Image generating apparatus, image generating method, and recording medium having the program stored thereon
An objective is recognition of the travel direction of an object captured in an image frame. An image generating apparatus includes: a receiver circuit that receives a single exposure frame created by a single exposure and a multiple exposure frame created by multiple exposures after the single exposure frame, the single exposure frame and the multiple exposure frame being output from an image sensor; and a control circuit that specifies a starting point of a motion track of an object in the multiple exposure frame in accordance with a position of the object in the single exposure frame and a position of the same object in the multiple exposure frame.
1. An image generating apparatus comprising:
a receiver circuit that receives a single exposure image including a position of an object created by a single exposure in a first frame and a multiple exposure image including multiple positions of the object created by multiple exposures in a second frame, the second frame being after the first frame, the single exposure image and the multiple exposure image being output from an image sensor, the image sensor including a shutter, the shutter being released once in the first frame to create the single exposure image, the shutter being released more than once in the second frame to create the multiple exposure image; and
a control circuit that specifies a starting point of a motion track of the object in the multiple exposure image that is closest to the position of the object in the single exposure image among the multiple positions of the object in the multiple exposure image, the starting point of the motion track being specified based on an order of the received single exposure image including the position of the object created by the single exposure in the first frame and the received multiple exposure image including the multiple positions of the object created by the multiple exposures in the second frame,
wherein the image sensor outputs the single exposure image including the position of the object and the multiple exposure image including the multiple positions of the object at a same frame rate.
2. The image generating apparatus according to claim 1 , wherein a common sensitivity is applied to each of the multiple exposures of the second frame.
3. The image generating apparatus according to claim 1 , wherein
the image sensor includes a high-sensitivity cell and a highly-saturated cell, the highly-saturated cell having a lower sensitivity and a larger charge storage capacity than the high-sensitivity cell, and
the single exposure image and the multiple exposure image are created by the highly-saturated cell.
4. The image generating apparatus according to claim 1 , wherein
the single exposure image and the multiple exposure image are created by a global shutter function of the image sensor.
5. An image generating method, comprising:
inputting, through an image sensor, a single exposure image including a position of an object created by a single exposure in a first frame and a multiple exposure image including multiple positions of the object created by multiple exposures in a second frame, the second frame being after the first frame, the image sensor including a shutter, the shutter being released once in the first frame to create the single exposure image, the shutter being released more than once in the second frame to create the multiple exposure image; and
specifying a starting point of a motion track of the object in the multiple exposure image that is closest to the position of the object in the single exposure image among the multiple positions of the object in the multiple exposure image, the starting point of the motion track being specified based on an order of the received single exposure image including the position of the object created by the single exposure in the first frame and the received multiple exposure image including the multiple positions of the object created by the multiple exposures in the second frame,
wherein the image sensor outputs the single exposure image including the position of the object and the multiple exposure image including the multiple positions of the object at a same frame rate.
6. A non-transitory recording medium storing a program that, when executed, causes a computer to:
receive a single exposure image including a position of an object created by a single exposure in a first frame and a multiple exposure image including multiple positions of the object created by multiple exposures in a second frame, the second frame being after the first frame, the single exposure image and the multiple exposure image being output from an image sensor, the image sensor including a shutter, the shutter being released once in the first frame to create the single exposure image, the shutter being released more than once in the second frame to create the multiple exposure image; and
specify a starting point of a motion track of the object in the multiple exposure image that is closest to the position of the object in the single exposure image among the multiple positions of the object in the multiple exposure image, the starting point of the motion track being specified based on an order of the received single exposure image including the position of the object created by the single exposure in the first frame and the received multiple exposure image including the multiple positions of the object created by the multiple exposures in the second frame,
wherein the image sensor outputs the single exposure image including the position of the object and the multiple exposure image including the multiple positions of the object at a same frame rate.