Abstract: An image processing device includes: a processor; and a memory encoded with instructions executed by the processor, including: imaging pluripotent stem cells with time in a culture process and acquiring a plurality of images, extracting a colony region of the cells from the image, extracting a high luminance region on the basis of a group of pixels with larger luminance values than a standard value from among pixels constituting the image, extracting an extraction target region with relatively high contrast in the colony region on the basis of the colony and high luminance regions, and outputting the extraction target region as an extraction result, wherein as a relationship among the colony, high luminance, and extraction target regions, the colony region is formed, the high luminance region is then formed therein, and the extraction target region is then formed in the high luminance region in the culture process of the cells.

Abstract: A displacement meter for suppressing errors occurring in sub-pixel estimation, comprising: alight source that illuminates an object; an image pickup unit for receiving diffused-reflected light from the object; and a calculation unit for calculating the a displacement amount of the object by using sub-pixel estimation and the cross-correlation function between reference image data and measurement image data, wherein an image acquired during a predetermined timing from the imaging unit serves as the reference image data and an image acquired during the next timing serves as the measurement image data, generates a correction displacement amount by subtracting a correction value from the displacement amount, sets the most recent measurement image data as the reference image data and sets a predetermined initial value as the correction value if the displacement amount meets a predetermined condition, and else sets the displacement amount obtained most recently as the correction value.

Abstract: A method for generating a learned model that performs an image transformation disclosed in the present description includes a step of learning mapping of a source to a target using a first image group as the source and at least one phase contrast image as the target, the first image group including a first image set having microscopic images of a biological sample captured at different positions along a first optical axis, the microscopic images being other than phase contrast images.

Abstract: To provide a measurement apparatus and the like that suppresses an error caused by an image used for measurement, and that enables measurement with a high accuracy, in a measurement apparatus, a measurement unit is configured to calculate a measurement value with respect to a measurement target by using a cross-correlation function of two images of the measurement target acquired by an image capturing element, and a correction unit is configured to correct the measurement value according to a configuration of a spatial frequency component of the two images.

Abstract: A displacement meter that measures displacement of an object includes a calculation circuit which calculates a displacement amount of the object using a cross-correlation function of plural images detected at different timings by a photoelectric conversion element array. The calculation circuit performs a Fourier transform on the images, applies a band-pass filter to the images having undergone the Fourier transform, and calculates the cross-correlation function using the images to which the band-pass filter has been applied. Assuming that a magnification of a light-receiving optical assembly is M, the number of pixels in the photoelectric conversion element array is N, and a pixel pitch is P (um), a low cut-off frequency HPF of the band-pass filter and a high cut-off frequency LPF of the band-pass filter satisfy: 3M/(N×P)?HPF?10M/(N×P), 40M/(N×P)?LPF?60M/(N×P).

Abstract: A displacement meter configured to measure a displacement of a measurement target object includes an illumination assembly configured to illuminate the measurement target object, a photoelectric conversion element array configured to detect reflected light from the measurement target object, and a calculation circuit configured to calculate an amount of the displacement of the measurement target object by using a cross-correlation function of a plurality of images acquired at different timings by the photoelectric conversion element array. The calculation circuit limits a detection range, where the calculation circuit performs processing for detecting a position indicating a peak of the cross-correlation function, to a part of an entire range of the cross-correlation function, detects the position indicating the peak in the limited detection range, and calculates the amount of the displacement based on the detected position indicating the peak.

Abstract: A displacement meter for suppressing errors occurring in sub-pixel estimation, comprising: alight source that illuminates an object; an image pickup unit for receiving diffused-reflected light from the object; and a calculation unit for calculating the a displacement amount of the object by using sub-pixel estimation and the cross-correlation function between reference image data and measurement image data, wherein an image acquired during a predetermined timing from the imaging unit serves as the reference image data and an image acquired during the next timing serves as the measurement image data, generates a correction displacement amount by subtracting a correction value from the displacement amount, sets the most recent measurement image data as the reference image data and sets a predetermined initial value as the correction value if the displacement amount meets a predetermined condition, and else sets the displacement amount obtained most recently as the correction value.

Abstract: A cell tracking method for performing cell tracking on the basis of a plurality of cell images captured in time series, including an extraction process of extracting a tracking region corresponding to the cell for each cell images; a tracking process of calculating a change information in a position of the extracted tracking region and tracking the cell on the basis of the change information; a determination process of determining whether or not the cell as a tracking target is in a cell division state on the basis of the cell image; and an analysis process of analyzing a movement state of the cell on the basis of the change information from which the change information in a period of the cell division state is excluded when the cell is determined to be in the cell division state in the determination process.

Abstract: An evaluation device includes a state determination unit which is configured to determine a state of cells which are an observation target under non-standard conditions on the basis of information acquired from an image of cells under standard conditions.

Abstract: The present invention provides a method for evaluating the taxic behavior of nematodes in response to an odor substance based on olfactory sense, and a dish and a behavior evaluation system to be used for the evaluation method. [Solution] Provided is a method for evaluating the taxic behavior of nematodes in response to odor of a test sample, the method including: a) providing a dish in which the test sample is arranged on the bottom surface, and nematodes are arranged in a region or a site of the bottom surface 1 cm to 3 cm away from the test sample; b) observing the arrangement of the nematodes on the bottom surface at 3 to 15 minutes after the later one of the test sample or the nematodes is arranged; and c) evaluating whether the nematodes show attraction behavior or avoidance behavior in response to the test sample, from the arrangement of the nematodes observed, and a dish or a taxic behavior evaluation system suitable for the method.

Abstract: An image processing device includes: a processor; and a memory encoded with instructions executed by the processor, including: imaging pluripotent stem cells with time in a culture process and acquiring a plurality of images, extracting a colony region of the cells from the image, extracting a high luminance region on the basis of a group of pixels with larger luminance values than a standard value from among pixels constituting the image, extracting an extraction target region with relatively high contrast in the colony region on the basis of the colony and high luminance regions, and outputting the extraction target region as an extraction result, wherein as a relationship among the colony, high luminance, and extraction target regions, the colony region is formed, the high luminance region is then formed therein, and the extraction target region is then formed in the high luminance region in the culture process of the cells.

Abstract: A passage timing calculation device includes a processor and a memory encoded with instructions executed by the processor, wherein the instructions causing the processor to perform operations comprising calculating a time change in an area occupied by an extraction target region that is a region in which a striated pattern appears from a plurality of images of pluripotent stem cells captured at different times, detecting a change point of the time change in an area occupied by the extraction target region, and calculating a passage timing of the pluripotent stem cells on the basis of the change point.

Abstract: A displacement meter includes: a light source; an illumination optical system which forms a light intensity distribution at a predetermined position on an optical axis by using light from the light source such that a light intensity at a peripheral portion of the light intensity distribution is stronger than a light intensity at a center portion of the light intensity distribution; a light deflection portion which has an opening on the optical axis and a reflection part reflecting light of the light intensity distribution formed by the illumination optical system at the predetermined position; a first lens unit which collects light reflected by the reflection part and illuminates a measurement object; a sensor array which detects light reflected by the measurement object and passing through the opening of the light deflection portion through the first lens unit; and a measurement unit which detects a displacement of the measurement object by using outputs of the sensor array at different timings.

Abstract: An image processing device includes an image processing unit that performs image processing on an observed image in which a cell is imaged and an image processing method selector that is configured to determine an observed image processing method for analyzing the imaged cell on the basis of information of a processed image obtained through image processing of the image processing unit.

Abstract: An image processing device includes: an associating unit configured to associate information on an identification element used to identify a cell in imaged cell information with information on a non-identification element serving as an element of the cell which is not the identification element on the basis of the information on the identification element and information of the non-identification element; and a status determination unit configured to determine a cell status on the basis of the information on the identification element and the information on the non-identification element associated together by the linking unit.

Abstract: A measurement apparatus measures an optical characteristic with high robustness and with a simple configuration. A measurement apparatus of the present invention measures optical characteristic of a sample. The measurement apparatus includes an irradiation unit to irradiate the sample with light emitted from a light source and transmitted through an opening member, an imaging unit to detect an image formed by the light irradiated by the irradiation unit and reflected by the sample, and a processing unit to obtain the optical characteristic of the sample on the basis of an output of the imaging unit. The opening member comprises plural openings through which the light emitted from the light source is transmitted, the irradiation unit irradiates the sample with the light transmitted through the plurality of openings, and the imaging unit detects an image formed by the light transmitted through the plurality of openings and reflected by the sample.

Abstract: A measurement apparatus measures an optical characteristic with high robustness and with a simple configuration. A measurement apparatus of the present invention measures optical characteristic of a sample. The measurement apparatus includes an irradiation unit to irradiate the sample with light emitted from a light source and transmitted through an opening member, an imaging unit to detect an image formed by the light irradiated by the irradiation unit and reflected by the sample, and a processing unit to obtain the optical characteristic of the sample on the basis of an output of the imaging unit. The opening member comprises plural openings through which the light emitted from the light source is transmitted, the irradiation unit irradiates the sample with the light transmitted through the plurality of openings, and the imaging unit detects an image formed by the light transmitted through the plurality of openings and reflected by the sample.

Abstract: The present invention provides a method for evaluating the taxic behavior of nematodes in response to an odor substance based on olfactory sense, and a dish and a behavior evaluation system to be used for the evaluation method. [Solution] Provided is a method for evaluating the taxic behavior of nematodes in response to odor of a test sample, the method including: a) providing a dish in which the test sample is arranged on the bottom surface, and nematodes are arranged in a region or a site of the bottom surface 1 cm to 3 cm away from the test sample; b) observing the arrangement of the nematodes on the bottom surface at 3 to 15 minutes after the later one of the test sample or the nematodes is arranged; and c) evaluating whether the nematodes show attraction behavior or avoidance behavior in response to the test sample, from the arrangement of the nematodes observed, and a dish or a taxic behavior evaluation system suitable for the method.

Abstract: A biological specimen observation apparatus whereby observation of a biological specimen can be performed accurately. In macro observation, a biological change region is extracted from a macro image, a micro observation point corresponding to an extracted biological change region is registered, and an object for tracking is identified. In micro observation, it is judged from the micro image whether or not biological change has continued in the biological change region at the micro observation point, and the registered micro observation point is updated on the basis of this judgment result. It is possible to carry out both macro observation for detecting a biological change region and micro observation for observing the progress of growth of a partial minute region where biological change has been exhibited, and to carry out accurate observation of a biological specimen.

Abstract: A velocimeter configured to detect light modulated by a moving object with a Doppler effect and measure a velocity of the object includes a detector configured to detect the light, and a processor configured to perform binarization of a signal obtained by the detector, and measure a time duration over a predetermined number of pulse intervals in the signal obtained by the binarization to obtain a measurement value of the velocity. The processor is configured to determine the measurement value as an error based on a change in an index relating to the time duration.