2086 results about "Color correction" patented technology

Displays are provided with circuitry performing color correction to compensate for the displays' luminance and chrominance transfer characteristics. Some techniques are suitable for RGBW displays and for subpixel-rendered displays. Some displays include an external light source (e.g. a backlight unit in LCDs), and the color correction is coordinated with dynamic control of the light source.

Exemplary embodiments of the invention provide a multi-screen video playback system which enables synchronized video playback, and at the same time enables irregular playback such as color processing, contents change. According to exemplary embodiments, a multi-screen video playback system includes a plurality of rendering units RU1 through RU4 which are connected to LAN as a network and output video data to a plurality of display devices D1 through D4; a function which is connected to LAN and distributes timing information to the rendering units RU1 through RU4 by simultaneous transmission; a timing server TS which generates the irregular playback control information to enable irregular playback, such as color correction and contents change to the video data, in a plurality of rendering units RU1 through RU4 which output video data to each corresponding display device of the plurality of display devices D1 through D4; and video data storage devices S1 through S4 to store video data to be reproduced.

The evolution of a skin condition over time can be useful in its assessment. In an illustrative arrangement, a user captures skin images at different times, using a smartphone. The images are co-registered, color-corrected, and presented to the user (or a clinician) for review, e.g., in a temporal sequence, or as one image presented as a ghosted overlay atop another. Image registration can employ nevi, hair follicles, wrinkles, pores, and pigmented regions as keypoints. With some imaging spectra, keypoints from below the outermost layer of skin can be used. Hair may be removed for image registration, and restored for image review. Transformations in addition to rotation and affine transforms can be employed. Diagnostic correlations with reference image sequences can be made, employing machine learning in some instances. A great variety of other features and arrangements are also detailed.

A system and method for analysis of colorimetric test strip strips and disease management. The system can include an accessory that is operably coupled to a mobile device, the mobile device acquiring and / or analyzing images of the colorimetric test strips. The light box accessory can be detachably attached to the mobile device, or made to remain attached to the mobile device, but with the capability of having the light box accessory removed from the field of view of the camera for general photography purposes. In other embodiments, an image containing known calibration color(s) and reagent area(s) is obtained sans the light box for comparison with a previous calibration image to model changes in ambient lighting conditions and determine a color correction function. The correction can be applied to the detected reagent area color(s) for matching between the detected reagent area color(s) and reference color(s) on the reference chart. Optionally, the information can be processed and displayed to provide feedback, as well as transmitted to a health provider for analysis.

Color or grayscale images having optical elements induced geometric distortions can be corrected on individual color image component by creating correction image component having the complementary distortion; and applying the correction image component to the corresponding distorted color image component.

One embodiment of the invention comprises a simplified light-weight head mounted displays comprising an off-axis combiner and a pair of plastic lenses. One of the lenses is a rotationally symmetric optical element and one of the lens is a non-rotationally symmetric optical element. This non-rotationally symmetric optical element comprises first and second lens surfaces that are tilted and decentered with respect to each other. One of these first and second lens surfaces may also include diffractive feature to provide a diffractive or holographic optical element for color correction.

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.

Displays are provided with circuitry performing color correction to compensate for the displays' luminance and chrominance transfer characteristics. Some techniques are suitable for RGBW displays and for subpixel-rendered displays. Some displays include an external light source (e.g. a backlight unit in LCDs), and the color correction is coordinated with dynamic control of the light source.

A digital camera (10) includes a face detecting section (74), a color temperature detecting section (76) and a flash device (86) having an LED array in which RGB LEDs are regularly arranged as a light source. When a shutter button (18) is pressed halfway, the face detecting section (74) reads out image data of a through image from a memory (60) and detects a person's face in the image. A CPU (64) identifies a scene based on brightness values of face and surrounding areas as, for example, a backlit scene, and specifies a face peripheral area according to an exposure pattern corresponding to the backlit scene. When the shutter button (18) is fully pressed, the CPU (64) sends a flash projection command to an LED control circuit (87), thereby illuminating the LEDs corresponding to the face peripheral area. By controlling illumination of the RGB LEDs, the LED control circuit (87) directs to project the flash light having color temperature that corrects the person's face color into an appropriate skin color.

It is an object to perform color correction that is simple and utilizes existing devices to achieve an increase in the feeling of depth in 2D images. Input image data are transformed into predetermined color information by a color information calculation portion 11. A correction amount control portion 10 determines a correction gain value for the color information according to depth information that has been input. A color information correction portion 12 performs color information correction based on the correction amount due to the contrast between the color information of a target pixel and representative color information of the surrounding region, and the correction gain value of the correction amount control portion. An output portion 13 converts this into a predetermined image format and outputs the result. Thus, by correcting the color information based on the contrast effect in conjunction with the depth information of the foreground and the background, for example, it is possible to easily increase the feeling of depth in a 2D image. Moreover, by controlling the color contrast effect with the depth information when performing the color correction, it becomes possible to more easily give a sense of depth that is perceived by humans.

A capsule endoscope is provided with lighting means for illuminating the interior of a living body, an image pickup means for capturing an image of a site illuminated by the lighting means, and a transparent cover which houses the image pickup means and the lighting means within a sealed, cylindrical-shaped capsule case. The image pickup means includes an objective optical system having a depth of field. An object within the depth of field of the objective optical system is illuminated more evenly than possible with a single lighting means by arranging multiple lighting means at the periphery of the objective optical system and causing the beams from individual lighting means to overlap in specified ways so that a nearly uniform illumination of an object of interest is achieved. Light diffusers may be employed to diffuse the light from the light sources, and a color correction filter may be used.

A method for correcting color shift in an imaging system, including an imaging object, and a standard color conversion lookup table associated with the imaging object, includes measuring a plurality of test patches to obtain color data associated with the imaging object. A signature color data lookup table is generated, based on the color data, and is combined with the standard color conversion lookup table to generate a composite color conversion lookup table for use with the imaging object.

A raw image consists of a plurality of pixels in a plurality of colour planes giving a colour image. The raw image is split into at least a low frequency image and a high frequency image. At least the low frequency image is colour corrected to produce a colour corrected low frequency image. The colour corrected low frequency image is combined with at least the high frequency image to give a final image which is of comparable resolution to the raw image but is colour corrected.

An image processing apparatus of correcting the color of a specific range of a pixel signal for each pixel included in an input image signal, comprises an intensity determination means of generating a correction intensity that is small on the periphery of the color region of the specific range on the basis of two chromaticity signals excluding a luminance component and large in the vicinity of the nearly central portion of the range in the pixel signal, a target color setting means of setting a target color depending on which the pixel signal is corrected, a correction degree setting means of setting correction degree by also using information, other than pixel information, included in the pixel signal, and a correction means of making the image signal close to the target color depending on the correction intensity output from the intensity determination means and the correction degree output from the correction degree setting means.

The invention provides a vehicle license plate recognition method based on a video. According to the vehicle license plate recognition method based on the video, moving vehicles are detected and separated out with the vehicle video which is obtained through actual photographing by means of a camera serving as input, the accurate position of a vehicle license plate area is determined by conducting vertical edge extraction on a target vehicle image obtained after pre-processing, a vehicle license plate image is separated out, color correction, binaryzation and inclination correction are conducted on a vehicle license plate image, each character in the positioned vehicle license plate area is separated to serve as an independent character, feature extraction is conducted one each character, obtained feature vectors are classified through a classifier which is well trained in advance, a classification result serves as a preliminary recognition result, secondary recognition is conducted on the stained vehicle license plate characters according to a template matching algorithm imitating the visual characteristics of human eyes, and then a final vehicle license plate recognition result is obtained. The vehicle license plate recognition method based on the video has the advantages that hardware cost is reduced, the management efficiency of an intelligent transportation system is improved, the anti-jamming performance and the robustness are high, the recognition efficiency is high, and the recognition speed is high.

In a display device having a color filter, a color material dispersed layer having the function of absorbing light of specific wavelengths in the visible light beam region is provided on the optical path so that the light absorption peak of this color material dispersed layer in the visible light beam region is located in the range of ±30 nm from the overlap point in the spectral transmission properties of each color of the color filter. Further, the color material dispersed layer is provided on a filter as a constituent part of the back light of the display. This filter has, as its substrate, a thermoplastic resin having a thickness of 30-350 micrometers and has a transmission in the maximum absorption wavelength in the color material dispersed layer of not more than 75%. The back light has, as its light source, a fluorescent lamp comprising a three band tube, and its emission color is subjected to color correction by an auxiliary filter having an organic color material dispersed layer provided on the illuminating light path.

A method for the automatic detection and correction of red eye in a digital image is disclosed. The method includes defining a digital image in a hue-saturation-intensity (HSI) color space, and identifying a red eye region in a digital image. Using HSI criteria, identified regions are filtered to discard areas unlikely to be the result of red eye effect, and then a plurality of algorithms are used to apply a color correction to each pixel in the identified red eye region. The color correction manipulates each pixel of the red eye region remove the red eye effect. The method is automatic, and requires no input from a user to define the red eye region, to identify the true color of the red eye region, or to apply the color correction.

A color transforming device using brightness information of an image and a display device having the same are disclosed. The color transforming device includes a color transformation memory for storing coefficient information in order to process a color transformation of an input image based on brightness of the input image; and a color transformation processing unit for correcting a color of the input image by using the coefficient information stored in the color transformation memory and outputting the color corrected input image. The present invention provides a color transforming method suitable to a display device automatically controlling output brightness according to brightness of input image by performing a color transformation according to the brightness of input image. When the present invention is implemented to the PDP, color information of input image signal is accurately reproduced by performing the color transformation according to the APC level of input image.

Color information of a color image is represented by the Lab color space. A user can change hue by moving the position of a reference circle displayed on the a*b* plane in the Lab color space and change saturation by changing the size of the reference circle. The color information of the color image is changed with changes in the reference circle, allowing the user to conjecture changes in the color image visually and make color corrections easily and quickly.

A color display system providing reduced observer metameric failure for a set of target observers, comprising an image forming system having narrow-band primaries. A data processing system is used to implement a method for color correcting an input color image having input color values adapted for display on a reference display device having a plurality of input color primaries. A metamerism correction transform is applied to the input color image to determine an output color image having output color values in an output color space appropriate for display on the image forming system. The metamerism correction transform modifies colorimetry associated with the input colors to provide output color values such that an average observer metameric failure is reduced for a distribution of target observers.

An image not subjected to color correction, gamma correction, MTF correction and others is used as an image to be subjected to Retinex image processing. Thus, a RAW image prepared only by converting an electric signal of a CCD image sensor by an A / D converter into a digital form is used as an image to be subjected to the Retinex processing. Predetermined gamma correction is performed after the Retinex processing. Thereby, Retinex algorithm substantially modeling functions of a retina and a cortex of a living body exhibits its original performance. The resolution of the original image is lowered, and processing is performed on an image thus produced to produce a blurred image. Then, the resolution of the blurred image is restored to the same resolution as that of the original image, and the Retinex processing is performed. Thereby, the Retinex processing can be performed without increasing memory consumption and extremely lowering an operation speed.

A semiconductor image sensor is provided that includes an on-chip temperature-sensitive element. The signal output of the temperature-sensitive element is used to determine a black level value for the image sensor and to calculate a color correction value to be applied to the signal output of the semiconductor image sensor. The signal output of the temperature-sensitive element may be determined by time-averaging a series of signal outputs from the temperature-sensitive element. The temperature-sensitive element signal output may also be determined by combining, e.g., averaging, the signal outputs of a plurality of on-chip temperature-sensitive elements.

The invention discloses a projector and a projection image rectifying method thereof. The projection image rectifying method includes: taking images of a projection area projected on a display screen by the projector through a taking module and obtaining images; determining corresponding geometric rectifying parameters by a rectifying module according to the projection area in the pictures; computing and converting original images to be projected by utilizing geometric rectifying parameters to obtain rectified images; and projecting the rectified images onto the display screen by the projection module. By analyzing the projection area in the images to perform geometric rectifying process or color rectifying process, so that rectifying operation can be realized without preset images with certain features, and process of rectifying projection images is simplified.

The present invention executes color correction that improves the feeling of depth of a 2D image with ease and by using a preexisting device.Input image data is first converted into brightness information by a brightness information calculation portion. The interest level within the image is then estimated by an interest level estimation portion based on that information. The vanishing point is then estimated by a vanishing point estimation portion. Next, a depth estimation portion estimates the degree of depth based on the distance from the vanishing point to a pixel i and the interest level of the pixel i, and calculates a depth correction gain value. A corrected image, obtained by controlling a depth correction image process based on the depth correction gain value, is converted to a predetermined image format and outputted by an output portion. Accordingly, by linking an interest level based on the brightness contrast / color contrast / blurriness amount with the depth estimation based on the vanishing point, the occurrence of abnormalities felt with images that do not properly match up with the perspective structure of the vanishing point, images that do not match the visual impression of humans, and so on can be reduced, making it possible to achieve a more natural and improved feeling of depth.

The present invention relates to a method for correcting at least one color of a photographic image including at least one pattern area or image pattern with a predictably known color or memory color, said image being transferred to a digital representation, wherein the method comprises the following steps: said at least one pattern area or image pattern is being detected with respect to its presence and its location, and preferably also with respect to its dimensions; an existing color in the at least one detected pattern area or image pattern is being determined; at least one replacement color value (memory color) is being provided, said value being related to the respective at least one pattern area or image pattern and the determined existing color is replaced by said at least one replacement color value, to correct the color in the image pattern or image area.

Some embodiments provide a method of color correcting an image. Some such embodiments provide (1) a display area for displaying a modifiable graph correlating a first color attribute of the image to a set of second color attributes and (2) at least one tool that adjusts the graph in order to adjust color attributes in the image. The graph adjustment tool of some embodiments is a set of control points that specify the color correction adjustment over a parameterized curve representation of the graph. In some embodiments, the graphs are rasterized curves that are adjusted through the use of a Gaussian manipulator. The Gaussian manipulator distributes a second color attribute adjustment over a set of first color attribute values according to a Gaussian distribution. Moreover, some embodiments allow for the selective switching between the parameterized and rasterized curves or the control points and the Gaussian manipulator.