IMAGING SYSTEM AND IMAGING METHOD FOR IMAGING A SAMPLE IN A MEDIUM CARRIED IN A CONTAINER AS AN IMAGING OBJECT

An imaging system for imaging a sample in a medium carried in a container as an imaging object, in which the imaging system includes an imager which obtains an original image by imaging the imaging object; and a data processor which generates multi-gradation image data by performing a gradation correction on the original image, wherein the data processor associates a luminance value corresponding to a luminance of the medium in the original image with a maximum gradation value in the gradation correction.