531 results about "Color balance" patented technology

A method for determining the presence of a face from image data includes a face detection algorithm having two separate algorithmic steps: a first step of prescreening image data with a first component of the algorithm to find one or more face candidate regions of the image based on a comparison between facial shape models and facial probabilities assigned to image pixels within the region; and a second step of operating on the face candidate regions with a second component of the algorithm using a pattern matching technique to examine each face candidate region of the image and thereby confirm a facial presence in the region, whereby the combination of these components provides higher performance in terms of detection levels than either component individually. In a camera implementation, a digital camera includes an algorithm memory for storing an algorithm comprised of the aforementioned first and second components and an electronic processing section for processing the image data together with the algorithm for determining the presence of one or more faces in the scene. Facial data indicating the presence of faces may be used to control, e.g., exposure parameters of the capture of an image, or to produce processed image data that relates, e.g., color balance, to the presence of faces in the image, or the facial data may be stored together with the image data on a storage medium.

An apparatus and method are described for adjusting the color balance of a display. According to the method, a sensor of the apparatus detects the color temperature of ambient light. A controller of the apparatus adjusts the color balance of the emissive display based on the detected color temperature of ambient light.

The present invention provides a system and method for generating light using light-emitting elements and detecting the intensity and spectral power distribution of light using the same light-emitting elements as spectrally sensitive photodetectors. The light-emitting elements function in two modes, an ON mode and an OFF mode, wherein in the ON mode the light-emitting elements are activated and emit light of a particular frequency or range of frequencies. When in the OFF mode, the light-emitting elements are deactivated, wherein they do not emit light but serve to detect photons incident upon them thus generating an electrical signal representative of the intensity and spectral power distribution of the incident photons. The detected signal from the deactivated light-emitting elements can be used to provide photonic feedback to a lighting system, and thereby may be used to control the brightness and color balance of the lighting system. In addition, the light-emitting elements may be arranged such that no spectrally selective filters or optics are necessary to block or focus light onto the light-emitting elements when in the detection or OFF mode.

A method of generating one or more new spatial and chromatic variation digital images uses an original digitally-acquired image which including a face or portions of a face. A group of pixels that correspond to a face within the original digitally-acquired image is identified. A portion of the original image is selected to include the group of pixels. Values of pixels of one or more new images based on the selected portion are automatically generated, or an option to generate them is provided, in a manner which always includes the face within the one or more new images. Such method may be implemented to automatically establish the correct orientation and color balance of an image. Such method can be implemented as an automated method or a semi automatic method to guide users in viewing, capturing or printing of images.

The present invention provides a system and method for generating light using light-emitting elements and detecting the intensity and spectral power distribution of light using the same light-emitting elements as spectrally sensitive photodetectors. The light-emitting elements function in two modes, an ON mode and an OFF mode, wherein in the ON mode the light-emitting elements are activated and emit light of a particular frequency or range of frequencies. When in the OFF mode, the light-emitting elements are deactivated, wherein they do not emit light but serve to detect photons incident upon them thus generating an electrical signal representative of the intensity and spectral power distribution of the incident photons. The detected signal from the deactivated light-emitting elements can be used to provide photonic feedback to a lighting system, and thereby may be used to control the brightness and colour balance of the lighting system. In addition, the light-emitting elements may be arranged such that no spectrally selective filters or optics are necessary to block or focus light onto the light-emitting elements when in the detection or OFF mode.

Separate leads and a common lead are provided on the upper and lower surfaces of a substrate. A plurality of LED elements are disposed in an array on the common lead on the upper surface of the substrate. The common lead provided on the upper surface of the substrate is connected to the common lead provided on the lower surface of the substrate through through-hole plating. Heat generated from the plurality of LED elements is transferred through the common lead provided on the upper surface of the substrate and the through-hole plating to the common lead provided on the lower surface of the substrate and is released therefrom into the air. By virtue of this construction, an light emitting device can be realized in which heat radiating properties are homogenized, heat radiation efficiency is improved, and a compact structure is obtained and, thus, the color balance is improved and unfavorable phenomena such as lowering in the output of light emitting elements and shortening of the service life are avoided.

A method of generating one or more new spatial and chromatic variation digital images uses an original digitally-acquired image which including a face or portions of a face. A group of pixels that correspond to a face within the original digitally-acquired image is identified. A portion of the original image is selected to include the group of pixels. Values of pixels of one or more new images based on the selected portion are automatically generated, or an option to generate them is provided, in a manner which always includes the face within the one or more new images. Such method may be implemented to automatically establish the correct orientation and color balance of an image. Such method can be implemented as an automated method or a semi automatic method to guide users in viewing, capturing or printing of images.

A color image display device is provided which is capable of displaying an image with no differences in color balance between end portions and inner portions of anon-rectangle image display region. The color image display device includes an end portion unit pixel formed in an edge portion of a display region in which a color image is displayed and including end portion sub-pixels which correspond to a plurality of kinds of primary colors respectively in a one-to-one relationship and an inner unit pixel formed in an inside of the display region with respect to the end portion unit pixels and including inner sub-pixels which correspond to the plurality of kinds of primary colors respectively in a one-to-one relationship. With such a configuration, a relative area proportion of the end portion sub-pixels that correspond to the primary colors respectively in a one-to-one relationship is set equal to that of the inner sub-pixels that correspond to the primary colors respectively in a one-to-one relationship. The plurality of kinds of the end portion sub-pixels is arrayed in accordance with a position or a shape on an outer edge of the display region, an array direction of the plurality of kinds of the end portion sub-pixels and an array direction of the plurality of kinds of the inner sub-pixels configured to intersect each other.

A system and related techniques generate and present a set of linked, dynamically interactive image processing controls for image editing and optimization tasks. In embodiments a user interface may present a set of global editing modes such as color manipulation, exposure correction or others. Each mode may contain a hierarchical set of basic, intermediate and advanced controls such as one-button automatic fixes, color or saturation sliders or editable histograms or other curves. When a user wishes, for instance, to achieve a warmer color balance or perform other color-correction tasks, the system may automatically detect adjustments in one or more parameters, such as CMYK values, and automatically adjust the values of other parameters to enhance the intended correction or action. For instance when the magenta content on a CMYK slider is increased, the color saturation may be slightly increased or color temperature may be slightly raised, to create a warmer appearance in the color cast of the image. Other combinations of image parameters may be linked. According to embodiments, a set of editable curves such as histograms or gamma curves may be dragged or otherwise adjusted or manipulated by users, and saved for re-application to other images or at other times.

An electronic endoscope system includes a video scope having a solid-state image sensor for successively producing a frame of color image-pixel signals, and an image-signal processor for producing a color video signal based on the frame of color image-pixel signals. A calculation system calculates a difference value between a value of a central single-color image-pixel signal and an average of values of one selected from single-color image-pixel signals surrounding the central single-color image-pixel signal. A color-balance alteration system alters the value of the central single-color image-pixel signal based on the difference value calculated by the calculation system. A selection system performs the selection of the circumferential image-pixel signals such that the circumferential image-pixel signals to be selected are farther from the central image-pixel signal, as a spatial frequency of an endoscope image to be reproduced based on the color video signals is lower.

A color balancing circuit for a flat panel display such as an electroluminescent display generates a primary current that can be varied to adjust the overall brightness of the display. Three currents related to the primary current by selectable ratios are generated, by current mirror circuits, for example; the ratios can be individually varied to adjust the color balance. Driving currents are generated from the three adjusted currents, by mirroring the adjusted currents, for example, and are used to drive display elements that emit light in the three primary colors. Image brightness and color balance can accordingly be adjusted separately, even though both are adjusted by adjusting the driving current. Circuit size is reduced in that the same primary current is used for all three primary colors.

Methods and apparatuses for automated conversion of color images to aesthetically enhanced gray scale images. In one embodiment, the mix of color channels of a color image is automatically determined as a result of analysis of the image for the generation of a gray scale image. In one example, the data of a color channel (e.g., Blue) that is not suitable for a gray scale representation is not used. The adjustment strength depends on the image itself. In one example, a stronger color channel is automatically weighted less than a weaker color channel for enhancement. In one example, after the contrast is further strengthened through nonlinear scaling, the boundary portion of the image is darkened to strengthen the edges and draw attention to the center of the image. Optionally, an attractive color balance adjustment is also made according to the gray levels to further enhance the appearance.

A display device capable of displaying a picture of vivid colors maintaining a good balance of colors and a good balance of light-emitting brightnesses of the EL elements. The widths of the detour wirings supplying current to the power source feed lines are increased for those EL elements into which a current of a large density flows. This constitution decreases the wiring resistances of the detour wirings, decreases the potential drop through the detour wirings, and suppresses the amount of electric power consumed by the detour wirings.

A non-transitory machine readable medium that a computer program for performing a color balance operation on color values of an image represented in a color space is described. The computer program receives a selection of a location on the image that includes several pixels. Each of the several pixels of the image includes a set of color values. Based on a set of color values of a set of pixels that corresponds to the selected location of the image, the computer program identifies a set of parameters for generating a color space transform that modifies the color space. The computer program then uses the color space transform to perform a color balance operation on the image.

Provided is a display device including: a light guide member for mixing light from a blue LED element coated with a translucent resin mixed with phosphor particles which converts blue light into green light with light from a red LED element to make white light exit from a light exit surface; and a non-self light emission display element provided on an irradiating surface side of the light guide member. Therefore, the display element is irradiated with white light whose sufficient wavelength region is 600 nm or more and whose intensity efficiency is high. When the display device further includes a circuit for separately controlling light emission intensities of the red LED element and a blue LED element, chromatic balance can be adjusted even after manufacturing and an intensity of the display device and color reproducibility thereof can be easily set in an optimum range even after assembly.

An electronic endoscope system includes an electronic endoscope and a processor to which the electronic endoscope is connectable. The processor includes a signal processor for displaying the images captured by the electronic endoscope, while adjusting the color balance thereof, and a memory holding an endoscope database. The processor further includes a CPU that retrieves endoscopic information from a memory of the electronic endoscope, which includes compensation data for white balance adjustment of the processor. The CPU registers the electronic endoscope with the endoscope database by storing the retrieved endoscopic information into the endoscope database when the white balance readjustment of the processor is required.

The camera has a body and an electronic imager disposed in the body. The electronic imager captures an ambient light image as a multicolored electronic image. Memory is operatively connected to the imager and stores the electronic image as a stored image. The camera has a color adjuster that includes a user interface ambient light detector and color balancer. The user interface ambient light detector has a light sensor and measures ambient illumination to provide an ambient light color value. The color balancer generates a copy of the stored image and modifies the color balance of that copy, responsive to the color value, to generate a compensated image. An image display mounted on the body adjacent the sensor, shows the compensated image. A switch mounted on the body, is switchable independent of the imager, to actuate and deactuate the color adjuster.

A photo-luminescent liquid crystal display (PL LCD) includes: a light control unit which includes a liquid crystal (LC) layer modulating the UV light and electrodes driving the LC layer; and a light emitting layer which emits light by the UV light transmitted through the light control unit. The light emitting layer includes inorganic phosphors and semiconductor quantum dots (QDs) having a quantum confinement effect. The PL LCD includes adding QDs having a high quantum efficiency into luminescent substances having lower light utilization efficiency than other colors, for example, red phosphor having very low quantum efficiency to improve the light utilization efficiency, thereby improving the color balance.

An automated process for color-balancing a series of oblique images captured from one or more positions and from one or more orientations. The automated process includes the step of selecting a series of color-balanced images to use as reference images. Then, on an oblique image by image basis (1) a portion(s) of a reference image(s) that overlaps the oblique image is located, (2) multiple color-balancing transformations are created that approximately matches the color distribution of the oblique image to the color distribution of the overlapping portion(s) of the reference image(s), (3) pixels in the oblique image are transformed according to the multiple color-balancing transformations created for that oblique image; and (4) the transformed pixel value is transformed in the oblique image or a copy of the oblique image.

A digital imaging device is provided with a touch sensitive display screen 10. The screen 10 displays an image 12 captured by the imaging device. Along one side of the screen is a toolbar 14 upon which is provided a plurality of individual icons 16. The icons 16 represent particular control functions that may be selected by a user. Examples of such control functions represented by the icons 16 include but are not limited to save, send, retrieve or discard image; rotate, reflect, crop, resize or edit image; compare images; process image (e.g. sharpen, blur, emboss, edge detect, pixelise, apply filter or similar); or vary image properties (e.g. brightness, colour balance, colour depth, contrast, convert to greyscale / black and white, effective surface temperature displayed (for infrared images) or similar). The user can select icons by touching the screen either directly or more preferably by tapping the screen with a suitable implement such as. a pen, a stylus or similar. Once a user has selected an icon, further icons may be displayed on the screen to allow the user to operate the selected function as desired.

A method is disclosed for processing of images to detect dental caries, that includes the following steps. Directing incident light (16) toward a tooth (20), where this light excites a fluorescent emission from the tooth. Obtaining a fluorescence image (35) from the fluorescent light component (19), and obtaining a reflectance image (34) from the back-scattered light (18) from the tooth. Applying a color balance operation to the reflectance image. Removing the specular reflectance components from the color balanced reflectance image (82) to give a back-scattered reflectance image (50). Registering the fluorescent image with the back-scattered reflectance image. Combining the registered fluorescent image (115) with the back-scattered reflectance image to provide a diagnostic image (52).

There is provided a light emitting device which enables a color display with good color balance. A triplet compound is used for a light emitting layer of an EL element that emits red color, and a singlet compound is used for a light emitting layer of an EL element that emits green color and a light emitting layer of an EL element that emits blue color. Thus, an operation voltage of the EL element emitting red color may be made the same as the EL element emitting green color and the EL element emitting blue color. Accordingly, the color display with good color balance can be realized.

A color marking device including a control system for calibration of the device based upon dynamic color balance control of an output image. The system comprises a front end converter for converting an input signal representative of a target image comprising a preselected color into a device-dependent control signal in accordance with a device TRC, a color marking device for outputting an output image in response to the control signal, a sensor for measuring a parameter from the output image representative of a color of the output image, and, a point-wise controller for comparing the parameter with a corresponding parameter from the target image and constructing adjusted controlled points for the device TRC when the measured parameter and the corresponding parameter vary by a preselected value, a color balance controller for constructing an adjusted device TRC from the controlled points, whereby subsequently generated output images are output with the adjusted device TRC and, more accurately represent target input images.

In an electronic endoscope system including a video scope having a solid-state image sensor that successively produces a frame of red, green, and blue image-pixel signals, a difference value is calculated between a value of each of corresponding central red, green, and blue image-pixel signals and an average of values of circumferential image-pixel signals surrounding the central image-pixel signal. When the respective values of the central red and green image-pixel signals are smaller than the corresponding averages of values, they are decreased in proportion to the absolute values of the corresponding difference values. When the value of the central blue image-pixel signal is smaller than the corresponding average of values, it is increased in proportion to the absolute value of the corresponding difference value.

A color balanced solid-state backlight provides feedback control of each color using a single photodetector by imposing a modulation pattern on the solid-state lamps revealing individual colors to the photodetector. The photodetector signal provides feedback controlling color balance over a small range of instantaneous brightness less than larger range of average brightness of the display to provide for accurate color balance throughout a large range of average brightnesses.

The method and system for printer color calibration use a combination of a full-width array (FWA) or similar page-scanning mechanism in conjunction with an spectrophotometer color measurement system in the output path of a color printer for measuring colors (e.g., on printed test sheets, banner / separation pages, etc.) with or without requiring any manual operations or operator involvement. The automatic color balance control system produces spatial tonal reproduction values for all four of the primary colors by printing patches, measuring colors using the sensor combination and automatically readjusting the spatial tone reproduction curves until a satisfactory level of printed color accuracy and uniformity are obtained. While producing color balanced TRCs, the system will automatically lock the printer output to some predetermined color patch targets. In one particular preferred embodiment, this output is locked to neutral gray when target colors are set to neutral gray inside the digital front end (DFE). After converging to the targets, the control system returns full TRCs for use inside the normal print path.