12 results about "Diffuse illumination" patented technology

A split-cadence eye tracking that includes a lower-cadence pipeline that estimates the multiple (e.g., five) degrees of freedom (DoF) position of the eye with respect to the camera / device to estimate gaze, and a higher-cadence, faster pipeline that estimates only the two DoF of rotation of the eye and interpolates from a previous reference frame to estimate gaze. Diffuse lighting may be used to capture images of the pupil for low-cadence frames, and specular lighting may be used to capture images of glints for high-cadence frames.

The present application relates to the technical field of lamps, and provides an explosion-proof hand lamp, which comprises a lamp head assembly and a lamp body assembly; the lamp head assembly comprises a lamp head shell, a lamp plate, a light distribution lens and a light uniformizing cover; lamp grooves are formed in two large faces of the lamp head shell; the lamp plate is arranged in the lamp grooves; the light distribution lens is connected with one large face; and the light uniformizing cover is connected with the other large face, so as to cover the openings of the lamp grooves on two sides. According to the present application, the light distribution lens and the light uniformizing cover are arranged on the two large faces of the same lamp head shell respectively, and the lamp plate has light emitting conditions corresponding to the lamp grooves on two sides at the same time, so that two sets of different light emitting mechanisms are integrated on the same explosion-proof hand lamp: one side can obtain a light beam shaping with more directionality, and the other side can obtain more uniform and soft diffuse illumination; in combination with the hinged adjustable pointing of the lamp head and the lamp body, the operator can switch between different illumination forms and illumination directions according to the needs of the activity environment, so that the problem that the traditional explosion-proof hand lamp has only single light distribution and is difficult to adjust the illumination demand with the change of the environment is solved in structure.

A method for synthesizing a diffused image (S) representative of the appearance of a surface under diffused illumination comprises: a) obtaining at least two directional images (D1, D2, D3) of the surface, each directional image having been acquired along a predefined viewing direction under directional illumination of the surface from a predefined illumination direction; b) for each directional image, determining a plurality of statistical parameters ({A1, n, m}, {A2, n, m}, {A3, n, m}) representative of a statistical distribution of pixel values in the respective directional image; c) predicting a plurality of probability distribution parameters ({Ap, n, m}) representing a predicted probability distribution function of pixel values in the diffusion image using statistical parameters associated with the at least two directional images as predictors, and d) determining pixel values of the diffusion image based on samples from the predicted probability distribution function.

The application discloses a kind of based on machine vision's weld defect mobile scanning device, belong to detection technical field.It includes mobile scanning device and visual scanning unit, transverse sliding groove can adjust camera and light source position left and right, a set of device can cover flat plate welding, pipeline welding and multiple pass welding and multiple working conditions, equipment versatility is better, light source module adopts strip light source and top light source combination arrangement, strip light source is illuminated with low angle side, utilize the texture difference of defect and base material to highlight crack, bite edge profile;Top light source provides high uniformity diffuse illumination, inhibits metal surface specular reflection and glare;Adjusting pivot drives light source support swing, can adjust illumination direction for different bevel angle and surface roughness, shaft end fixed seat is locked after scanning, and will not run position by oneself. Multi-light source cooperation makes image signal-to-noise ratio improve, defect edge is clearer, provides high-quality image source for rear-end machine vision algorithm to identify crack, porosity, incomplete penetration and other defects.

The utility model discloses a multi-point dynamic adjustment type tunnel light source which comprises a working frame, a workpiece positioning unit, a light source assembly and a visual assembly are fixedly arranged on the working frame, and the light source assembly and the visual assembly are located at the positions corresponding to the workpiece positioning unit. The height, the angle and the distance of the two reflecting shells can be adjusted relative to the workpiece, so that the irradiation angle of a light source is adjusted according to different detection requirements and object shapes, the optimal illumination effect is achieved, the visual imaging problem of the metal high-reflection rotary body is solved, and the detection accuracy is improved. According to the invention, a plurality of camera modules can be simultaneously used and X-axis moving working scenes can be handled, and light can be subjected to set reflection and heat dissipation in the reflection cavity, so that a uniform diffuse illumination effect is realized, shadows and light reflection are reduced, a uniform and stable illumination environment is provided for a machine vision system, image information of an object can be accurately acquired, and the visual effect of the machine vision system is improved. And powerful guarantee is provided for machine vision detection.

The present invention comprises: a sample opening (22); a measurement opening (23); an illumination optical system for illuminating a to-be-measured position of a measurement object (100) via the sample opening; and a light-receiving optical system for condensing light to be measured reflected from the to-be-measured position to a measurement unit, wherein either the illumination optical system or the light-receiving optical system includes a colorimeter (2) that is an optical system of diffused light reception or diffused illumination using an integrating sphere (21). In addition to the sample opening (22) and the measurement opening (23), a third opening (26) is provided in the integrating sphere (21). An angle ω formed by a line G2 connecting the center of the third opening (26) and the center of the measurement object (100), and a regular reflection direction G1 of the measurement object (100) with respect to an optical axis G3 of another optical system which is not the optical system using the integrating sphere (21) satisfies 15°<ω.

A multi-functional background illuminator for use with slit lamps is disclosed. The illuminator includes a housing with non-filtered green, blue, and white light-emitting diodes, a rechargeable power supply, an electronic control board, and a rheostat for intensity control. A multi-directional mounting clip attaches the illuminator to a slit lamp tower and permits horizontal and vertical rotation. The green LED enhances visualization of meibomian glands without infrared imaging, the blue LED provides an expanded excitation field for fluorescein dye to improve assessment of tear film and corneal staining, and the white LED supplies wide-field diffused illumination with reduced glare for examination of eyelids, lashes, and conjunctival surfaces. The device extends the diagnostic capabilities of conventional slit lamps by providing wider field illumination and multiple selectable lighting modes in a compact, portable unit.

Information handling system keyboard illumination is provided with micro LEDs disposed below keyboard keys to direct illumination at each key individually. The micro LEDs may be integrated at a bottom surface of a support plate below a keyboard membrane, on top of the support plate within an opening of the membrane or in a spacer layer of the membrane between circuit layers. A diffuser disposed between the micro LED helps to diffuse illumination directed at the key for a more even icon illumination. The diffuser may be integrated with the membrane at an upper circuit layer or over a structure disposed over the micro LED.

A lighted architectural-structure covering is disclosed. In one example of an embodiment, an architectural-structure covering includes a light source arranged and configured to illuminate at least a portion of the architectural-structure covering. The architectural-structure covering may include first and second coverings. The light source is arranged and configured to direct light onto the second covering, which is arranged and configured to reflect, redistribute, etc. the received light toward the interior space of the room in which the architectural-structure covering is located. Thus arranged, the architectural-structure covering may be used to create, for example, diffused-lighting effects.

A split-cadence eye tracking that includes a lower-cadence pipeline that estimates the multiple (e.g., five) degrees of freedom (DoF) position of the eye with respect to the camera / device to estimate gaze, and a higher-cadence, faster pipeline that estimates only the two DoF of rotation of the eye and interpolates from a previous reference frame to estimate gaze. Diffuse lighting may be used to capture images of the pupil for low-cadence frames, and specular lighting may be used to capture images of glints for high-cadence frames.

Systems and methods for reading machine-readable indicia (e.g., barcodes) can include emitting, by a code reading device, a light to illuminate a surface including a machine-readable indicia. The code reading device can capture an image of the machine-readable indicia, and determine whether an image quality parameter of the image of the machine-readable indicia captured by the image sensor satisfies a predefined condition (e.g., no reflections on the machine-readable indicia). Based on a determination that the image quality parameter of the image of the machine-readable indicia does not satisfy the predefined condition, the voltage being applied to the electrochromic component may be adjusted to cause an opacity level of the electrochromic component to be altered. Otherwise, the voltage being applied to the electrochromic component may remain unchanged.