30 results about "Lightness" patented technology

A composition of foundation type comprising, in a physiologically acceptable medium, at least one coloring agent, the composition being capable, when it is applied to dark skin, of producing a positive lightness variation ΔL* of between 0.5 and 4 and a positive saturation variation ΔC* of between 0.5 and 4.

The invention provides a mixed-light-source liquid-crystal projection light engine system. The portable liquid-crystal projection light engine system is composed of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a high-brightness laser, an incoherent LED (Light-Emitting Diode) solid light source, a fluorescent device and the like. The output brightness of the projection system is greatly increased, the light source module is safe and environmentally friendly, and projected images have bright color and clear quality. The polarized light management module consists of a color-combining prism, a polarization beam splitter (PBS), a polarization color-combining device and the like, and different polarization states of three-primary-color mixed light are integrated into the same polarized light to be emitted to the image signal module. The image signal module is a monolithic reflection type liquid crystal light modulation device, and image signals are loaded to the three-primary-color polarized light in sequence according to the image signals corresponding to primary colors. The projection lens is used for projecting the light carrying the image signals onto a screen.

The image quality correcting circuit according to the present invention is made up of a mean value computer 10 for computing the mean value of the luminance levels of every plural picture element of a video signal inputted to a video signal input terminal 12, an occurrence frequency counter 13 for counting the occurrence frequency data of plural luminance levels computed by the mean value computer 10, a linear interpolator 15 for forming a correcting characteristic line based on the output points of the counted value from the occurrence frequency counter 13, and an image quality corrector 16, and wherein the linear interpolator 15 provides the correcting characteristic line consisting of a linearly interpolated series of continuous segments, which are obtained by sequentially connecting the luminance levels of an x-axis and the occurrence frequencies on a y-axis, and the image quality corrector 16 corrects the video signals inputted from the video signal input terminal 12 according to the linearly interpolated correcting characteristic line.

The invention discloses a backlight brightness adjustment method and system for mobile terminals. The backlight brightness adjustment method includes: setting a first control strip and a second control strip which are used for adjusting backlight brightness in a display screen of the mobile terminals in advance; calculating backlight brightness values according to toughed positions on the first control strip and the second control strip when detecting that the first control strip and the second control strip are touched simultaneously; correspondingly adjusting the backlight brightness of the mobile terminals according to the backlight brightness values. The backlight brightness is adjusted by the arrangement of the two control strips, so that adjustment precision of the backlight brightness of the mobile terminals is higher, fine adjustment on the backlight brightness is realized, and great convenience is brought to users.

Occurrence of mosquito noise of a macro block that contains even a small plain region is suppressed. One macro block is subdivided into sub blocks each of which is composed of four pixelsxfour lines. The average value of luminance levels of each sub block is calculated. The absolute values of the difference values between the luminance levels and the average value are obtained for each sub block. The minimum value of the average difference values of the 16 sub blocks of one macro block is selected and decided as an activity of the macro block. Corresponding to the decided activity, a quantizer scale of the macro block is decided. With the decided quantizer scale, the macro block is quantized. According to this method, since the size of each sub block is smaller than the size of a conventional sub block of eight pixelsxeight lines, the average difference value of each sub block is more emphasized. Since the minimum value of the average difference values is designated as an activity of the macro block, an activity of a macro block that contains even a small plain portion can be more suppressed. As a result, a quantizer value of a macro block that contains an edge can be decreased. Thus, mosquito noise of a macro block that contains an edge portion of a picture can be suppressed.

A backlight unit, comprising plural linear light sources, and an optical functional sheet, wherein a prism structure having plural prisms is formed on at least one surface of the optical functional sheet, and the values of (H_n−1+H_n)/(A_n−A_n−1) are approximately equivalent, wherein, in a brightness distribution graph that expresses a brightness distribution in the optical functional sheet, A₁ is a peak site and H₁ is a peak height of a first virtual image, A₂ is a peak site and H₂ is a peak height of a second virtual image adjacent to the first virtual image, . . . , A_n is a peak site and H_n is a peak height of (n)th virtual image adjacent to (n−1)th virtual image, and these virtual images are derived from the plural linear light sources.

The invention discloses a gray-scale brightness curve correction system and method. The method comprises the following steps that an environmental light brightness background value scattered by a displayer is acquired by utilizing a brightness measurement module through the environmental conditions so that the maximum and minimum gray-scale brightness of the displayer under environmental light is measured and standard gray-scale display output is calculated, a nonstandard DICOM curve imported to the displayer can be calculated by removing environmental light brightness, and curve output of different environmental conditions is judged and scheduled through output of an environmental light sensor. The curve meeting the standard requirements can still be measured at the observation end of the medical professional displayer under the influence of environmental light so that image distinguishing capability of doctors can be enhanced.

A water-based ink set for ink-jet recording is provided which is capable of: reducing graininess in a low-density printed part in a cyan direction without reducing the color reproduction range in the cyan direction in a high-density printed part; extending the color reproduction range in a blue direction and/or a green direction; improving the vividness of the blue color and/or the green color; and improving gas resistance in a printed part in the cyan direction. The water-based ink set for ink-jet recording includes a cyan pigment ink employing pigment as a coloring agent and a blue dye ink employing dye as a coloring agent and/or a green dye ink employing dye as a coloring agent. The cyan pigment ink is a light cyan pigment ink having a lightness (L*) of about 60 or more in the L*a*b* colorimetric system.

The invention provides a detection method for detecting an infrared weak and small target. The method comprises the steps of background suppression: suppressing the background of a target by utilizing brightness contrast significance-based radiation energy characteristics and the isotropic characteristics of a fan-shaped Gaussian differential filter; track extraction: extracting the movement track characteristics of the target by utilizing an inter-frame difference method and a constant false alarm rate threshold value segmentation method; and result output: according to the movement track continuity of the track, obtaining a final detection result. The invention further provides a detection system for detecting the infrared weak and small target. Based on the technical scheme of the invention, the directional characteristics, the energy characteristics and the movement characteristics of the ground observation image of a sky-based satellite are comprehensively analyzed. Therefore, the interference on various complex false alarm sources on the ground surface is effectively weakened. The false alarm rate of the detection is reduced, and the robustness of the algorithm is enhanced. Moreover, the calculation is simple and efficient, and the real-time performance is high. The method and the system can be conveniently realized on a hardware platform.

An electronic device having a display unit, an indicator, an illuminance sensor and a controller is provided. The indicator is configured to be turned on for emitting light and to be turned off. The illuminance sensor is configured to sense ambient illuminance. The controller is connected to the display unit, the indicator and the illuminance sensor. The controller is configured to turn on and off the indicator. The controller is configured to set brightness of the display unit depending on a value of the ambient illuminance sensed by the illuminance sensor while the indicator continues to be off.

An imaging apparatus includes: determination means for determining whether a capture image is a frontlit image or a backlit image; detecting means for detecting a flesh-color area in the capture image; calculation means for setting weights, in a luminance histogram on the flesh-color area, on luminance of pixels included in a high-luminance area having a relatively high luminance value and luminance of pixels included in a low-luminance area having a relatively low luminance value in accordance with the determination result, and calculating modified luminance produced by modifying luminance on the flesh-color area on the basis of the weights; and correcting means for correcting brightness of the capture image on the basis of the modified luminance.

The invention discloses a background modeling method based on a brightness and texture infusion threshold value. The method comprises: a brightness and texture fusion threshold value is calculated; with a VIBE algorithm, all pixel points at one frame of image are classified into two types: foreground pixels and background pixels; Gaussian mixture modeling is carried out on pixel points with changing brightness in a new image frame; and then a threshold value corresponding to each pixel point is updated. According to the method, because the texture and color brightness are fused to form a threshold value and advantages of the Gaussian mixture model and the VIBE algorithm are combined, the background can be extracted accurately under the circumstance that several kinds of external disturbances like an illumination change, slight camera shaking, a dynamic background element exist, the influence on the real moving target by shadows can be suppressed to a certain extent, the anti-interference capability is enhanced, the image frame processing is accelerated, and the moving target segmentation precision is improved effectively.

According to the present invention, firstly multiple reference parameter values of each color sample in a color chart are set, or a photograph and a measurement are performed on a standard color chart or a user-defined color chart in a certain standard lighting environment, multiple reference parameter values, SPD (λ)×R (λ) and brightness of each color sample are obtained. Then the SPD (λ)×R (λ) and the brightness of each color sample are reproduced by using a spectral tunable lighting source. Then each reproduced color sample is photographed by using the camera under the same settings to obtain multiple reproduced parameter values of each color sample. The two groups of parameter values are compared and a color calibration model is established. Finally color calibration of each batch of camera modules is implemented without the helping of a color chart and standard lighting environment. The present invention has the characteristics of high automation degree, high flexibility and adaptability, and high convenience in color changing and color sample calibrating, and thus has an extremely high practical value.

The invention relates to a method for the dynamic regulation of projection and a projection display device. The technical problem to be solved by the invention is to provide the method for the dynamic regulation of projection. The method for the dynamic regulation of projection is suitable for a projection display device which is used for displaying output images and comprises a light source, wherein the light source is driven by pulse periodic signals. The method for the dynamic regulation of projection comprises the following steps of: (a) judging brightness parameters of the output images; (b) regulating the pulse periodic signals according to the brightness parameters; and (c) driving the light source by using the pulse periodic signals.

The invention relates to a videodisc center positioning method according to fundus image edge information and brightness information. The method comprises the steps of preprocessing a fundus image; extracting a vertical edge image and a horizontal edge image of the fundus image after contrast reinforcement by means of an Isotropic Sobel operator, performing positioning for obtaining a horizontal coordinate of the videodisc according to an edge difference curve; extracting a blood vessel density characteristic and a videodisc brightness characteristic; defining a product of the blood vessel density characteristic and the videodisc brightness characteristic as a comprehensive characteristic value of the vertical coordinate, and obtaining a comprehensive characteristic value curve which is related with the vertical coordinate, wherein the coordinate which corresponds with the maximum value on the curve is the vertical coordinate of the videodisc. The videodisc center positioning method has an advantage of high positioning accuracy.

The invention relates to a lamp control method, device and system. The method is characterized in that ambient brightness data and ambient temperature data of the environment where a lamp is located can be collected, the lamp is adaptively adjusted to work with the corresponding brightness according to the ambient brightness data, and the lamp is controlled for emitting the corresponding light hueaccording to the change of the ambient temperature, so lighting requirements of users in different temperature environments are met. The method is advantaged in that the lamplight brightness and thelamplight hue can be adjusted in a self-adaptive mode according to the temperature and the brightness of the environment where the lamp is located, the basic illumination requirement of a user can bemet, an illumination environment capable of outputting different lamplight hues according to different temperatures can be provided for the user, and high illumination reliability is achieved.

An image processing apparatus that is capable of applying suitable contour correction even to an object in a luminance range where gradation is corrected. A gradation correction unit performs a gradation correction process to an image obtained as a result of photographing. A contour correction unit performs a contour correction process that corrects a contour of an object in the image. A detection unit detects a luminance range where the gradation correction unit performs the gradation correction process in the image. A suppression unit suppresses the contour correction process in the luminance range that is detected by the detection unit when the contour correction unit performs the contour correction process.

A black film containing a thermoplastic resin (A) that contains two or more types of dyes other than black, where a thickness T is 45 to 550 μm, a total concentration C of the dyes other than black is 0.4 to 5 mass % with respect to the thermoplastic resin (A), the total concentration C of the dyes and the thickness T satisfy the following expression (1):

C×T≥210  (1)

• • where in a L*a*b* color system measurement compliant with HS Z 8781-4, L* (lightness) is no more than 10, an absolute value of a* is no more than 2.0, and an absolute value of b* is no more than 2.0, and a total light transmittance obtained after the black film is stretched twofold in one axial direction at a temperature higher than a glass transition temperature by 20° C. is no more than 3.0%.

The invention adopts (TaC + NbC) combined trace elements to improve the red hardness of a product, so a cutter has the advantages of high red hardness, good wear resistance, and no point folding or tipping of a cutter point under a high temperature cutting condition. The matching of a WC material belongs to a thick-thin-matched mixed crystal structure, so the high lightness and the high hardness are realized, and a problem that the high strength and the high hardness of cemented carbide cannot coexist is solved.

The embodiments of the invention disclose a semiconductor laser backlight module and a liquid crystal display. The semiconductor laser backlight module includes a laser light source module, an opticalfiber light homogenizing module, an optical fiber output module and a light guide plate. The laser light source module includes multiple sub-light source groups for outputting a white laser that meets a preset light brightness and a target color temperature value. Sub-optical fiber bundle groups of the optical fiber output module receive white sub-light beams after light homogenizing by the optical fiber light homogenizing module of the corresponding sub-light source groups, form output light beams of adjacent optical fibers from different sub-light source modules and optical fiber output endfaces which are arranged in a line-shaped manner according to a preset optical fiber arrangement mode, and finally are performed butt joint optical coupling with the light guide plate. The semiconductor laser backlight module and the liquid crystal display solve the problem of poor color expression of an LED backlight module, greatly improves the uniformity of the laser backlight illumination inthe light guide plate, significantly reduces interference fringes and speckle effect, and is of great significance for promoting the popularization of the laser liquid crystal display technology.