High-Speed Camera

A high-speed camera comprising:

• an imager unit that sequentially images a target video image at a set exposure timing;
• a video recording memory that is divided into a plurality of segments, each of the segments consecutively shifting to the next segment in order so that writing is performed thereinto, the writing into each of the segments being performed and overwriting is performed in a ring buffer shape until the writing is stopped;
• a video recording unit that sequentially video-records the video image imaged by the imager unit as an image frame of digital data into the video recording memory and stops, when video-recording a predetermined number of image frames set in a video recording stop unit, the video recording in the video recording memory using the video recording stop unit on the basis of input of a trigger signal, to leave the predetermined number of image frames in the video recording memory;
• a video-recorded image frame number setting unit in which predetermined numbers of image frames, respectively preceding and succeeding the image frame at the time when the trigger signal is inputted, to be recorded on the basis of the input of the trigger signal are previously set;
• region information management means for storing segment information about in which of the segments the image frames are recorded and image frame information about in which of positions of each of the segments each of the image frames is recorded;
• and
• image frame management means for acquiring predetermined numbers of image frames respectively preceding and succeeding the image frame at the time when the trigger signal is inputted in the certain segment, which are previously set by the video-recorded image frame number setting unit, on the basis of image frame information of the segment into which the trigger signal is inputted and image frame information of the other segment that are stored by the region information management means.