Method for acquiring images of a moving object and corresponding device
AssigneeSTMicroelectronics (Grenoble 2) SAS
InventorArnaud DELEULE
Life of this patent
Estimating the term…
Abstract
At least one image of a moving object is acquired using an image acquisition device equipped with an automatic focussing system. A distance between the object and the device when the effective acquisition of the image occurs is estimated based on the estimated speed and on the period of time separating a time of actuation triggering the process for acquiring the at least one image from the time of acquisition of the said effective acquisition, and the taking into account of the said distance by the automatic focussing system.
Claims21
A method, comprising:
- estimating, using an image acquisition device, a speed of a moving object;
- estimating, by the image acquisition device, a distance between the image acquisition device and the moving object at an effective image acquisition time based on the estimated speed of the moving object and a period of time between a time of activation of an image acquisition cycle of the image acquisition device and the effective image acquisition time;
- setting, by the image acquisition device, a focus of the image acquisition device based on the estimated distance;
- and
- acquiring, by the image acquisition device, an image of the moving object at the effective acquisition time using the focus set by the image acquisition device.
A device, comprising:
- one or more inputs and one or more outputs;
- and
- circuitry, coupled to at least one of the one or more inputs and to at least one of the one or more outputs, and which, in operation:
- estimates a speed of a moving object with respect to the device;
- estimates a distance between the device and the moving object at an effective image acquisition time based on the estimated speed of the moving object and a period of time between a time of activation of an image acquisition cycle and the effective image acquisition time;
- and
- sets a focus to acquire an image of the moving object based on the estimated distance.
A system, comprising:
- image acquisition circuitry, which, in operation, acquires images of objects;
- objective optics including at least one lens;
- and
- auto-focus circuitry, which, in operation:
- estimates a speed of a moving object relative to the objective optics;
- estimates a distance between the objective optics and the moving object at an effective image acquisition time based on the estimated speed of the moving object and a period of time between a time of activation of an image acquisition cycle of the image acquisition circuitry and the effective image acquisition time;
- and sets a focus of the at least one lens based on the estimated distance.
A computer-readable memory medium containing contents which when executed by an image acquisition device cause the image acquisition device to perform a method, the method comprising:
- estimating a speed of a moving object in a field of view of the image acquisition device;
- estimating a distance between the image acquisition device and the moving object at an effective image acquisition time based on the estimated speed of the moving object and a period of time between a time of activation of an image acquisition cycle of the image acquisition device and the effective image acquisition time;
- setting a focus of the image acquisition device based on the estimated distance;
- and
- acquiring an image of the moving object at the effective acquisition time using the focus set by the image acquisition device.
Dependencies are inferred from the claim text.