CALCULATION APPARATUS, PHASE VALUE OBTAINING SYSTEM, AND PHASE IMAGE OBTAINING METHOD

摘要

A calculation apparatus that integrates a differential phase image and obtains a phase image includes a weighting unit and an integration unit. The weighting unit performs weighting of a differential phase image that has a plurality of differential phase values, each of the differential phase values being obtained by using intensity information of a plurality of pixels included in one intensity distribution formed by a differential interferometer, and obtains a weighted differential phase image. The integration unit integrates the weighted differential phase image and obtains a phase image. The weighting unit performs weighting of the differential phase values in accordance with a position in the differential phase image, such that at least a part of differential phase values in end parts of the differential phase image is weighted more lightly than a differential phase value in a central part of the differential phase image.