Abstract:
An endoscope system includes: an image pickup apparatus in which an insertion portion including an objective optical system is detachable, the image pickup apparatus being configured to pick up an optical image of light from an observed object transmitted by the objective optical system of the insertion portion and to output the optical image as an image pickup signal; a focus changing section provided in the image pickup apparatus and including a drive section that can change focus of the image pickup apparatus; a control section configured to generate a control signal for automatically controlling the optical image in a focused state for the drive section of the focus changing section in a state in which the insertion portion is fitted to the image pickup apparatus; and an optical characteristic acquiring section configured to acquire an optical characteristic of the insertion portion used by the control section to generate the control signal.
Abstract:
An endoscope apparatus, an endoscope apparatus operation device, a method for controlling an endoscope apparatus, and the like are disclosed that simplify a process that switches a focus control process between an autofocus control process and a manual focus control process. The endoscope apparatus includes a focus control section (130) that performs a focus control process that controls an in-focus object plane position by controlling an optical system, a switch control section (120) that switches the focus control process between an autofocus control process and a manual focus control process, and an operation section (102) that is operated by a user, when the operation section (102) has been operated by the user during a period in which the focus control section (130) performs the autofocus control process, the switch control section (120) switching the focus control process from the autofocus control process to the manual focus control process, and the focus control section (130) moving the in-focus object plane position to a position that differs from the in-focus object plane position when the operation section (102) has been operated.
Abstract:
An imaging system comprising an extracting section for extracting a block area of predetermined size from a signal outputted from an imaging device, a converting section for converting the signal of the extracted block area into a signal in a frequency space, an estimating section for estimating the noise quantity of the frequency components other than the zero-order component of the converted signal on the basis of the zero-order component, a noise reducing section for reducing noise concerning the frequency components other than the zero-order components according to the noise quantity, and a compressing section for compressing the zero-order component and the noise-reduced frequency components other than the zero-order component.
Abstract:
A noise reduction system has a color signal separation and extraction unit for sequentially extracting a local area including a target pixel for which noise reduction processing is to be performed from an image signal, a first noise reduction unit for performing random noise reduction processing for the local area, a second noise reduction unit for performing impulsive noise reduction processing for the local area, and a combining unit for combining the image signal which has been subjected to the noise reduction processing at the first noise reduction unit and the image signal which has been subjected to the noise reduction processing at the second noise reduction unit.
Abstract:
A calculation unit (112) acquires a dedicated base vector based on a known spectral characteristic of a subject as an identification target having the known spectral characteristic from a base vector ROM (114), and acquires a spectral characteristic of an imaging system including a spectral characteristic concerning a color imaging system used for image acquisition of subjects including the subject as the identification target and a spectral characteristic concerning illumination light used when image acquisition of the subjects by the color imaging system from a system spectral characteristic ROM (115). Then, it calculates a weighting factor concerning the dedicated base vector based on an image signal obtained by image acquisition of the subject by the color imaging system, the dedicated base vector, and the spectral characteristic of the imaging system. A normalization unit (116) calculates an identification result of the subject which is the identification target having the known spectral characteristic based on the weighting factor concerning the dedicated base vector, and outputs it as an output signal by an output unit (117).
Abstract:
An imaging system comprises a color noise estimating unit (14) and a color noise reducing unit (13). The color noise estimating unit (14) is composed of a local region extracting section (26) for calculating a luminance signal and a color difference signal in units of, e.g., 4×4 pixels from a signal of a CCD having a color filter, an average luminance calculating section (28) for calculating the average luminance from the luminance signal, a temperature estimating section (24) for estimating the temperature T of the CCD from a signal of an OB region, a gain calculating section (29) for calculating the gain G of the CCD from information in a control unit (18), and a coefficient calculation section (31) and a function calculation section (33) for estimating the amount of color noise from the average luminance on the basis of formulation using the temperature T and the gain G. The color noise reducing unit (13) reduces the color nose in the color difference signal in units of 4×4 pixels according to the amount of color noise estimated by the color noise estimating section (14).