Controlling a pan-tilt-zoom camera
AssigneeAxis AB
InventorsAxel Keskikangas, Song Yuan, John Rehn
Life of this patent
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Abstract
Methods and apparatus, including computer program products, for controlling a Pan-Tilt-Zoom (PTZ) camera. A video stream is provided by the PTZ camera. The video stream includes a main image and a smaller picture-in-picture overlay. The main image and the overlay show the same view. The overlay has both a higher frame rate and a lower resolution compared to the main image. A movement control instruction is received, by the PTZ camera, in response to an evaluation of at least one of the main image and the overlay.
Claims10
A method for controlling a Pan-Tilt-Zoom (PTZ) camera, comprising:
- providing, by the PTZ camera, a video stream comprising a main image and a smaller picture-in-picture overlay, wherein the main image and the overlay show the same view and wherein the overlay has both a higher frame rate and a lower resolution compared to the main image;
- and
- receiving, by the PTZ camera, a movement control instruction in response to an evaluation of at least one of the main image and the overlay;
- wherein providing the video stream comprises:
- receiving image data captured by the PTZ camera;
- using the received image data as image data of a main image;
- scaling down the received image data to create an overlay picture having a desired size and resolution;
- positioning the first overlay picture onto the main image;
- and
- encoding the main image and overlay picture as a series of intra-frame and inter-frame pictures to create the video stream.
A system for controlling a Pan-Tilt-Zoom (PTZ) camera, comprising:
- a memory;
- and
- a processor,
- wherein the memory contains instructions that when executed by the processor causes the processor to perform a method that includes:
- providing, by the PTZ camera, a video stream comprising a main image and a smaller picture-in-picture overlay, wherein the main image and the overlay show the same view and wherein the overlay has both a higher frame rate and a lower resolution compared to the main image;
- and
- receiving, by the PTZ camera, a movement control instruction in response to an evaluation of at least one of the main image and the overlay;
- wherein providing the video stream comprises:
- receiving image data captured by the PTZ camera;
- using the received image data as image data of a main image;
- scaling down the received image data to create an overlay picture having a desired size and resolution;
- positioning the first overlay picture onto the main image;
- and
- encoding the main image and overlay picture as a series of intra-frame and inter-frame pictures to create the video stream.
A computer program product for controlling a Pan-Tilt-Zoom (PTZ) camera, comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions being executable by a processor to perform a method comprising:
- providing, by the PTZ camera, a video stream comprising a main image and a smaller picture-in-picture overlay, wherein the main image and the overlay show the same view and wherein the overlay has both a higher frame rate and a lower resolution compared to the main image;
- and
- receiving, by the PTZ camera, a movement control instruction in response to an evaluation of at least one of the main image and the overlay;
- wherein providing the video stream comprises:
- receiving image data captured by the PTZ camera;
- using the received image data as image data of a main image;
- scaling down the received image data to create an overlay picture having a desired size and resolution;
- positioning the first overlay picture onto the main image;
- and
- encoding the main image and overlay picture as a series of intra-frame and inter-frame pictures to create the video stream.
Dependencies are inferred from the claim text.