摘要:
A group point spread function (238) for a blurry image (18) can be determined by dividing the blurry image (18) into a plurality of image regions (232), estimating a region point spread function (234) for at least two of the image regions (232); and utilizing at least two of the region point spread functions (234) to determine the group point spread function (238). The group point spread function (238) can be determined by the decomposition of the estimated region point spread functions (234) into some basis function, and subsequently determining a representative coefficient from the basis functions of the region point spread functions (234) to generate the group point spread function (238).
摘要:
A system for providing an adjusted image of a scene includes an optical assembly, a capturing system coupled to the optical assembly, and a control system. The optical assembly is adjustable to alternatively be focused on a first focal area and a second focal area that is different than the first focal area. The capturing system captures a first frame of the scene when the optical assembly is focused at the first focal area, and a second frame of the scene when the optical assembly is focused at the second focal area. The first frame includes a plurality of first pixels and the second frame includes a plurality of second pixels. The control system analyzes the first frame and the second frame and utilizes graph cuts techniques to assign a depth label to at least a portion of the first frame.
摘要:
A method for estimating whether an image (14) is either blurred or sharp includes the steps of (i) determining an image gradient histogram distrbution (410) of at least a portion of the image (14), (ii) comparing at least a portion of the image gradient histogram distribution (410) to a Gaussian model (414), and (iii) estimating a defocus blur size of at least a portion of the image (14) Additional methods for evaluating whether the image (14) has motion blur are provided herein For example, a dominant gradient orientation can be detected by histogram analysis (716), and the dominant gradient orientation (718) can be used to determine a possible motion blur direction (720) Alternatively, a dominant gradient orientation can be detected using principal component analysis (“PCA”) on the image.
摘要:
In a first aspect, a method and an apparatus for processing an image classifies the image content of a portion of the image, and in response thereto, selects between linear interpolation (e.g., cubic) and non-linear interpolation (median) methods to interpolate data points for the portion of the image. In one embodiment, non-linear interpolation is selected if the image content of the portion of the image is bi-level, or if portion of the image includes an edge and lacks a specified measure of correlation along a line. Linear interpolation is used in portions where the image content does not include an identified edge and in portions where there is an identified edge in combination with an identified edge direction or a path of isobrightness. In a second aspect, a method and apparatus for use in classifying the image content of a portion of an image calculates a reference value from pixel values for a portion of an image and generates data indicative of which pixel values are greater than the reference value and which pixel values are less than the reference value.
摘要:
A component of an image processor receives at least a portion of one or more reconstructed versions of an image including a causal context of an object pixel of the image, and provides a prediction for the object pixel computed as a weighted sum according to at least one measure of correlation and a weighting policy. A component receives a first prediction of an object pixel and reconstructed versions of an image, and provides a second prediction for the object pixel in accordance with the first prediction for the object pixel and a substantially mean error for the context. A component receives one or more prediction differences versions of the image including a causal context prediction difference of an object prediction difference of the image, and provides a prediction for the object prediction difference computed as a weighted sum according to at least one measure of correlation and a weighting policy.
摘要:
A system (300) for detecting whether an image (16) is blurred performs the steps of: identifying valid light trails in the test image (308), and classifying the test image as blurred if there is a sufficient number of matching valid light trails oriented in a repetitive pattern (310). The system (300) is designed to automatically detect whether a night scene image (16) is blurred based on the existence and characteristics of any light trails (552) in the captured image (16). Because the method extracts the characteristics of the light trails (552) and analyzes these light trails (552), it accurately detects blur in the challenging night scene images and has a relatively low false positive rate.
摘要:
An image apparatus (10) for providing an estimated final illuminant of a scene (12) and subsequently providing an adjusted image (218) of a scene (12) includes a capturing system (226) and a control system (232). The capturing system (226) captures information for an input image (416) of the scene (12) while at an apparatus setting. The input image (416) is defined by a plurality of input colors. The control system (226) can compare at least one of the input colors to an illuminant database (245) that includes an illuminant gamut of observable colors for a plurality of possible illuminants, and can evaluate the apparatus setting to select one of the possible illuminants to be the estimated final illuminant. Examples of possible apparatus settings include an aperture size and an exposure time. With this design, the present invention is better able to distinguish between some possible outdoor illuminants and some possible indoor illuminants with improved accuracy. Additionally, the control system (226) can evaluate a consistency matching error for the plurality of possible illuminants to determine if the scene (12) has intrinsic color casting.
摘要:
A system (12) for providing an adjusted image (228) of a scene (10) from a blurred captured image (14) includes a control system (26) that provides the adjusted image (228). The control system (26) can create a downsampled blurred image (236) from the captured image (14), deblur the downsampled blurred image (236) to create a downsampled deblurred image (238), and upsample the downsampled deblurred image (238) to create the adjusted image (228). With this design, because the deblurring is performed on the downsampled blurred image (236), the computational and memory costs are substantially less than if this task is performed on the original captured image (14). Further, the control system (26) can create the adjusted image (228) using a joint bilateral filter that combines information from the blurred captured image (14) and the downsampled deblurred image (238).
摘要:
An image apparatus (10) for providing an estimated final illuminant of a scene (12) and subsequently providing an adjusted image (218) of a scene (12) includes a capturing system (226) and a control system (232). The capturing system (226) captures information for an input image (416) of the scene (12) while at an apparatus setting. The input image (416) is defined by a plurality of input colors. The control system (226) can compare at least one of the input colors to an illuminant database (245) that includes an illuminant gamut of observable colors for a plurality of possible illuminants, and can evaluate the apparatus setting to select one of the possible illuminants to be the estimated final illuminant. Examples of possible apparatus settings include an aperture size and an exposure time. With this design, the present invention is better able to distinguish between some possible outdoor illuminants and some possible indoor illuminants with improved accuracy. Additionally, the control system (226) can evaluate a consistency matching error for the plurality of possible illuminants to determine if the scene (12) has intrinsic color casting.
摘要:
A process for increasing the rate of biocatalysis reactions, which comprises applying a direct current electric field to a reaction mixture, wherein the reaction mixture and the electrodes used to apply said electric field are separated such that the reaction mixture does not come into contact with said electrodes.