45 results about "Shadow casting" patented technology

The subject matter discloses a method of determining whether a point in a computerized image is visible from a viewpoint; said image is represented as a point cloud, the method comprising: performing inversion on a the vicinity of the point thus creating a computerized inversed objects each point in the vicinity of the point is related to a parallel point in the computerized inversed object and obtaining a convex hull of the inversed object; the point is likely to be visible from the viewpoint in case it belongs to the point set composing the convex hull. The method is also useful for shadow casting and for determining the location of an image-capturing device within a volume

When planning and setting up wind power installations, the visual detractions to be expected on the part of the wind power installation on the environment play an increasingly important part in approval and acceptance. The shadow casting caused by the wind power installation on the adjoining properties is often perceived by the residents as being very troublesome. A wind power installation is provided by means of which shadow casting regulation is improved. That is achieved by a method of operating a wind power installation wherein a first light intensity is detected in a region of direct light irradiation and a second light intensity is detected in a shadowed region, and wherein the wind power installation is shut down if the difference between the first light intensity and the second light intensity is greater than a predetermined value.

A device for detecting an incident light distribution. The device has an array of light sensors, and a shadow casting element spaced above the light sensor array, with the shadow casting element between the incident light to be modelled and the sensor array. A processor interprets a cast shadow detected by the light sensor array thereby to derive information relating to the directional distribution of the incident light.

The light unit includes a lens, shadow-forming surface, and a shadow casting surface. Outside light entering the light unit is at least partially blocked by the shadow casting surface so as to cast a shadow on the shadow-forming surface. The shadow casting surface may be embedded within or on a surface of the lens or otherwise supported above the shadow forming surface. The shadow casting design is preferably spaced from the shadow-forming surface.

The present invention relates to systems for protecting against sun's damaging rays, and against unwanted onlookers like drones. The systems comprise a drone and a covering member attached to the drone. In one aspect, a Flight Control System, FCS, flies the drone in a selected spot. In one embodiment, the covering member acts like an overhead covering, and a measuring device provides the FCS information for flying the drone on a holding position over a stationary user. In another embodiment, a measuring device enables the FCS to fly the drone over a non-stationary user and to tracking him. Further, the FCS adjusts the drone position with respect to the position of either the sun or a detected drone in the sky. In another embodiment, a radio control, transmitter receiver, pair is used to communicate user's requests to the FCS. One request may be to turn on the motors.

A vision system is provided to determine a positional relationship between a semiconductor wafer on a platen and an element on a processing machine, such as a printing screen, on a remote side of the semiconductor wafer from the platen. A source directs ultraviolet light through an aperture in the platen to illuminate the semiconductor wafer and cast a shadow onto the element adjacent an edge of the semiconductor wafer. A video camera produces an image using light received from the platen aperture, wherein some of that received light was reflected by the wafer. The edge of the semiconductor wafer in the image is well defined by a dark / light transition.

The invention provides a shadow casting technique based automatic shoot positioning correcting system and method. The system comprises a calculating module, a shadow casting module and a first identification point acquiring module, wherein the shadow casting module acquires first coordinate data, and casts shadow of a positioning identification point according to the first coordinate data; the first identification point acquiring module acquires the positioning identification point, and obtains second coordinate data; the calculating module calculates the first coordinate data and the second coordinate data to obtain third coordinate data; the shadow casting module casts shadow of a first correcting identification point according to the third coordinate data, and enables the first correcting identification point to be coincided with the positioning identification point. The shadow casting technique based automatic shoot positioning correcting system and method are convenient to operate, and have relatively outstanding technical effects.

The present invention provides an improved system and method for rendering shadows in a computer graphics system. Textures representing the area of influence resulting from a combination of light sources and shadow casters are pre-computed. Scenes are then rendered using the pre-computed textures. A first step entails generating sets of directions and associated pre-computed textures for each light source and shadow caster pair in a simulation frame. Next, a first scene in the simulation is rendered. During this step one or more of the pre-computed textures are used to darken the area of influence or shadow portion of the scene.

An object-finder-mounting apparatus comprises: a base for mounting the object-finder-mounting apparatus to an optical instrument; an object-finder-holder assembly coupled to the base and comprising one or more object-finder holders for removably holding an object finder; a projection plate moveably coupled to the base and / or the object-finder-holder assembly for movement between first and second positions; and a shadow-casting member. The object-finder-mounting apparatus is convertible between first and second working modes. In the first working mode, the projection plate is moved to the first position which permits use of the object finder held by the object-finder holders to locate objects. In the second working mode, the object finder is removed from the object-finder holders and the projection plate is moved to the second position. In the second working mode, the shadow-casting member casts a shadow onto the projection plate when the optical instrument is directed toward a luminous object.

A method for aligning optical layers of a multi-layer display includes displaying a dark screen image on each of a plurality of transmissive pixel arrays separated from each other by spacing regions. The transmissive pixel arrays are disposed on a display layer of the multi-layer display. The display layer is illuminated with a plurality of illumination sources of an illumination layer disposed behind the display layer. Each of the illumination sources corresponds to one of the transmissive pixel arrays to illuminate the corresponding one of the transmissive pixel arrays. An illumination pattern is cast onto a screen layer disposed in front of the display layer. The illumination pattern includes bright regions due to overlapping illumination cast from adjacent ones of the transmissive pixel arrays. The bright regions of the illumination pattern cast onto the screen layer are analyzed to identify misalignments between the display layer and the illumination layer.

When planning and setting up wind power installations, the visual detractions to be expected on the part of the wind power installation on the environment play an increasingly important part in approval and acceptance. The shadow casting caused by the wind power installation on the adjoining properties is often perceived by the residents as being very troublesome.A wind power installation is provided by means of which shadow casting regulation is improved. That is achieved by a method of operating a wind power installation wherein a first light intensity is detected in a region of direct light irradiation and a second light intensity is detected in a shadowed region, and wherein the wind power installation is shut down if the difference between the first light intensity and the second light intensity is greater than a predetermined value.

Systems and methods of determining operation parameters for the shadow cast fabrication of micro or nanostructures, the fabrication process using deposition from at least one source over an array of particles, wherein the deposition produces overlapping shadows masking the substrate. A computing device receives a first set of parameter inputs defining particle properties and deposition properties in a shadow cast fabrication, generates data corresponding to a first image for display based on the first set of parameters, receives at least one incremental parameter input that modifies or adds to the first set of parameter inputs, dynamically generates data corresponding to at least one second image for display based on the at least one incremental parameter input, receives an indication that the at least one second image corresponds to a shape ready for fabrication, and generates an output set of fabrication parameters corresponding to the shape ready for fabrication.

A weapon mountable illumination device configured to mount to existing firearm mounting rails to provide illumination of potential targets while mitigating problems associated with snagging, and shadow casting. It is an aspect of the present invention to provide a rapidly mountable device to provide increased lighting capability while obviating the need to remove back up iron sights.

The subject matter discloses a method of determining whether a point in a computerized image is visible from a viewpoint; said image is represented as a point cloud, the method comprising: performing inversion on a the vicinity of the point thus creating a computerized inversed object, each point in the vicinity of the point is related to a parallel point in the computerized inversed object and obtaining a convex hull of the inversed object; the point is likely to be visible from the viewpoint in case it belongs to the point set composing the convex hull. The method is also useful for shadow casting and for determining the location of an image-capturing device within a volume.

The embodiment of the invention provides a conveying device for hollow brick production. According to the conveying device, the number and rate of hollow bricks conveyed into a detection unit can be limited by providing a dividing strip and a dividing plate on a belt body of a first transport mechanism and providing a detection unit at one end of the belt body; a base and a bridge are arranged inthe detection unit, a plurality of photosensitive switches are installed at the top of the inner side of the bridge, a plurality of light sources are installed on the base, the light sources can irradiate the hollow bricks and project shadows to the top of the inner side of the bridge, and then the measurement results of the photosensitive switches reflect whether light is shielded by an object ornot; and by arranging a control part, the intact condition and the void ratio of the hollow bricks are measured through the the measurement results of the photosensitive switches, whether the hollowbricks are qualified or not is judged, the qualified hollow bricks and the unqualified hollow bricks can be conveyed into a second conveying mechanism and a third conveying mechanism through a conveying chain and a push rod, transportation, detection and sorting integration is achieved, manpower and material resources are saved, and the working efficiency is improved.

The invention discloses an indoor shadow projection lamp which comprises a light source plate, a shell base is installed at the bottom of the light source plate, and a first light source, a second light source, a third light source, a fourth light source and a fifth light source are arranged on the front face of the light source plate. Through the combination of the irradiation angle of the LED light sources, the distance between the light sources and the height of the shell base, the overall size of the lamp is greatly reduced, various styles can be changed by changing the shape of the shell, a new technology of a shadow lamp is used for replacing an old laminated shadow effect lamp, and an unexpected attractive effect is achieved, so the indoor design can be played well. By adopting the technology of the lamp, the lamp can be installed on various reflecting surfaces such as ceilings, walls and all places where the lamp can be installed, the light source and the shell are combined into a whole, the shell is irradiated by utilizing the irradiation angle of the light source, and shadows are projected on the reflecting surfaces, so that the lamp is small in size, the safety performance is improved, and the cost is reduced.

An exemplary street lamp for being stalled on the ground includes a light source, a light pervious member and a direction indicator. The light pervious member includes a light incident surface and an opposite light emitting surface for facing the ground. The light source is arranged opposite to the light incident surface. The direction indicator is arranged on the light pervious member for projecting the shadow thereof on the ground to indication a direction at the geographic location of the street lamp.

The invention discloses a groove type photo-thermal power generation tracking light source device based on photosensitive sensors. A group of photosensitive sensors are installed on a parabolic reflector, and the arrangement direction of the photosensitive sensors is perpendicular to the extension direction of a heat collecting tube. When the vertical angle of sunlight deviates from the normal direction of the reflector, the shadow of the heat collecting tube is projected to an upper sensor or a lower sensor in a group of photosensitive sensors on the reflector, and a controller judges the vertical angle of the light source relative to the reflector according to the illumination intensity received by each photosensitive sensor in real time and makes a corresponding instruction. A two-way adjusting motor rotates forwards or backwards to drive the reflector to rotate up and down until the shadow of the heat collecting tube is projected to the photosensitive sensor in the middle again. Through the adjustment, condensed light formed by sunlight reflected by the reflector is always gathered on a heat absorption tube and converted into heat, and maximization of the photoelectric conversion efficiency is achieved.

An object-finder-mounting apparatus comprises: a base for mounting the object-finder-mounting apparatus to an optical instrument; an object-finder-holder assembly coupled to the base and comprising one or more object-finder holders for removably holding an object finder; a projection plate moveably coupled to the base and / or the object-finder-holder assembly for movement between first and second positions; and a shadow-casting member. The object-finder-mounting apparatus is convertible between first and second working modes. In the first working mode, the projection plate is moved to the first position which permits use of the object finder held by the object-finder holders to locate objects. In the second working mode, the object finder is removed from the object-finder holders and the projection plate is moved to the second position. In the second working mode, the shadow-casting member casts a shadow onto the projection plate when the optical instrument is directed toward a luminous object.

A method and system of amplifying output power produced by a solar panel having a shadow cast upon a portion of a surface thereof are presented. The system and method utilize refractive-reflective sheets such as lenticular sheet, and / or diffraction grating sheets to diffuse sunlight to illuminate the shadow and thus amplify the output power of the solar panel. Alternatively, when no shadow is cast upon the panel, the sheets reflect additional sunlight onto the panel increasing its output power. The sheets may be used to refract, reflect, or both refract and reflect sunlight onto the panel. The sheets may be used in combination with bright or reflective panels to reflect additional sunlight onto said panels to further amplify the output. The system and method are applicable to various types of solar panels such as thin film, microcrystalline and polycrystalline solar panels as well as solar roof tiles or other solar radiation collectors.

The invention discloses a shadow display method and device of a house type image, a readable storage medium and electronic equipment. The shadow display method comprises the following steps: determining a light source and a target body in a target area in a house type image; according to the first position information of the light source and the second position information of the target body, determining a shadow area generated when the light source is projected to the target body, and determining a shadow projection texture when the light source is projected to the target body; a shadow projection texture is displayed within the shadow region. According to the technical scheme, the display device can determine the shadow area generated by the target body according to the first position information of the light source in the target area and the second position information of the target body, determines the shadow projection texture according to the intensity of the light source, and displays the shadow projection texture in the shadow area. Meanwhile, when the position relation of the light source or the target body changes, the shadow area and the shadow texture of the target body also change, and the sense of reality of the house type image is improved.