58results about How to "Increase Brightness Contrast" patented technology

A database includes an identifier and associated parameters for each of a number of faces to be recognized. A new acquired image from an image stream is received potentially including one or more face regions. Face detection is applied to at least a portion of the acquired image to provide a set of candidate face regions each having a given size and a respective location. Using the database, face recognition is selectively applied to at least one of the candidate face regions to provide an identifier for a face recognized in a candidate face region. A portion of the image is stored including the recognized face in association with at least one image of the image stream.

A method of enhancing the tonal and spatial characteristics of a digital image, includes receiving a source digital image including a plurality of pixels; producing a tone scale function that can be used to enhance the tonal characteristics of the source digital image; classifying the tone scale function into one of two or more categories, wherein the classification categories include expansive and compressive; and using the tone scale function, the source digital image, and a first spatial filter to produce an enhanced digital image when the tone scale function has been classified as compressive, and using the tone scale function, the source digital image, and a second spatial filter to produce an enhanced digital image when the tone scale function has been classified as expansive.

The invention discloses an adjustment method of output brightness, an adjustment method of a Gamma curve and a display device. The adjustment method of output brightness includes the following steps that: an image is divided into a plurality of sub images; the gray scale values of each pixel in the sub images are acquired; and the output brightness of each sub image is adjusted according to the gray scale value distribution condition of each sub image. With the adjustment method of the output brightness of the invention adopted, the brightness of a display image can be adjusted regionally, and a display effect can be improved.

A method of enhancing the tonal characteristics of a digital image, includes receiving a source digital image including a plurality of pixels; producing a tone scale function that can be used to enhance the tonal characteristics of the source digital image; classifying the tone scale function into one of two or more categories based on the effect the tone scale function will have on the numerical range of pixel values, wherein the classification categories include expansive and compressive; and using the tone scale function, the source digital image, and a spatial filter to produce an enhanced digital image when the tone scale function has been classified as compressive, and using the tone scale function and the source digital image without a spatial filter to produce the enhanced digital image when the tone scale function has been classified as expansive.

The present invention provides an optical film having a phase difference film, and a polarized film formed on both surfaces of the phase difference film, wherein the polarized film contains at least a polarizer, and the absorption axis of the polarizer is substantially perpendicularly oriented to the polarized film surface. The present invention also provides a glass using the optical film.

The invention discloses a non-contact river surface flow field imaging measuring method and belongs to the technical field of open channel flow measurement. The method comprises the following steps of: firstly, mounting a near-infrared light filter in front of an image sensor to realize near-infrared imaging, and enhancing the brightness contrast between a flow tracer and the water surface background; secondly, carrying out airspace high-pass filtering on an image, and restraining optical noises of the water surface; thirdly, carrying out motion vector estimation by a fast Fourier cross-correlation algorithm to obtain displacement vectors of each analyzed area; fourthly, reestablishing a time average flow field by a method based on space-time federal filtering; and fifthly, carrying out normal incidence correction on flow rate vectors by a direct linear transformation method to realize the calibration and the visualization of the flow field. The non-contact river surface flow field imaging measuring method can be stably and reliably applied to river surface flow field measuring under complex water surface optical environments.

The present invention aims at suppressing a noise in a low luminance part and a high luminance part and, at the same time, realizing a high contrast of the parts, and realizing high contrast of a characterizing part of the image as well. The image signal processing is provided with: a first area input-output characteristics control unit which controls change of input-output characteristics for every arbitrary areas, associated with a value of an input luminance signal; a second area input-output characteristics control unit which controls change of input-output characteristics for every arbitrary areas, associated with an output of the first area input-output characteristics control unit; and a chrominance input-output characteristics control unit which controls change of the input-output characteristics of an input chrominance signal, utilizing the output of the first area input-output characteristics control unit and the output of the second area input-output characteristics control unit.

A kitchen container make of flexible material (such as a silicone elastomer) for culinary applications. The flexible material is capable of being deformed into different positions befitting different uses, in particular cooking in a microwave and in a conventional oven. Opposite openings separated by portions of two sides of a perimetric wall of the kitchen container facilitate air circulation and partial retention of vapours while cooking.

Provided is an apparatus and method for enhancing an image by optimizing exposure and grayscale. The apparatus includes a component-extracting unit separating luminance signals and color signals from input image signals; a luminance-enhancing unit enhancing the luminance of the luminance signals; and a contrast-enhancing unit dividing the luminance signal having the enhanced luminance into one or more local areas, and enhancing the contrast of the luminance signal having the enhanced luminance for each local area.

The invention provides a display substrate, a manufacturing method thereof and a spliced display device. The display substrate comprises: a plurality of substrate base plates which are spliced to formthe display substrate; a plurality of light-emitting chips arranged on one side of the substrate base plate; a reflection retaining wall arranged between any two adjacent light-emitting chips; and afirst black matrix layer arranged on the surface, far away from the substrate, of the reflection retaining wall. According to the display substrate, the reflection retaining wall is arranged between any two adjacent light-emitting chips, so that the problem of large-view-angle color cast is solved, the light efficiency of the light-emitting chips is improved, the first black matrix layer is additionally arranged on the upper surface of the reflection retaining wall, reflection of the reflection retaining wall to ambient light is weakened, the brightness contrast ratio is improved, and the display effect is better.

The vehicle is equipped with a front window having a light transmission characteristic and separated into a first area and a second area provided below the first area, wherein a boundary between the first area and the second area is provided so that a looking-down angle from a driver is constant.

A refraction projection apparatus with filtering film comprises a display unit; a refractor set to polarizedly refract the passing or reflected light from the display unit; a filtering film close to the refractor set; a virtual image forming set to reflect or refract the light source through the refractor set and form reflection light into a virtual image; the refractor set is located between the display unit and virtual image forming set; the refractor set is at an angle Y with the display unit, which is more than zero and less than ninety degrees.

The invention discloses a method for realizing the displaying of high dynamic luminance range images by a plurality of projecting cameras. The method comprises the following steps: firstly, the position, the projecting angle and the display size of each projecting camera is adjusted to ensure that the projection display regions of all the projecting cameras on a screen have an overlap region; secondly, all sub controllers synchronistically receive high dynamic luminance range images, conducting coordinate conversion and color conversion on each pixel of the received images, and then synchronistically transmitting the processed images to the controlled projecting cameras; thirdly, a main controller is used for controlling all the sub controllers to synchronously receive the high dynamic luminance range images, and synchronously transmit the processed images to the controlled projecting cameras. The method has the advantages that the projecting lumen and the projecting luminance contrast can be improved, the black level can be better shown, and HDR images can be displayed by projecting, namely, the color value which exceeds the common range (0 to 255) can be displayed by projecting so as to ensure that the projecting image is full of sense of reality on the aspects of deepness, detail and color and the like.

The invention discloses a low-illumination image enhancement method based on local contrast stretching, and belongs to the technical field of image enhancement. According to the method, the problem that the quality of the obtained enhanced image is poor due to the fact that image details, textures and sharpness of the enhanced image cannot be guaranteed by adopting an existing method is solved. According to the invention, the method comprises the steps: stretching the local contrast of the image, so that the texture, details and definition characteristics of the output image are improved; secondly, designing a segmented global gray mapping method for calculating an initial value of an iterative process, thereby improving the global brightness contrast of the enhanced image. Experimental results prove that the image enhancement algorithm designed by the invention can effectively improve the image quality and enhance the brightness contrast of the image, and image details are very suitable for human eye observation. The method can be applied to enhancement of low-illumination images.

The invention discloses a water surface target motion detecting method simulating a compound eye visual mechanism and polarization imaging. The water surface target motion detecting method comprises the three steps of polarization image collecting calculating, bionic target detecting and bionic motion target matching. The bionic method simulating the dragonfly compound eye visual mechanism is adopted to realize water surface target detecting and tracking, and during the calculating process, scene and target information is converted to 'compressive sensing' features with an impulse sequence as formal representation. Later target detecting and target matching tracking are both conducted based on the impulse sequence, multiple targets in a scene are detected, matched and tracked by the utilization of response time sequences of impulses and impulse sequence modes of the impulses, and at last detecting of target motion and estimation of motion vectors of the target motion are realized. The water surface target motion detecting method can be used in water surface target motion detection under a complex water surface optical environment stably and reliably and calculating efficiency is high.

A method for realizing embroidery simulation which can be used as an alternative sample to an actual object. A shade is added to a stitch not to brighten the center of the stitch and to darken the opposite ends thereof as shown at (a) but to brighten a stitch A close to a light source most and to darken a stitch B remote from the light source most as shown at (b). Assuming that the light source is not located on a two-dimensional plane where the stitch exists but a light beam enters obliquely from the upper space, variation of shade is also added in the widthwise direction of a yarn similarly to the longitudinal direction thereof in order to impart three-dimensional feeling thus attaining a simulation image having highly massive feeling.

A method of and an apparatus for image enhancement taking ambient illuminance into consideration. The image enhancement method includes calculating an original-luminance contrast which is a luminance contrast with respect to an original-luminance of pixels forming an original image, calculating a fade-luminance by reflecting the variation of perceived luminance based on an ambient illuminance into the original-luminance, calculating a defade-luminance by converting the fade-luminance to maintain the original-luminance contrast, and calculating a display-luminance by reflecting the variation of perceived luminance by the ambient illuminance into the defade-luminance. Improving luminance contrast through adjustment of luminance based on ambient illuminance, effectively reduces the fade phenomenon.

A method for realizing embroidery simulation which can be used as an alternative sample to an actual object. A shade is added to a stitch not to brighten the center of the stitch and to darken the opposite ends thereof as shown at (a) but to brighten a stitch A close to a light source most and to darken a stitch B remote from the light source most as shown at (b). Assuming that the light source is not located on a two-dimensional plane where the stitch exists but a light beam enters obliquely from the upper space, variation of shade is also added in the widthwise direction of a yarn similarly to the longitudinal direction thereof in order to impart three-dimensional feeling thus attaining a simulation image having highly massive feeling.

The invention discloses a highway tunnel illumination system and method, and belongs to the field of highway traffic engineering facilities. The system comprises a luminance monitor, a vehicle monitor, a controller, a plurality of illumination lamps and a visibility monitoring module. The luminance monitor is arranged at the position of an entrance of a highway tunnel. The vehicle monitor is arranged at any position of the highway tunnel. The illumination lamps are arranged in the highway tunnel. The visibility monitoring module is arranged in the highway tunnel. The luminance monitor, the vehicle monitor, the illumination lamps and the visible monitoring module are all connected with the controller. The luminance monitor is used for obtaining luminance outside the highway tunnel and sends of the luminance to the controller. The vehicle monitor is used for obtaining the traffic flow in the highway tunnel and sending the traffic flow to the controller. The visibility monitoring module is used for obtaining the visibility in the highway tunnel and sending the visibility to the controller. The controller is used for controlling the working states of the illumination lamps.

The invention relates to an elevator system and also to a method for presenting information during a run with an elevator. In the method, the interior lighting of an elevator car is dimmed during a run sequence of the elevator car, and also information is presented inside on an illuminated display in the elevator car when the interior lighting of the elevator car has been dimmed.

A refracting image display apparatus comprises an image refracting model set which is composed of at least one display unit and light source , a refracting set and a virtual image forming set; a function control unit which is connected through first signal line and sends signals into the image refracting model set; a wireless signal receiving unit which is connected with function control unit through second signal line; a wireless remote control unit which sends wireless signals with one function to the wireless signal receiving device through wireless remote control device; the refracting set is located between the virtual image forming set and display unit to polarizedly refract or reflect light from display unit; the virtual image forming set is used to reflect or refract lights through the refracting set and form the reflecting light into a virtual image; the angle Y between display unit and refracting set is more than zero and less than ninety degrees.

To allow a better determination of an image of a different luminance dynamic range (in particular as characterised by a different maximum luminance a.k.a. peak brightness) than an input image, the present application teaches several variants of a luminance processor (501) arranged to calculate an output luminance of a pixel of an output image (Im_LDR; Im3000 nit) having a second luminance dynamic range characterized by a second peak brightness (PB_LDR; PB_MDR) from an input luminance of a spatially collocated pixel of an input image (MAST_HDR) having a first luminance dynamic range characterized by a first peak brightness (PB_HDR), characterized in that the luminance processor comprises: a gain calculation unit (514) arranged to calculate a multiplication factor (gL) being a function of the input luminance and a luminance mapping function (FLM); a maximum calculation unit (601) arranged to calculate a strength value (V) which is the maximal one of the three red, green and blue color components of the color of the pixel of the input image, wherein those components are either linear red, green and blue color components or a power of those linear red, green and blue color components; an overflow calculator (602) arranged to calculate an overflow measure (T) indicating how close to the upper gamut boundary the output luminance is; a gain factor modification unit (603) arranged to determine an alternative gain factor (Fl(gL)) in case the overflow measure is larger than a threshold (G), and arranged to keep the original gain factor otherwise, and arranged to output one of those as a final gain factor (gF); and a multiplier (530) to multiply the input color (R′G′B′_nrm) by the final gain factor (gF) to obtain an output color (R′G′B′_HDR) having the output luminance.

A liquid droplet measurement method and a liquid droplet measurement device with which the luminance contrast can be improved without making changes in, for example, the numerical aperture (NA) of a lens when the quantity of reflected light from the surface of the measurement target liquid droplet alone cannot provide a sufficient luminance contrast. A method and an apparatus for manufacturing a device are also provided. The liquid droplet measurement device includes: a measurement table having a surface with a recess and for holding a translucent sample substrate; an imaging section that applies light onto the sample substrate having formed thereon a liquid droplet, and measures quantities of reflected light from the sample substrate and the liquid droplet; and a measurement control unitthat determines a volume or a surface shape of the liquid droplet using luminance information of the reflected light quantities measured by the imaging section, wherein the thickness of the sample substrate is greater than the wavelength of the light and is less than the focal length of the liquid droplet.

The invention discloses a road tunnel lighting system and method, and belongs to the field of road traffic engineering facilities. The system comprises a brightness monitor, a vehicle monitor, a controller, multiple lighting lamps and a visibility monitoring module. The brightness monitor is arranged at the entrance position of a road tunnel. The vehicle monitor is arranged at any one position of the road tunnel. The multiple lighting lamps are respectively arranged in the road tunnel. The visibility monitoring module is arranged in the road tunnel. The brightness monitor, the vehicle monitor, the multiple lighting lamps and the visibility monitoring module are respectively connected with the controller. The brightness monitor is used for acquiring external brightness of the road tunnel and transmitting brightness to the controller. The vehicle monitor is used for acquiring vehicle flow in the road tunnel and transmitting vehicle flow to the controller. The visibility monitoring module is used for acquiring visibility in the road tunnel and transmitting visibility to the controller. The controller is used for controlling the working state of the multiple lighting lamps according to brightness, vehicle flow and visibility.

The vehicle is equipped with a front window having a light transmission characteristic and separated into a first area and a second area provided below the first area, wherein a boundary between the first area and the second area is provided so that a looking-down angle from a driver is constant.

An anti-interference touch display panel comprises a color filter substrate, an active matrix transistor substrate, a display functional layer, a plurality of touch-sensing units and at least one first anti-interference spot. The active matrix transistor substrate is disposed corresponding to the color filter substrate. The display functional layer is disposed between the color filter substrate and the active matrix transistor substrate. The touch-sensing units are coplanarly disposed on the color filter substrate, and a first interval region is formed between the adjacent-touch sensing units. The first anti-interference spot is disposed within the first interval region.

The invention discloses an image contrast improvement method for a paper-like display. The method comprises the following steps: carrying out the video shooting of electrophoresis electronic paper, and screening out a video with electrophoresis electronic paper severely interfered by light noise; framing the video into a picture and intercepting and storing an image of a middle area; converting the image into a grey-scale map; carrying out homomorphic filtering processing on the grey-scale map; calculating a brightness average value of the processed map, and drawing a brightness change curve graph of the image. According to the invention, homomorphic filtering is used to denoise the electrophoresis electronic paper image influenced by the light noise, the noise reduction effect is remarkable, the brightness contrast of the image is enhanced, the authenticity and the accuracy of obtained electrophoresis electronic paper image content can be ensured; and the method can predict the subsequent video brightness by observing the brightness change curve of the image, so that the filtering threshold value can be conveniently and quickly found out, the situation that an obtained image doesnot meet the requirement due to improper setting of certain values can be avoided, and the reliability of image content is further improved.