an on-line sequential extreme learning machine-based incremental human behavior recognition method. According to the method, a human body can be captured by a video camera on the basis of an activity range of everyone. The method comprises the following steps of: (1) extracting a spatio-temporal interest point in a video by adopting a third-dimensional (3D) Harris corner point detector; (2) calculating a descriptor of the detected spatio-temporal interest point by utilizing a 3D SIFT descriptor; (3) generating a video dictionary by adopting a K-means clustering algorithm, and establishing a bag-of-words model of a video image; (4) training an on-line sequential extreme learning machine classifier by using the obtained bag-of-words model of the video image; and (5) performing human behavior recognition by utilizing the on-line sequential extreme learning machine classifier, and performing on-line learning. According to the method, an accurate human behavior recognition result can be obtained within a short training time under the condition of a few training samples, and the method is insensitive to environmental scenario changes, environmental lighting changes, detection object changes and human form changes to a certain extent.
Owner:SHANDONG UNIV

Consistent lighting method under falsehood-reality fused environment

InactiveCN102096941ARealize full-frequency ambient lighting rendering effectImprove realism3D-image renderingComputer graphics (images)Bidirectional reflectance distribution function
The invention discloses a consistent lighting method under a falsehood-reality fused environment, comprising the following steps: shooting a high dynamic range image reflecting a real environment, of a small mirror-surface sphere in a real scene, and acquiring an environmental lighting map of the real scene; preprocessing the environmental lighting map of the real scene and surface reflection attributes of a virtual object; preprocessing the environmental lighting of the real scene to generate environment lighting on a unit small sphere under local coordinates corresponding to all normal vectors to obtain Haar wavelet coefficients of the environment lighting; preprocessing a bidirectional reflection distribution function to generate slices of the bidirectional reflection distribution function on the unit hemisphere under all sight directions to obtain Haar wavelet coefficients of the slices; and drawing a falsehood-reality fused environment, indexing the wavelet coefficients of the environment lighting and the slices of the bidirectional reflection distribution function according to a normal vector of an apex of the virtual object and the sight directions, calculating a vector product of the coefficients to obtain an apex drawing color, and meanwhile, accelerating by adopting GPU (Graphics Processing Unit). The consistent lighting method can be used for efficiently realizing afull-range environment lighting drawing effect under the falsehood-reality fused environment.
Owner:BEIHANG UNIV

Optical anti-counterfeiting film used for certificates and application thereof

The invention relates to a visual optical anti-counterfeiting film used for certificate surface, belonging to the public safety precaution and identification technical field. The optical anti-counterfeiting film can be widely applied to anti-counterfeiting and identification of identity certificates such as identity card, passport, police identification card, press card, certificate of lawyer, admission card for event and the like. The invention is characterized in that the optical anti-counterfeiting film is composed of a base layer, an information layer, a metal or metal compound layer and an embedding protective layer at least which are sequentially arranged from the top to bottom, wherein the interior of the base layer is embedded with multiple space frequency composite modulation microstructure stripe. Compared with the prior art, the invention has the following advantages: spatial use ratio is high, diffraction image without mutual interference can be seen at different angles in the same region; image vision angle width reappears in reflected light direction, colour saturation is high, influence of environmental lighting source is less; the reflected light direction can be light discoloration produced by the way that light continuation is simultaneously taken place on more than three broken colours; the restored true colour combined by RGB three colours can be reproduced in the reflected light direction; dynamic diffraction image can be reproduced by virtue of edge lighting light. The invention can be widely applied to visual anti-counterfeiting identification of identity certificates of resident identity card, passport, police identification card, press card, certificate of lawyer, teacher certificate.
Owner:上海冠众光学科技有限公司 +1

Projection display color reproduction method under normal lighting environment

The invention discloses a projection display color reproduction method under normal lighting environment, which comprises three parts, namely projection display color reproduction characterization, equivalent reproduction target color value determination, and equivalent reproduction of color. The projection display color reproduction characterization is used for analyzing and describing color characteristics of a projector camera system, a display surface and environmental lighting; the equivalent reproduction target color value determination is used for analyzing and determining the reproduction capacity of the whole system under the current display environment, and obtaining a target color value in the reproduction capacity range and equivalent with the input original image color according to the reproduction capacity; and the equivalent reproduction of color is used for processing the target color value and obtaining an input color value required by the reproduction target color value according to the input/output color conversion relationship. The method does not depend on the measurement of other physical equipment, has low calculation cost and is favorable for developing the projection display to the portable and flexible mobile application direction.
Owner:ZHEJIANG UNIV

Method for adjusting light of semiconductor lamp by adopting self-adaptive pulse-width modulation technology and lamp

InactiveCN101577996AControl luminous intensityOvercome the shortcomings of not being able to effectively dim traditional lampsElectric light circuit arrangementEnergy saving control techniquesLuminous intensityOptimal control
The invention relates to a method for adjusting the light of a semiconductor lamp by adopting a self-adaptive pulse-width modulation technology and a lamp. The method adopts optimal control of time, people and vehicle flow rate and environmental lighting degree and outputs pulse-width modulation signals from a self-adaptive pulse-width modulation end to control the lighting intensity of a lighting element so as to achieve the optimal match of the actual lighting degree. The lamp consists of a lamp body assembly, a bracket, the lighting element, a transparent lampshade and a lamp circuit assembly. The bracket is fixed in the lamp body assembly, the lighting element is arranged on the bracket, the lamp circuit assembly is arranged in the lamp body assembly and the transparent lampshade is arranged on the lamp body assembly. The lighting element consists of a semiconductor high brightness LED, a radiator and a temperature sensor. The lamp circuit assembly consists of a power supply module, a power supply switch-protection module, a power control module, a lighting module, a computer module U6, a sensor module, a clock module and a wireless date transmission module U5.
Owner:湖南星珂环保科技有限公司

DMD-based imaging pre-processing device and method

The invention discloses a DMD-based imaging pre-processing device and a DMD-based pre-imaging processing method. The DMD-based pre-imaging processing device comprises a CCD, a first lens group, a DMD, a second lens group, a DSP and an object space working surface. Spatial one-to-one correspondence between micro mirror-image elements in the DMD and CCD pixels is realized, and coordinate corresponding relation imaging of the CCD and the DMD and corresponding relation imaging of the DMD and the object space working surface are performed, and therefore, the pre-imaging processing device can process incident light before imaging. According to the DMD-based imaging pre-processing device and method of the invention, the focus of the work of image processing is shifted from post-imaging to an optical path of pre-imaging; and corresponding imaging of the CCD and the DMD is utilized, such that the gray range index of an imaging gray histogram can be increased, and therefore, the dynamic range of an imaging system can be expanded. With the DMD-based imaging pre-processing device and method of invention adopted, defects in environmental lighting and a field of view can be eliminated, and imaging quality and visual expressivity of an object can be improved. The DMD-based imaging pre-processing device and method of the invention can be widely applied in fields such as industrial inspection, medical imaging and astronomical observation.
Owner:TIANJIN UNIV

Environmental atmosphere lamp system and control method thereof

InactiveCN101859511AExpressiveAddress the need to participate in the design of ambient lighting systemsStatic indicating devicesImage data processing detailsImaging processingComputer graphics (images)
The invention relates to an environmental atmosphere lamp system comprising an image processing device and an image displaying device; and the environmental atmosphere lamp system is characterized in that the image processing device calculates a plurality of main colors with highest frequency of occurrence in a source picture file to be displayed, thereby compressing the source picture file according to the main colors and transmitting the data of the main colors into the image displaying device for displaying. Because of adopting a picture file which only retains the main colors with the preset number and is obtained by compression to reduce a source picture to be displayed, the environmental atmosphere lamp in the invention can display nearly one thousand colors, can preset, regulate and control the required colors by specific software in a computer, has the characteristics of direct functions and good versatility and can be widely suitable for a display screen device of a common LED tricolor lamp in the market; and moreover, the invention can effectively meet the requirement on a user participating in the design of an environmental lighting system and can be widely applied to various indoor places.
Owner:HANGZHOU YINAO INTELLIGENT TECH

Automobile light automatic regulation system

InactiveCN101493712AIntelligent stepless adjustment of light intensityControl Light BrightnessElectric light circuit arrangementElectric variable regulationAuto regulationInformation processing
The invention relates to an automatic automobile-lighting regulating system, comprising a lighting signal collecting unit used for collecting the lighting signal information around the automobile, and a programmable information processing unit which is connected with the lighting signal collecting unit and used for intelligently controlling the work of the automobile lights. The programmable information processing unit comprises a lighting signal storing device which is connected with the lighting signal collecting unit and used for storing a collected lighting signal value, a preset signal value storing device used for storing a preset lighting signal value, a comparing device used for comparing the lighting signal value stored in the lighting signal storing device with the preset lighting signal value stored in the preset signal storing device, and a linear control circuit which is controlled by an output signal of the comparing device and used for controlling the linear change of the work power of automobile lights. The automatic automobile-lighting regulating system can effectively save energy and reduce the configuration cost of automobile lights; and the optimal illumination for driving can be realized automatically according to the environmental lighting around the automobile so as to bring more convenience for the driver.
Owner:深圳市泰顺友电机电有限公司
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