Abstract: Diffusion calculation is performed with a shorter processing time and superior precision.

Abstract: A method includes a pixel-value correction step that causes an average and variance of pixel values in a second subregion inclusive of a first subregion inclusive of being formed of only one pixel in a comparison image resolved into pixels to match with an average and variance of pixel values in a subregion corresponding to the second subregion on a reference image similarly resolved into pixels, thereby to execute calculation that corrects the pixel value of each pixel in the first subregion in the comparison image by recognizing each of subregions to be the first subregion, the subregions being obtained when the comparison image is divided into the subregions respectively inclusive of being formed of only one pixel; and a change determination step that determines the presence/absence of a change in the object by comparing the reference image with a post-correction comparison image acquired through the pixel value correction step.

Abstract: A method includes a pixel-value correction step that causes an average and variance of pixel values in a second subregion inclusive of a first subregion inclusive of being formed of only one pixel in a comparison image resolved into pixels to match with an average and variance of pixel values in a subregion corresponding to the second subregion on a reference image similarly resolved into pixels, thereby to execute calculation that corrects the pixel value of each pixel in the first subregion in the comparison image by recognizing each of subregions to be the first subregion, the subregions being obtained when the comparison image is divided into the subregions respectively inclusive of being formed of only one pixel; and a change determination step that determines the presence/absence of a change in the object by comparing the reference image with a post-correction comparison image acquired through the pixel value correction step.

Abstract: A gas-condition predicting device includes an auxiliary storage device for storing each atmospheric condition in association with gas flow-field data in a target area under the atmospheric condition; a meteorological-modeling unit for calculating, using a meteorological model calculation, meteorological parameters at a plurality of evaluation points defined in an enlarged area that includes the target area and that is larger than the target area; and an extraction unit for determining atmospheric conditions in the target area from the meteorological parameters calculated by the meteorological-modeling unit and extracting from the auxiliary memory device gas flow-field data corresponding to the atmospheric conditions.

Abstract: The present invention relates to a subject identification method which is adapted for performing an examination as to whether any change exists on an subject, or adapted for performing an estimation of a degree of the change on the subject. It is an aim that the examination and the estimation are performed with great accuracy. Residual signals are evaluated by means of letting an inverse filter interact with a standard and samples which may be out of the standard, so that a plurality of statistical variables are extracted, thereby testing or estimating as to whether a statistical significant difference exists between those two statistical variable groups.

Abstract: A semiconductor laser light modulation and demodulation system to be used in light communication system is realized. In the modulation system, strength modulated pressure wave or electromagnetic wave is directly applied to an active region of a semiconductor laser element and the frequency modulation is effected by varying an effective length of a laser resonator formed by the element. In the demodulation system, modulation signal is derived by an interference of the received laser light by splitting and then joining together after passing an interferometer having different path length arms.