摘要:
A broadband line source that is directional, rugged, compact, spatially and temporally uniform, stable, without the need for warmup, and relatively easy to implement. The source can be in single-color or multi-color, and it can be used, for example, in a scanner. In one embodiment, the line source includes a first thin-film electroluminescent stack with at least a bottom electrode, a top electrode, and a first active film between the two electrodes. The active film generates radiation in an area that has a width and a length, with the length being larger than the width. The length of the area sets the length of the line radiation, which is substantially homogenous along the line. In another embodiment, three of such stacks are encapsulated through thin-film processes by a cap, which sits on a substrate. The cap has one side surface that is more transmissive to radiation. The generated radiation is directed by the cap to be emitted at the more transmissive side surface to produce a single-color or a multi-color line source.
摘要:
Determining, applying and storing model spectral response parameters used to correct colors in a digital image. The model spectral response parameters may be estimated through a recursive error analysis and applied or stored to all digital imaging devices of a particular type, thereby occupying minimal firmware storage space and permitting on the fly correction of images.
摘要:
A system and method for color correcting electronically captured input images utilizes a correlation between the input images and a set of reference images of different media types to determine the media type of the input images. In an exemplary embodiment, the correlation is performed using a media correlation matrix, which includes media characteristic data from the different media types. The media type information of the input images is used to customize the color correction procedure being performed on the input images. The customization of the color correction procedure ensures that the final images are accurate reproduction of the input images with respect calorimetric or perceptual match.
摘要:
An array of vertical color filter (VCF) sensor groups, optionally including or coupled to circuitry for converting photogenerated carriers produced in the sensors to electrical signals, and methods for reading out any embodiment of the array. The array has a top layer (including the top sensors of the sensor group) and at least one low layer including other ones of the sensors. Only the top layer can be read out with full resolution. Each low layer can only be read out with less than full resolution to generate fewer sensor output values than the total number of pixel sensor locations. Typically, the sensor groups are arranged in cells, each cell including a S sensor groups (e.g., S=4), with S sensors in the top layer and fewer than S sensors in each low layer of the cell. Typically, each cell includes at least one shared sensor (a sensor shared by two or more VCF sensor groups) in each low layer, and each cell includes sensor selection switches (e.g., transistors) between the cell's sensors and a sense node.
摘要:
A vertical color filter sensor group formed on a substrate (preferably a semiconductor substrate) and including at least two vertically stacked, photosensitive sensors, and an array of such sensor groups. In some embodiments, a carrier-collection element of at least one sensor of the group has substantially larger area, projected in a plane perpendicular to a normal axis defined by a top surface of a top sensor of the group, than does each minimum-sized carrier-collection element of the group. In some embodiments, the array includes at least two sensor groups that share at least one carrier-collection element. Optionally, the sensor group includes at least one filter positioned relative to the sensors such that radiation that has propagated through or reflected from the filter will propagate into at least one sensor of the group.
摘要:
An optical projection system that produces an image by use of a lenticular array and one or more lightvalves together with different lens filters in a variety of configurations and lenticule shapes.
摘要:
Systems and methods for testing and calibrating camera modules based on a benchmark standard are provided. The systems can include a receptacle for receiving a camera module under test and a spectrometer. The test station can capture a test measurement using the camera module under test while contemporaneously capturing a true measurement using the spectrometer. Using the true measurement, the test station can predict how the benchmark standard would have performed in those conditions and compare that expected performance to the test measurement. Any differences can be stored in memory within the camera module under test for later retrieval to optimize image processing.
摘要:
A digital image capture and processing system, comprising a lens coupled to a lens control element is disclosed. The image capture system includes an image sensor configured to capture images from the lens, and a memory element and a processor coupled to the lens control element. The memory element includes image capture software, where the image capture software causes the lens and the image sensor to capture at least two images, each of the at least two images captured using a varying parameter and stored as a single file where the at least two images are combined to form a new image having at least one characteristic different from corresponding characteristics of the at least two images.
摘要:
Color digital imaging quality is improved by quickly, accurately and robustly estimating illuminant information associated with a color digital image to correct color of the image based on the illuminant. A "correlation matrix memory" or "associative matrix memory" is used to achieve identical results to the Color in Perspective method, and to improve it by adding Bayesian or other correlation statistics. The new method is insensitive to aperture colors and provides an effective framework on top of estimation. It will effortlessly return the maximum likelihood answer. A correlation matrix memory is built to correlate the data from any picture image to reference images under a range of illuminants. When a camera, scanner, or the like, produces a picture image, the data is converted to chromaticity and a vector is created corresponding to the values existing in the scene. This vector is multiplied by each column in the correlation matrix giving a new matrix. Each column is then summed, and the resulting values form a vector that represents the likelihood of each reference source being the illuminant of the scene. The vector values can be density plotted where each value is plotted at the chromaticity of the illumination for that particular column. From this plot normal statistical methods can be used to estimate the likely illumination of the scene. Greatly reduced computational requirements result because simple binary matrix algorithms replace complex geometrical calculations
摘要:
A digital camera includes a lens and a plurality of color filters adjacent the lens. An array of detectors such as CCDs each receive, through the lens and a corresponding one of the color filters, light reflected from a scene. Each detector outputs a signal representative of an amount of light it receives. Circuitry is connected to the array for processing the signals from the detectors and generating a set of digital image data including a chromaticity value and a luminance value of a plurality of pixels representing an uncorrected image of the scene. A control circuit maps a two-dimensional representation of the digital image data into a two-dimensional representation of a set of reference image data and adjusts selected ones of the values of the set of digital image data in accordance with a predetermined transform to white balance the uncorrected image of the scene and produce a modified set of digital image data representing a corrected image of the scene.