Patent application number | Description | Published |
20080204577 | IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM PRODUCT - An image processing system including: a CCD which outputs an image signal; an edge extraction unit which extracts an edge signal from the image signal; a false edge estimation unit which estimates an edge signal that arises due to noise components based upon the image signal; an edge correction unit which corrects the edge signal by performing coring processing based upon the edge signal that arises due to noise components; and an edge enhancement unit which performs enhancement processing on the image signal based upon the edge signal thus corrected. | 08-28-2008 |
20080218635 | IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, AND COMPUTER PROGRAM PRODUCT - An image processing system includes a multiresolution decomposition section for frequency decomposing an image signal into high and low frequency components at an nth stage, a correction coefficient calculation section for calculating at least one of a gradation correction coefficient, a noise correction coefficient, and an edge correction coefficient with respect to the high frequency component at an ith decomposition stage (1≦i≦n) based on at least one of the low frequency component at the ith decomposition stage, a visual system adaptation model, a noise amount estimation model, and an edge enhancement model, a correction section for correcting the high frequency component based on the calculated correction coefficient, and a multiresolution composition section for composing the image signal corrected based on the low frequency component and the corrected high frequency component. | 09-11-2008 |
20080231730 | CAMERA SYSTEM - A camera system is provided, which performs exposure amount control operation in combination with gradation conversion processing for an image signal acquired from a CCD. With such a camera system, a control unit performs control operation so as to perform pre-shooting multiple times with different exposure amounts prior to real shooting. A conversion property calculation unit calculates conversion properties with respect to the image signals acquired in the pre-shooting, which are to be used in the gradation conversion processing. An exposure control unit determines an exposure amount used in the real shooting based upon the image signals acquired in the pre-shooting, the exposure amounts used in the pre-shooting, and the conversion properties. The control unit performs control operation so as to perform the real shooting based upon the determined exposure amount. A gradation conversion unit performs gradation conversion processing on the image signals obtained in the real shooting. | 09-25-2008 |
20080240556 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING PROGRAM, AND IMAGE PROCESSING METHOD - An image processing apparatus converts a color image signal into a luminance signal and a color signal in a predetermined color space ( | 10-02-2008 |
20080266432 | IMAGE PICKUP SYSTEM, IMAGE PROCESSING METHOD, AND COMPUTER PROGRAM PRODUCT - An image pickup system for processing a signal from a CCD includes a noise reducing unit for performing a noise reduction processing on the signal from the CCD, an edge direction detection unit for detecting an edge direction from the signal having been subjected to the noise reduction processing, and an edge extraction unit for extracting an edge component from the signal from the CCD on the basis of the edge direction. | 10-30-2008 |
20090073288 | IMAGING SYSTEM AND REPRODUCING SYSTEM - An image pickup system according to the present invention includes an extracting unit for extracting a block area with a predetermined size from a signal of an image pickup device, a transforming unit for transforming the signal in the extracted block area into a signal in a frequency space, an estimating unit for estimating the amount of noises of a frequency component except for a zero-order component based on the zero-order component in the transformed signal in the frequency space, a noise reducing unit for reducing noises of the frequency component except for the zero-order component based on the estimated amount of noises, and a compressing unit for compressing the zero-order component and the frequency component except for the zero-order component from which the noises are reduced. | 03-19-2009 |
20090086062 | IMAGING SYSTEM AND REPRODUCING SYSTEM - An image pickup system according to the present invention includes an extracting unit for extracting a block area with a predetermined size from a signal of an image pickup device, a transforming unit for transforming the signal in the extracted block area into a signal in a frequency space, an estimating unit for estimating the amount of noises of a frequency component except for a zero-order component based on the zero-order component in the transformed signal in the frequency space, a noise reducing unit for reducing noises of the frequency component except for the zero-order component based on the estimated amount of noises, and a compressing unit for compressing the zero-order component and the frequency component except for the zero-order component from which the noises are reduced. | 04-02-2009 |
20090096889 | IMAGE PICKUP SYSTEM AND IMAGE PICKUP PROGRAM - An image pickup system configured to perform an estimation for an unknown spectral characteristic related to a subject or an illumination light on the basis of an image signal from a color image sensor system, includes: a control unit for performing a control to change a predetermined spectral characteristic in the color image sensor system in a time series manner and cause a plurality of image pickup operations; a verification unit for verifying a reliability related to the plurality of image signals; a correction unit for performing a correction processing on the plurality of image signals on the basis of the reliability; and an estimation unit for performing the estimation for an unknown spectral characteristic related to the subject or the illumination light on the basis of the plurality of image signals on which the correction processing is performed. | 04-16-2009 |
20090141150 | IMAGE PICKUP SYSTEM - In the image pickup system of the present invention, factors that have an effect on noise such as the signal level, temperature of the CCD during shooting, exposure time, gain and the like are dynamically acquired, the noise level of the CCD is estimated, for example, for each pixel by a noise estimating unit, and signal components equal to or less than this noise level in the video signals are suppressed by a noise reducing unit, so that a high-quality image that is substantially free of noise is obtained while preserving the edges of the image and the like. | 06-04-2009 |
20090219416 | IMAGE PROCESSING SYSTEM AND RECORDING MEDIUM RECORDING IMAGE PROCESSING PROGRAM - An image processing system includes a frequency decomposition unit adapted to decompose an image signal into a high frequency component and a low frequency component, a high frequency separation unit adapted to separate the high frequency component into an invalid component caused by noise and other valid component, a conversion characteristic calculation unit adapted to calculate a conversion characteristic on the basis of the low frequency component, a gradation processing unit adapted to perform a gradation processing on the low frequency component and the valid component on the basis of the calculated conversion characteristic, and a frequency synthesis unit adapted to generate an image signal on which a gradation conversion has been performed by synthesizing the low frequency component on which the gradation conversion has been performed, the valid component on which a gradation conversion has been performed and the invalid component. | 09-03-2009 |
20090219417 | IMAGE CAPTURING SYSTEM AND COMPUTER READABLE RECORDING MEDIUM FOR RECORDING IMAGE PROCESSING PROGRAM - An image capturing system includes: a first noise reduction unit which roughly removes the effects of an edge component by performing edge-preserving adaptive noise reduction processing on a target pixel within a local region including the target pixel and the neighboring pixels extracted from an image signal acquired from a CCD; a noise estimation unit which dynamically estimates the noise amount with respect to the target pixel based upon the target pixel value thus subjected to the noise reduction processing by the first noise reduction unit; and a second noise reduction unit which performs noise reduction processing on the target pixel based upon the target pixel value thus subjected to the noise reduction processing by the first noise reduction unit and the noise amount thus estimated by the noise estimation unit. | 09-03-2009 |
20100026859 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND COMPUTER READABLE STORAGE MEDIUM WHICH STORES IMAGE PROCESSING PROGRAM - An image processing apparatus includes a noise reduction unit which performs noise reduction processing to image signals, a first noise presumption unit which presumes a first noise amount from a present image signal among the image signals, and a second noise presumption unit which presumes a second noise amount based on the first noise amount, the present image signal, and the image signal of the past which underwent the noise reduction processing. The noise reduction unit performs the noise reduction processing to the present image signal based on the second noise amount. | 02-04-2010 |
20100188529 | IMAGE PROCESSING APPARATUS AND STORAGE MEDIUM STORING IMAGE PROCESSING PROGRAM - An image processing apparatus that performs noise reduction processing to image signals comprises a separation and extraction unit that separates a present image signal into a luminance signal and a color signal and extracts regions having a predetermined size sequentially, a representative luminance calculation unit that calculates a representative luminance value, a representative hue calculation unit that calculates a representative hue value of the region, a color noise estimation unit that estimates a color noise amount based upon the representative luminance value and the representative hue value, a differential color signal calculation unit that calculates a differential color signal from the color signal of the region and a color signal of a past region after noise reduction processing and a color noise reduction unit that performs color noise reduction processing to the color signal of the region based upon the color noise amount and the differential color signal. | 07-29-2010 |
20100201852 | IMAGE PROCESSING APPARATUS - An image processing apparatus includes a photographing condition estimation unit for estimating a photographing condition of the input image based on photometric information and focal information. A Y/C separation unit separates the input image into a luminance signal and a color difference signal; a luminance correction unit extracts an edge from the luminance signal and corrects the luminance signal by a gradation conversion curve; a color difference correction unit corrects the color difference signal based on luminance signals obtained before and after the gradation correction and a theoretical limit characteristic of color reproduction; a skin color correction unit performs skin color correction depending on the photographing condition; and a Y/C synthesis unit synthesizes the luminance signal and the color difference signal obtained after the correction. Gradation correction is performed on the input image such that appropriate hue and saturation are achieved while emphasizing a main object. | 08-12-2010 |
20100220223 | NOISE REDUCTION SYSTEM, IMAGE PICKUP SYSTEM AND COMPUTER READABLE STORAGE MEDIUM - A noise reduction system for performing noise reduction processing for an image signal taken in from an image pickup system, includes a local area extracting unit which sequentially extracts, from the image signal, a local area including a target pixel for which the noise reduction processing is performed; a first noise reducing unit which performs random noise reduction processing for the local area; a second noise reducing unit which performs impulsive noise reduction processing for the local area; and a combining unit which combines an image signal which has been subjected to the noise reduction processing by the first noise reducing unit and an image signal which has been subjected to the noise reduction processing by the second noise reducing unit. | 09-02-2010 |
20120033109 | IMAGE CAPTURING SYSTEM AND COMPUTER READABLE RECORDING MEDIUM FOR RECORDING IMAGE PROCESSING PROGRAM - An image capturing system includes: a first noise reduction unit which roughly removes the effects of an edge component by performing edge-preserving adaptive noise reduction processing on a target pixel within a local region including the target pixel and the neighboring pixels extracted from an image signal acquired from a CCD; a noise estimation unit which dynamically estimates the noise amount with respect to the target pixel based upon the target pixel value thus subjected to the noise reduction processing by the first noise reduction unit; and a second noise reduction unit which performs noise reduction processing on the target pixel based upon the target pixel value thus subjected to the noise reduction processing by the first noise reduction unit and the noise amount thus estimated by the noise estimation unit. | 02-09-2012 |
20120274754 | IMAGE PROCESSING DEVICE, ENDOSCOPE SYSTEM, INFORMATION STORAGE DEVICE, AND IMAGE PROCESSING METHOD - An image processing device has a first image acquisition section acquiring a first image which is an image that has information within a wavelength band of white light, a second image acquisition section acquiring a second image which is an image that has information within a specific wavelength band, an attention area detection section detecting an attention area within the second image based on a feature quantity of each pixel within the second image, a display state setting section performing a display state setting process that sets a display state of a display image generated based on the first image, and a designated elapsed time setting section performing a designated elapsed time setting process that sets a designated elapsed time based on a detection result for the attention area. The display state setting section performs the display state setting process based on the designated elapsed time. | 11-01-2012 |
20140300716 | ENDOSCOPE APPARATUS AND CONTROL METHOD FOR ENDOSCOPE APPARATUS - The endoscope apparatus includes a focus control section that performs a focus control process that controls a plurality of in-focus object plane position, the plurality of in-focus object plane positions being set discretely, a switch control section that switches the focus control process between an autofocus control process and a manual focus control process, and an operation section that is operated by a user, when the operation section has been operated by the user during a period in which the focus control section performs the autofocus control process, the switch control section switching the focus control process from the autofocus control process to the manual focus control process, and the focus control section moving the in-focus object plane position to an in-focus object plane position among the plurality of in-focus object plane positions that differs from the in-focus object plane position when the operation section has been operated. | 10-09-2014 |