IMAGE PROCESSING DEVICE AND METHOD, AND PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To perform stable exposure control when acquiring a composite image of a wide dynamic range by compositing a short exposure image and a long exposure image, even in the case that a long time is taken in a change in actual aperture opening to a change in a set value of the aperture opening and that there is no reproductivity in the actual aperture opening regardless of the application of an aperture control signal showing a set value of the same aperture opening.SOLUTION: In the case that a determination result in which a comparison result between a short exposure image brightness index value generated on the basis of a distribution of pixel values of a short exposure image and a threshold satisfies a prescribed condition continues the prescribed number of times, it is determined that a transition between candidate values of aperture opening is necessary. In the case that a determination result in which a comparison result between a long exposure image brightness index value generated on the basis of a distribution of pixel values of a long exposure image and a threshold satisfies a prescribed condition continues the prescribed number of times, it is determined that a transition between candidate values of an exposure ratio is necessary.SELECTED DRAWING: Figure 1