180 results about "Local illumination" patented technology

Methods, apparatuses, and computer-readable medium are provided for a frame rate up-conversion coding mode, where a bilateral matching mode can be used to determine motion information. In various implementations, local illumination compensation is disallowed from being used for a block when a bilateral matching mode is used for the block. In various implementations, a bilateral matching mode is disallowed from being used when local illumination compensation is used for the block.

Techniques and systems are provided for processing video data. For example, video data can be obtained for processing by an encoding device or a decoding device. Bi-predictive motion compensation can then be performed for a current block of a picture of the video data. Performing the bi-predictive motion compensation includes deriving one or more local illumination compensation parameters for the current block using a template of the current block, a first template of a first reference picture, and a second template of a second reference picture. The templates can include neighboring samples of the current block, the first reference picture, and the second reference picture. The first template of the first reference picture and the second template of the second reference picture can be used simultaneously to derive the one or more local illumination compensation parameters.

An image enhancement method and system are provided. The image enhancement method and system are capable of improving image quality by performing gamma corrections on global and local illuminations and reflectance estimated from an input image, in consideration of dynamic range and contrast of the image, respectively. Particularly, in a case of a color image, the red, green, and blue (RGB) component images are converted into hue, saturation, and value (HSV) component images, and the global and local illuminations and reflectance estimated from the V component image. By converting the hue (H), saturation (S), and enhanced value (V) into RGB, an enhanced color image can be obtained.

The invention discloses a face image relighting method, which comprises the steps of: performing face recognition on a two-dimensional face image, and acquiring two-dimensional feature points; performing face three-dimensional reconstruction according to the two-dimensional feature points and three-dimensional face model data, and generating a three-dimensional grid of a three-dimensional face image; carrying out local illumination rendering on the three-dimensional grid according to the illumination rendering parameters and a pre-established illumination model, and generating a first two-dimensional face illumination mapping graph; and performing skin color detection on the two-dimensional face image, and acquiring a two-dimensional face image skin color probability value; performing non-skin-color region protection on the first two-dimensional face illumination mapping graph according to the skin color probability value, so as to obtain a second two-dimensional face illumination mapping graph; carrying out edge extension on a facial contour of the second two-dimensional face illumination mapping graph, so as to obtain a third two-dimensional face illumination mapping graph; and subjecting the third two-dimensional face illumination mapping graph and the two-dimensional face image to relighting fusion, and generating a lighting result map. The face image relighting method provided by the invention is simple, feasible, fast and efficient, and is high in user controllability.

An image processing system for implementing a variant of Retinex algorithm based on local illumination correction is provided to improve an intensity value of each position of an input image. The image processing system provides the ability to distinguish details when compressing dynamic range of a given image. Specifically, first the illumination of the image is estimated by performing a weighted low pass filter (WLPF) operation, and the original image is separated into the illumination and the reflectance images. Next, the estimated illumination is modified by using a non-linear mapping function based on local illumination at each pixel location. Then, the modified illumination image is combined with the reflectance image. Finally, an enhanced image is obtained after a contrast correction procedure.

The present invention relates to a method and system for foreground segmentation in which frames of a video sequence are analyzed in the transform domain to determine one or more features. The features are used to model the background. The background can be modeled as a single Gaussian model with a mean and variance of the features. A current frame is segmented by determining if one or more features of the current frame analyzed in the foreground domain satisfy a threshold between the background model. The threshold value can be based on the mean and/or variance of features. During the segmentation, the mean and variance can be updated based on previous corresponding values and current features to adaptively update the background model. In one embodiment, the frames are divided into a plurality of blocks. A transform is used to analyze the blocks in the transform domain. For example, the transform can be a discrete cosine transform (DCT). The features can be a DC feature comprising the DC coefficient and an AC feature comprising a weighted sum of the AC coefficients. The weighted sum is determined with weights which are varied to emphasize different aspects of the present invention. Additional processing steps can be used to remove false positives, handle sudden global illumination changes, handle sudden local illumination changes and remove false negatives.

An apparatus and method for improving local illumination by a cutting implement, such as scissors or shears and the like. The apparatus includes a pair of cooperating shear bodies rotatably coupled to each other about a pivot for opening and closing movements, each shear body including a blade having a pivot portion surrounding the pivot, a shank, and a finger grip; and an illumination system, coupled to the shear bodies and responsive to a rotational relationship between the shear bodies, for directing illumination into a field-of-view that includes the blades wherein the rotational relationship is established by a switch coupled to the blades.

The invention discloses an overall-optimization lighting source arranging method which includes the following steps. Firstly, minimum intervals among adjacent light sources are calculated out according to four light source lighting models and based on the minimum intervals , a first light source is located and a step size of variation of light source intervals is determined in a lighting space; secondly, according to the step size, the intervals among adjacent light sources are changed and whether an illuminance value of a lighting spatial point corresponding to each installation interval meets lighting design standards of a building or not is determined. If yes, the scheme is judged to be reasonable and changing the intervals among adjacent light sources continues, whether an arrangement scheme of a next installation interval is reasonable or not is determined and eventually the maximum interval value which meets the lighting design standards of the building is selected as the maximum arrangement scheme. Thirdly, a plane graph of the maximum arrangement scheme is drawn and maximum illuminance, minimum illuminance, illuminance uniformity and needed electric energy of the scheme are calculated out. The overall-optimization lighting source arranging method has the advantages of being little affected by subjective factors and taking both a spatial overall situation and partial lighting conditions into consideration and being accurate in calculation.

A light fixture monitoring/control system/method allowing a lamp associated with a lighting fixture to be controlled in response to localized lighting fixture sensor inputs and/or remote wireless commands is disclosed. The system utilizes a light fixture adapter (LFA) as a dimming control and monitoring interface between a light fixture and the lamp installed in the LFA. Dimming control is directed by a computing device based on a LFA program (LFAP) that analyzes information from one or more sensors integrated within the LFA. The LFA supports a web-based browser interface and a wireless communication link allowing remote users to define the LFAP and/or directly control lamp dimming and/or access data from LFA sensors. The LFA permits low-cost retrofitting of existing light fixtures with “smart” networked lighting controls that may incorporate advanced spatially diverse security monitoring functions including audio and/or video surveillance.

The invention discloses a wetland water resource water-quality online detection device in the field of water quality detection. The device comprises a floating platform, a detection box is mounted atthe top of the floating platform in an embedded manner, a processing chip is arranged at the bottom of an inner cavity of the detection box, a filter is arranged on the left side wall of the inner cavity of the detection box, a signal amplifier is arranged on the right side wall of the inner cavity of the detection box, a wireless signal transmitter is arranged at the top of the inner cavity of the detection box, signal lamps are symmetrically arranged on left and right sides of the top of the detection box, and photovoltaic power generation mechanisms are symmetrically arranged on left and right sides of the top of the floating platform. The water-quality online detection device is reasonable in design, the photovoltaic power generation mechanisms have an adjusting function, so that angleof photovoltaic power generation plates can be adjusted according to local illumination angle to enable the photovoltaic power generation plates to better power the detection device; the water-quality detection device is displayed through the signal lamps, so that probability of causing damage to the detection device by ships in water flow can be lowered.

There are provided method and apparatus for local illumination and color compensation without explicit signaling. An apparatus includes an encoder (100) for encoding a picture by enabling at least one of color compensation and illumination compensation of at least one color component of a prediction for an image block of the picture without using explicit signaling. The method comprises at least the step of enabling the encoding of a picture described above in the apparatus (325), again without use of explicit signaling. In the description of a specific embodiment, this enabling of the color compensation and the illumination compensation is based on at least one of a group of pixels and a local signal block corresponding to the picture (330). Similar descriptions are provided for a methodand apparatus for decoding the signal the encoded signal.

A method may include: receiving information regarding a current data block of an image; determining whether Local Illumination Compensation (LIC) is applicable for the current data block; based on determining that the LIC is applicable for the current data block, at least one of: infering an LIC flag for the current data block to be 1 or true corresponding to the LIC being enabled, or inheriting the current block's LIC flag from an LIC flag of a neighboring block; and based on the LIC flag for the current data block corresponding to the LIC being enabled, generate a prediction of at least one sub-block with a derived motion vector by applying LIC to the current data block using the inherited LIC flag.

The invention relates to the technical field of vehicle control, and provides a control method, a control system, electronic equipment and a storage medium of a headlamp, which are applied to a vehicle provided with a light source matrix type headlamp. The control method comprises following steps: in an automatic driving process, when ambient light brightness is lower than a threshold value, the light source matrix type headlamp is turned on; recognizing a lane in front of the vehicle through an obstacle detection sensor, and detecting obstacles in a lane area; when the suspected obstacle is detected, adjusting the irradiation direction of the light source matrix to enable the irradiation range to at least cover the suspected obstacle; identifying suspected obstacles, judging whether the obstacles need to be avoided, and if so, adjusting the driving direction to avoid the suspected obstacles; and if not, adjusting the irradiation direction of the light source matrix to the current driving direction. According to the invention, the focusing area of the light source matrix can be adjusted based on the suspected obstacles in the automatic driving process, so that the local illumination enhancement of the suspected obstacles is realized, the identification of the suspected obstacles is facilitated, and the driving safety is improved.

The invention belongs to the field of image enhancement and computer vision, and particularly relates to a Retinex-based image enhancement method in a dark vision environment, which comprises the following steps: acquiring image data, and dividing the image data into a global illumination image and a local illumination image; carrying out weighted average on corresponding pixel points of the two images to obtain a preliminary estimation illumination image, carrying out edge-preserving smooth filtering on the preliminary estimation illumination image by adopting improved weighted guided filtering, and carrying out improved adaptive Gamma correction on the filtered illumination image to obtain a corrected estimation illumination image; calculating reflection images of an R channel, a G channel and a B channel by adopting a Retinex algorithm and utilizing the original image and the corrected estimated illumination image, and synthesizing the reflection images of the three channels to obtain an enhanced image. Bright area details can be reserved and halo effect can be reduced while images in the dark vision environment are enhanced, excessive enhancement of the images is avoided, and the images in the dark vision environment can be conveniently recognized, detected and the like.

A technology for processing digital signals is provided, and more particularly, a method of encoding or decoding a multiview video sequence based on adaptive compensation of local illumination mismatches between frames of the multiview video sequence is provided. The method may be performed using a correction parameter used to correct a change in illumination. The correction parameter may be computed based on at least one of a first estimate estD_i,j, a second estimate estR_i,j, a value R_i,j of a pixel of a reference block, and values T^D_k and T^R_k of restored pixels.

There is provided a surface light source device capable of making appearance of a boundary between partial lighting areas more natural than related art. In each of unit light-source sections 10 capable of mutually independent lighting, uneven light-emission intensity distributions that are mutually independent are to be formed within a light emission surface. Thus, in the light emission surface of each of the unit light-source sections 10, an arbitrary light-emission intensity distribution is able to be formed. Therefore, by adjusting a light-emission intensity distribution of each of the unit light-source sections 10, the appearance in the boundary between the partial lighting areas becomes more natural than related art.