Patent ID: 9398226
Filing Date: 2016-07-19
CPC Classification: B60R,G06K,H04N

Claim Text:
1. A zoom magnification calculation device included in an image-capturing device, the image capturing device being installed in a transportation vehicle and capturing an image of an object around the transportation vehicle, the zoom magnification calculation device comprising: a connector connected to a zoom drive circuit that drives an imaging optical system of the image-capturing device; a storage that associates a plurality of delay times with a plurality of zoom magnifications, each of the plurality of the delay times indicating each time from when the zoom magnification calculation device outputs each of the plurality of the zoom magnifications to the zoom drive circuit, till when the zoom drive circuit sets each of the plurality of the zoom magnifications to the imaging optical system; a first inputter that inputs, from the image-capturing device, an instruction for capturing the image of the object with one of the plurality of zoom magnifications; a second inputter that inputs, from the image-capturing device, first information that indicates a first relative distance from the object to the transportation vehicle at a time when the instruction is input from the image-capturing device; a third inputter that inputs, from the image-capturing device, second information that indicates a moving speed of the transportation vehicle when the instruction is input from the image-capturing device; a computation circuit that, based on the inputting of the instruction using i) one of the plurality of the delay times associated with the one of the plurality of the zoom magnifications, ii) the first relative distance, and iii) the moving speed, calculates a second relative distance in which the transportation vehicle becomes closer to the object than the first relative distance when the one of the plurality of the delay times lapsed, and calculates an adjusted zoom magnification corresponding to the second relative distance; and an outputter that outputs to the zoom drive circuit, the adjusted zoom magnification corresponding to the second relative distance.