Abstract: An image processor of an endoscope system comprises an input connector and a determination unit. The input connector is used for connecting one of a video signal output device that outputs a video signal that includes a synchronization signal and a non-video signal output device that outputs a non-video signal that does not include the synchronization signal, to the image processor. The determination unit determines which of the video signal output device or the non-video signal output device is connected to the image processor through the input connector.

Abstract: A processor, to which an endoscope is connectable, for processing signals generated by the endoscope into image data, the processor including a light source which supplies light to the endoscope connected to the processor to illuminate a target area via the endoscope so that the endoscope can capture an image of the illuminated target area and convert the image into the signals, and a memory. The processor is configured so that data stored in the memory can be rewritten from outside the processor via an external connection device connected to the processor.

Abstract: A processor, to which an endoscope is connectable, for processing signals generated by the endoscope into image data, includes a light source which supplies light to the endoscope connected to the processor to illuminate a target area via the endoscope so that the endoscope can capture an image of the illuminated target area and convert the image into the signals, and an internal memory for storing at least still-image data obtained from the image data.