摘要:
A display system, method, and computer program product are provided for capturing images using multiple integrated image sensors. The display system includes a front panel for displaying an image. The display system further includes a matrix of image sensors situated behind the front panel.
摘要:
A system-on-chip imaging system includes an image sensor of a two-dimensional array of pixel elements providing pixel data representing an image of a scene, a data memory for storing pixel codewords whereby at least some of the pixel codewords are indicative of the pixel data, a programmable lookup table for providing LUT codewords as output data, and a processing unit for receiving LUT codewords from the lookup table and generating output image data. In operation, a first pixel codeword stored in the data memory is used to index the lookup table for causing the lookup table to provide a respective LUT codeword to the processing unit. The processing unit operates to perform one or more image processing functions in response to the LUT codeword. The lookup table can be programmed to perform a variety of image processing functions, including defective pixel correction, CDS subtraction, privacy masking and dark signal subtraction.
摘要:
A fixed pattern noise subtraction method in a digital imaging system incorporating a digital image sensor includes: acquiring a reference image of the digital image sensor when the digital image sensor receives no illumination, storing a reference value of an operating parameter associated with the reference image where the reference image is indicative of the fixed pattern noise associated with the digital image sensor, storing a model describing the behavior of the fixed pattern noise as a function of the operating parameter. Then, the method continues with acquiring a first image, measuring a current value of the operating parameter associated with the first image, calculating a noise prediction image by extrapolation of the reference image in accordance with the model and based on the current value and the reference value of the operating parameter, and subtracting the noise prediction image from the first image to generate a final image.
摘要:
An integrated image sensor having a conditioned top silicon oxide layer and/or one or more additional insulating layers/structures to reduce optical and/or electrical noise. The image sensor has an array of one or more pixels, each pixel having a photoelement formed on a substrate and configured to generate an electrical signal in response to incident light, and associated circuitry formed on the substrate and configured to process the electrical signal generated in the photoelement. In one embodiment, a portion of a top insulating layer in the integrated image sensor corresponding to each photoelement has a thickness different from the thickness of a portion of the top insulating layer corresponding to its associated circuitry to inhibit the flow of light between the associated circuitry and the photoelement and/or between the pixel and an adjacent pixel in the array. In another embodiment, the image sensor has one or more insulating structures formed on the substrate and configured to inhibit the flow of electricity between a photoelement and its associated circuitry and/or the pixel and an adjacent pixel in the array. The present invention can reduce optical and/or electrical noise and crosstalk to improve image quality and diminish artifacts in the image sensor's output.
摘要:
An image sensing system includes an IR notch filter configured to block transmission of spectral energy having wavelengths in an interface region between the visible and the invisible spectra and enable transmission of spectral energy having wavelengths in at least the visible spectrum and the near-infrared (IR) spectrum, a digital image sensor including a two-dimensional array of pixel elements and configured to generate output signals at each pixel element as pixel data representing an image of a scene, and a color filter array including a two-dimensional array of selectively transmissive filters superimposed on and in registration with the two-dimensional array of pixel elements. The color filter array includes a first group of selectively transmissive filters disposed to transmit spectral energy in one or more colors of the visible spectrum and a second group of gray color filters disposed to transmit spectral energy in at least the near-infrared (IR) spectrum.
摘要:
Methods of detecting relative misalignment between a color filter array and a sensor array in a color sensor array. The present invention provides methods for detecting and compensating for shifts of one or more rows and/or columns between a color filter array and a sensor array that may occur during the color sensor array fabrication process. The present invention also enables the use of color sensor arrays in which the alignment of a color filter array relative to the corresponding sensor array is unknown. In one embodiment, a detectable pattern of one or more pixels (e.g., pixels having black filters) is introduced into the periphery of the color sensor array. The position of the pattern is detected and color image data are processed with respect to the detected position. The invention is very cost effective and enables the use of image sensors with misaligned color filter arrays just as if they were manufactured correctly. The benefits of the present invention include (1) increased manufacturing yields and, therefore, lower per unit manufacturing cost and (2) higher reliability of image sensors configured with color filter arrays.
摘要:
Currently, electronic imaging cameras use expensive array photodetectors instead of inexpensive linear photodetectors because they cannot scan linear detectors across the entire image within their exposure time and because the linear photodetectors do not capture sufficient photons to produce a high quality image. An image capture system is described that has a lens to form an image on an imaging plane, a linear detector mounted to preclude translational motion, a mirror for deflecting the image to the plane of the linear detector, and a mechanism that moves the mirror to scan the image across the linear detector.
摘要:
A color printing system includes a discrete CMY color printer, a LAB color error diffuser, and a LAB/CMY converter. The diffuser includes an image compensator, a vector color space reverter, an error calculator, and an error diffuser. The vector color space reverter provides for error diffusion in a LAB color space that is different from the CMY color space of the printer. The perceptual linearity of the LAB color space provides for enhanced color fidelity in the printed image. In addition, color conversion and error diffusion are performed together, minimizing computational error accumulation and maximizing computational throughput.
摘要:
An image sensing system includes an IR notch filter configured to block transmission of spectral energy having wavelengths in an interface region between the visible and the invisible spectra and enable transmission of spectral energy having wavelengths in at least the visible spectrum and the near-infrared (IR) spectrum, a digital image sensor including a two-dimensional array of pixel elements and configured to generate output signals at each pixel element as pixel data representing an image of a scene, and a color filter array including a two-dimensional array of selectively transmissive filters superimposed on and in registration with the two-dimensional array of pixel elements. The color filter array includes a first group of selectively transmissive filters disposed to transmit spectral energy in one or more colors of the visible spectrum and a second group of gray color filters disposed to transmit spectral energy in at least the near-infrared (IR) spectrum.
摘要:
A method for generating coefficients for a set of convolution kernels for use in interpolating pixel values in an image sensor is described. The coefficients are computed by applying a constraint matrix specifying one or more constraints. The method includes generating ideal sensor data representative of a test image in a first color plane, generating sensor data of the test image, generating f data matrices including pixel data from multiple neighborhoods of pixels in the pixel array, and determining the coefficients for f convolution kernels using the ideal sensor data, the f data matrices and by applying one or more constraints. The use of a constraint matrix greatly simplifies the computation of the coefficients and can be applied in image processing to generate a high quality full color image.