Method and System for Image Centering during Zooming
AssigneePelco
InventorChien-Min Huang
Life of this patent
Estimating the term…
Abstract
The methods and systems described herein are directed to image processing. More specifically, the image processing described herein may include centering an object in the field of view during zooming. The image processing methods and systems may further include setting a magnification factor, positioning the camera in a first field of view capturing a first image, setting a second magnification factor, and capturing a second image. Additionally, the described techniques may include altering the first image to determine an offset and adjusting the camera based on the offset.
Claims17
A method of centering an object in the field of view of a camera during zooming comprising the steps of setting a camera zoom to a first magnification factor so that the camera has a first field of view;
- positioning the camera so that an object is in a first position in the first field of view;
- capturing a first image with the camera at the first magnification factor;
- setting the camera zoom to a second magnification factor so that the camera has a second field of view with the second magnification factor being greater than the first magnification factor;
- capturing a second image with the camera at the second magnification factor;
- digitally altering a portion of the first image to create a third image that has a magnification factor equivalent to the second magnification factor;
- comparing the third image with the second image to determine the offset of the object from the first position of the object to the position of the object in the third image;
- and adjusting the camera based on the offset determined in the comparing step when the camera is zoomed.
A system for centering an object in the field of view of a camera comprising:
- a camera having a lens with a variable zoom;
- a lens controller connected to the lens to vary the zoom of the lens;
- an image sensor, the lens being positioned to provide light rays to the image sensor;
- an input for receiving an instruction to change the zoom of the lens;
- and a position controller for moving the camera;
- and
- a processor in communication with the camera to provide signals to the camera and to receive images captured by the camera, the processor being adapted to provide a signal to the lens controller to set the lens zoom to a first magnification factor so that the lens has a first field of view;
- to provide a signal to the position controller to position the camera so that an object is in a first position in the first field of view;
- to provide a signal to the camera to capture a first image with the camera at the first magnification factor;
- to provide a signal to set the camera zoom to a second magnification factor so that the camera has a second field of view with the second magnification factor being greater than the first magnification factor;
- to provide a signal to the camera to capture a second image with the camera at the second magnification factor;
- to receive the first image from the camera and to digitally alter a portion of the first image to create a third image that has a magnification factor equivalent to the second magnification factor;
- to receive the second image and to compare the third image with the second image to determine the offset of the object from the first position of the object to the position of the object in the third image;
- and to provide a signal to the position controller to adjust the camera based on the offset when the camera is zoomed.
A non-transitory computer readable medium comprising instructions configured to cause a processor to:
- set a camera zoom to a first magnification factor so that the camera has a first field of view;
- position the camera so that an object is in a first position in the first field of view;
- capture a first image with the camera at the first magnification factor;
- set the camera zoom to a second magnification factor so that the camera has a second field of view with the second magnification factor being greater than the first magnification factor;
- capture a second image with the camera at the second magnification factor;
- digitally alter a portion of the first image to create a third image that has a magnification factor equivalent to the second magnification factor;
- compare the third image with the second image to determine the offset of the object from the first position of the object to the position of the object in the third image;
- and adjust the camera based on the offset determined when the camera is zoomed.
Dependencies are inferred from the claim text.