598 results about "Dark zone" patented technology

A technique for digitally capturing a high contrast color image involves simultaneously capturing image data from bright and dark areas using an image sensor with pixels of the same color that have different sensitivities to the bright and dark areas. The image data from the different sensitivity pixels is then used to generate a final image that includes features from both the bright and dark areas. An embodiment of a digital imaging system includes an image sensor with a first group of pixels that have a first sensitivity to a first color and a second group of pixels that have a second sensitivity to the same color. Image data that is captured by the two groups of pixels is brought to a common scale by a scaling unit before the image data is used to generate demosaiced image data. The scaled image data is used by a demosaic unit to determine intensity values for the first color at all of the pixel locations. Errors in the demosaiced intensity values that result from capturing the first color image data with pixels of two different sensitivities are corrected by an error correction unit to generate a final image that accurately depicts the original high contrast color image.

The backlight system of the invention creates illumination behind a liquid crystal or other transparent display. In one mode of operation it produces a series of precise, thin slanted lines with dark space in between which are used to make multiple perspective views, displayed simultaneously on the LCD, visible from a series of horizontally spaced viewing zones spaced in front of the display. In another mode of operation, it produces even diffuse illumination similar to that generated by conventional backlights, allowing the LCD to display conventional 2D images.

A method for high dynamic range compression uses a modified cumulative histogram as a compression curve. This curve is computed from the cumulative histogram of the image with constraints that the local derivative on the curve does not exceed a certain limit. The limit is fixed along the curve or the limit is variable, taking into account noise characteristics at various pixel values. To provide appropriate detail preservation, a smoothing filter is used to separate the image into an illumination image, referred to as a base image, and a detail image, and the compression curve is applied to the base image only. The compression method provides high dynamic range compression of the image while preserving the global contrast perception. Conventional global algorithms for high dynamic range compression are not capable of achieving this result. The proposed high dynamic range compression method also minimizes noise amplification while lightening the dark areas during image compression.

A lens includes a convex surface formed in an outer surface thereof facing away from a light source to uniformly distribute light emitted from the light source; a concave surface concaved inward from an inner region of the convex surface, around an optical axis; and a convex portion convexed outward from a central region of the concave surface, which the optical axis intersects, in order to enhance quantity of light around the optical axis. The lens refracts light beams falling onto the respective areas thereof at different angles, thereby producing a uniform light distribution within a specific lighting range, but does not create a dark area around an optical axis.

A flexible pouch is provided which has panels (3, 5). A transparent strip (13) is provided on one of the panels and a translucent filter (13a) on the other. The panels are heat sealed together to close the pouch and the integrity of the heat seal is determined by shining ultraviolet light through the clear strip and inspecting the translucent filter (13a) so that imperfections in the seal can be identified. Pouches are packaged into containers (25) which include slots (50) and the full containers are stacked for transport through the plant for further processing in a retort, cooler or the like. This enables a large number of pouches to be easily transported through the plant for further processing after they have been filled and heat sealed. The heat sealing line may include a vision system, or the vision system may be a stand-alone item for inspecting the seal to determine the integrity of the seal. The vision system includes a UV light source for directing UV light through the transparent strip and a camera for inspecting the translucent filter (13a) to obtain an image of the filter (13a). The image is processed to identify dark regions which enable the integrity of the seal to be determined.

An ADB headlamp distributes light having more partial pattern segments than light sources form a dark zone in a segment where a preceding or oncoming vehicle is located is provided. The adaptive driving beam (ADB) headlamp for a vehicle includes first lamp and second lamps having a plurality of light sources. The plurality of partial patterns irradiated from adjacent light sources included in the first and second lamps respectively, partially overlap other to form a first and a second light distribution patterns. The first and second light distribution patterns formed by the first and second lamps partially overlap each other to form a light distribution pattern. The light distribution pattern is divided into a plurality of partial pattern segments that correspond to the location of a sensed vehicle ahead selected from the partial pattern segments. A dark zone is formed by the partial pattern segments by reducing a light source.

The invention relates to a human eye detection method, apparatus, system and storage medium. According to the invention, candidate eye areas are detected from a given image by: reading in the image; analyzing the image and getting a list of candidate eye areas; selecting one unverified candidate eye area from said list; determining a neighborhood region of the selected candidate eye area; calculating the neighborhood region's size, which is recorded as S; processing the region, obtaining dark areas; counting the number of dark areas, which number is recorded as N; comparing the ratio N/S to a predetermined first threshold, if the ratio N/S is smaller than said first threshold, the candidate eye area is determined as a false eye area and deleted from the list; else, the candidate eye area is determined as a real eye area and remains in the list; repeating foresaid selecting step to comparing step until there is no unverified candidate eye area in the list; and outputting the list for purpose of subsequent processing of the image. The invention may be applied to human body detection.

A car light module comprises a dipped beam concentrator (1), a lens (3), a lens collar (4), a radiator (5) and a dipped beam LED circuit board (7); the dipped beam concentrator (1) comprises at least one dipped beam optically focused unit (1-1) arranged in the rear end, an III zone forming unit (1-2) arranged on the bottom, a 50L dark zone forming unit 1-4, and a dipped beam concentrator cut-off line forming unit (1-3) arranged in the front end; by using the structure, the cut off line can be formed without using a shadow shield part to shield, so the space occupation volume is small, and space utilization efficiency and light distribution efficiency are higher.

The invention relates to a plate-type photobioreactor, which comprises at least one flow channel, wherein each flow channel comprises at least 2 upper baffle plates, which are arranged on the inner wall face on a light receiving side, and at least 2 lower baffle plates, which are arranged on the inner wall face on a backlight side; and the included angles of the length directions of the upper and lower baffle plates and the flowing direction of culture solution are 20 to 70 DEG and are opposite. The plate-type photobioreactor has a specific internal structure, allow microalgae cells to move back and froth between the bright and dark areas in the photobioreactor, and give play to the 'flash effect' of the microalgae cells, thereby improving the light energy utilization and microalgae cells yield of the microalgae large-scale culture. The plate-type photobioreactor disclosed by the invention is suitable for large-scale culture of various microalgae cells.

A backlight assembly removing dark areas and a display device including the backlight assembly are provided. The backlight assembly includes a light source to emit light, and a light guiding plate which receives and guides the light emitted from the light source. A light diffusing area is formed in a light incident portion of the light guiding plate.

The invention relates to a light guide board, a backlight module and a method for transmitting light. The light guide board comprises a bottom surface, a light emergent surface opposite to the bottom and a light incident surface connected with the bottom surface and the light emergent surface, and light enters the light incident surface and is transmitted in the light guide board. The light guide board also comprises a light transmission substrate and a first groove, wherein the light transmission substrate is provided with at least one through hole, the first groove is arranged on the light transmission substrate and on the periphery of the through holes. The invention can solve the problem of dark zone behind the through hole and can improve the utilization efficiency of the light.

A light guide plate having a pattern to minimize generation of a dark zone and a backlight unit including the same are disclosed. The light guide plate includes an intaglio pattern consisting of recesses formed in a surface opposite to a light emitting surface thereof to have a cross section having major-axis and minor-axis diameters and depth, the recesses being spaced apart from one another in first and second directions by first and second distances respectively. The density of the intaglio pattern is directly proportional to the major-axis and minor-axis diameters and depth, and is inversely proportional to the first and second distances. The intaglio pattern has the minimum density in a first region adjacent to a light source, and the maximum density in a second region that is the maximum distance from the light source. A density ratio of the maximum density to the minimum density is 900.

The embodiment of the invention provides a method and device for backlighting detection. The method comprises the steps that the brightness value of each image block in an image to be detected is obtained; according to the brightness value of each image block, the brightness relation between the adjacent image blocks is determined; according to the brightness relation between the adjacent image blocks, a dark zone and a bright zone in the image to be detected are determined and according to the dark zone and the bright zone, whether the image to be detected is in a backlighting scene or not is determined. The method and device for backlighting detection can improve the accuracy of backlighting detection.

An illumination light is projected onto a tear film lipid layer on a cornea of an eye to be examined, and the reflected light is received and the tear film lipid layer is imaged. The image of the tear film lipid layer that has been captured is processed, and the initial spread speed H′ of the tear film lipid layer at the time the eyelid has been opened is measured. The image of the tear film lipid layer that has been captured is processed, and the time until the tear film lipid layer is broken up after the eyelid has been opened and a dark area T appears is measured. The appearance time of the dark area is plotted on the Y-axis and the initial spread speed H′(0) of the tear film lipid layer is plotted on the X-axis, and the type of dry eye is classified. In such a configuration, since the type of dry eye can be classified and determined, diagnosis and treatment in accordance with the type of dry eye are made possible.

The embodiments of the invention disclose an image processing method and device and electronic equipment. The image processing method comprises the steps of performing image acquisition on a current scene to obtain a reference image of the current scene; dividing the reference image into a plurality of areas, and respectively obtaining the brightness values of all the areas, and determining a light source center position of the reference image according to the brightness value of each region; and determining the weight of each area according to the area distance from each area to the light source center position and/or the ratio of the brightness value of each area to the brightness value of the area where the light source center position is located. By means of the embodiments of the present invention, bright region exposure can be inhibited and dark region exposure can be increased, so that photosensitive uniformity of the image is integrally improved, and the image quality is improved.

A device for shaping light beam of heavy power laser diode stack is prepared as corresponding each rush bar of laser diode stack to each line reflector of stacked step reflector, setting the second step reflector above stacked step reflector, reflecting light spot being formed from each rush bar of laser diode stack and being collimated by fast shaft to fast shaft direction and driving said light spot to be n sections at slow shaft direction for eliminating dark region between rush bars off, reflecting n sections light beam by the second step reflector to turn light beam in 90 degree for realizing light beam-shaping.

A head-mounted display (HMD) is provided. The HMD includes: an image-forming unit that produces and emits an image; a half mirror disposed obliquely with respect to the image-forming unit for transmitting some part of the image entering from the image-forming unit and transmitting the remaining part; a pinhole located at a focal point of the image reflected from the half mirror for transmitting the incident image and focusing the transmitted image onto a dark space within the housing; a collimating lens disposed opposite the pinhole with respect to the half mirror for converging the incident divergent image and producing parallel light; a prism unit disposed opposite the collimating lens for guiding the path of the incident image; and a Fresnel lens disposed opposite a part of the prism unit for focusing the incident image onto an eyeball. A user wearing the HMD can view the image formed in the housing through the pinhole.

The invention discloses a method of distinguishing multiple touch points applied to an optical touch system which includes a panel for indicating a first touch point and a second touch point thereon and a camera unit for capturing an image relative to the first touch point and the second touch point. The image has a first dark area and a second dark area corresponding to the first touch point and the second touch point respectively. In the method, if it is observed that the first dark area and the second dark area merge into a first single dark area and a second single dark area at current time and previous time respectively, the respective positions of the first dark area and the second dark area are determined based on the respective union dark area widths of the first single dark area and the second single dark area, and the respective coordinates of the first touch point and the second touch point are determined according to the respective positions of the first dark area and the second dark area.

One embodiment described herein may take the form of a system and/or method for monitoring a position of a mobile device and pausing play or recording a multimedia presentation when the mobile device enters or approaches a zone where a wireless signal may be degraded or lost. In one embodiment, the mobile device may utilize a global position system (GPS) signal to determine the location of the mobile device. Further, the mobile device may be configured to display one or more multimedia presentations and may, in response to the mobile device being located near or within a dark zone, pause play of the multimedia presentation until the mobile device returns to a zone of sufficient wireless signal coverage. In this manner, the mobile device may prevent the user from losing or missing portions of the multimedia presentation due to lost or degraded wireless signal of the mobile device.

The invention provides an LCD device, which comprises a liquid crystal panel and a backlight module, wherein the backlight module is located below the liquid crystal panel and comprises a rubber frame, a light guide plate, a light source and a steel frame; the rubber frame bears the liquid crystal panel, and comprises a horizontal frame edge and a vertical frame edge; the horizontal frame edge comprises a main body and a light-transmitting part; the light-transmitting part is connected with the main body and bears the liquid crystal panel together with the main body; the vertical frame edge is connected with the horizontal frame edge to form an accommodation space. The light guide plate is located below the liquid crystal panel and accommodated in the rubber frame. The light source is located on one side of the light guide plate, and is arranged on the vertical frame edge. The steel frame is coated on the liquid crystal panel, the rubber frame and the light guide plate, wherein light emitted by the light source penetrates the light guide plate to pass through the light-transmitting part. By adopting the invention, the bearing area of the rubber frame is not reduced, the slim border effect can be greatly achieved, the problem of the dark zone caused by visual angle enlargement is avoided, and the visual taste is improved.

A cost effective high efficiency automatic plant cloning system which provides for accelerated plant shoot propagation is disclosed. A water and nutrient re-circulating system that is controlled off and on provides plant shoot immersion wetting and drying cycles. Plant shoots are supported in porous fibrous plant shoot medium that is placed in water and nutrient conducting channels where the water and nutrient in the on cycle contact and repeatedly wet the plant shoot and its emerging root structure. The porous fibrous plant shoot medium also provides for the growing plant shoot to expand without any hindering of the plant shoot and emerging root structure. The porous fibrous plant shoot support medium also provides for the circulation of air and absorption of light with ultra violet rays for maintaining the porous fibrous plant shoot medium free from adverse growth mechanisms, while at the same time providing for a dark zone in which the plant shoot root structure takes place In the off cycle, air dries the plant shoot and the emerging root structure. The on-off cycle of wetting and drying is controlled automatically to provide optimum and accelerated growth of the plant shoots to developed root structure for early transplanting to a soil environment with a minimal loss of plant shoot material.