| 摘要 |
An image obtaining method and apparatus for an endoscope apparatus wherein reductions to the gradations of the image data borne by the analog signal are suppressed and digital values having a narrower dynamic range are obtained when the photoelectrically converted and outputted analog signal is converted to digital values. A living tissue is irradiated by an illuminating light and an excitation light, which are each emitted at different timings; whereupon a fluorescent image formed of the fluorescent light emitted from the living tissue and a standard image formed of the reflected light reflected from the living tissue are received, converted to respective analog signals, and outputted by the same photoelectric converting element. In converting these analog signals to digital values, the analog signal representing the fluorescent image is amplified by a larger gain than that representing the standard image.
|
