Abstract:
To accurately position multiple tomographic images, an image processing apparatus (190) includes a detecting unit configured to detect motion of an eye (S104) in a plurality of polarization-sensitive tomographic images (501, 503), based on a predetermined region extracted from the plurality of polarization-sensitive tomographic images of the eye (S104), and a positioning unit (190) configured to position a plurality of tomographic luminance images (S105) corresponding to the plurality of polarization-sensitive tomographic images, based on the detected movement.
Abstract:
An imaging apparatus capturing optical coherence tomographic images of a test object based on a plurality of combined light beams that are obtained by combining a plurality of return light beams from the test object irradiated with a plurality of measurement light beams and a plurality of reference light beams respectively corresponding to the plurality of measurement light beams, the apparatus including: an instruction unit configured to give instructions about amounts of changes in respective optical path length differences between the plurality of reference beams and the plurality of return light beams; and a change unit configured to change the optical path length differences based on the amounts of changes instructed by the instruction unit.
Abstract:
An OCT imaging apparatus includes a diffraction grating 141 that divides an incident light for each wavelength, a line sensor 139 that receives the divided light and converts it into an electric signal, a motor-driven stage 210 that adjusts a relative position between a light-receiving surface of the line sensor 139 and the light, and a display control unit 125 that displays a spectrum of the light which a sensor receives corresponding to adjustment, wherein an interference light of a measurement light and a reference light is properly aligned relative to the sensor.
Abstract:
The present invention aims to provide image processing device and method capable of generating a difference image at high speed without occurring misregistration. To achieve this, in the image processing device and method, plural regions of interest are set respectively to input first and second images, a shift vector indicating a misregistration amount between the first and second images is calculated with respect to each of the regions of interest, a filter process is executed to the shift vector, the filter-processed shift vector is interpolated, the first and second images are registered based on the interpolated shift vector, and a subtraction operation is executed between corresponding pixels on the respective registered images to acquire the difference image.
Abstract:
This invention realizes accurate positional offset correction between a plurality of tomograms captured by using a tomography apparatus. The invention is a tomography apparatus which corrects the positional offsets between a plurality of two-dimensional tomograms constituting a three-dimensional tomogram. This apparatus includes a tomogram analysis unit (120) which extracts feature amounts representing the tissue of a measurement target, a tomogram selection unit (140) which selects a standard two-dimensional tomogram from the plurality of two-dimensional tomograms based on the feature amounts, and a tomogram position correction unit (150) which calculates the positional offset amount between the nth two-dimensional tomogram adjacent to the standard two-dimensional tomogram and the (n−1)th two-dimensional tomogram.
Abstract:
An X-ray imaging apparatus is provided with a multi X-ray source and a collimator in which a plurality of slits for X-rays to pass through are two-dimensionally formed, the size and position of the slits being adjustable. A control unit, as a first control mode, controls the size and position of the slits to move an examination region in parallel, when an X-ray source is changed to a different X-ray source, such that the examination directions are parallel before and after the change. Also, the control unit, as a second control mode, controls the size and position of the slits to rotate the examination direction, when an X-ray source is changed to a different X-ray source, such that the center of the examination regions is the same before and after the change.
Abstract:
There are provided an image processing method and apparatus, characterized in that an input image signal having a number L1 of gradation levels is converted into an image signal having a number L2 (