Method of controlling image acquisition and other related tools
The present disclosure provides a method for image capturing, a method for image capturing control and associated apparatuses. The method for image capturing includes: obtaining Region Of Interest (ROI) information of a target ROI corresponding to a current frame of image; buffering captured pixel data of the current frame of image; obtaining, when determining that the pixel data of the current frame of image has been buffered completely, pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information if the ROI information of the target ROI corresponding to the current frame of image can be obtained; and outputting the pixel data associated with the target ROI.
1. A method for image capturing, comprising:
obtaining Region Of Interest (ROI) information of a target ROI corresponding to a current frame of image;
buffering captured pixel data of the current frame of image;
obtaining, when determining that the pixel data of the current frame of image has been buffered completely, pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information if the ROI information of the target ROI corresponding to the current frame of image can be obtained;
outputting the pixel data associated with the target ROI; and
subsequent to determining that the pixel data of the current frame of image has been buffered completely, if the ROI information of the target ROI corresponding to the current frame of image cannot be obtained, combining n*m pieces of adjacent pixel data in the pixel data of the current frame of image into one piece of pixel data sequentially, to obtain compressed pixel data associated with the current frame of image, and outputting the compressed pixel data, where n is a natural number divisible by a total number of rows in the current frame of image, and m is a natural number divisible by a total number of columns in the current frame of image.
2. The method of claim 1 , wherein said obtaining the pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information comprises:
determining the pixel data associated with the target ROI in the pixel data of the current frame of image based on the ROI information;
determining a storage address of the pixel data associated with the target ROI in a buffer; and
reading the pixel data from the storage address to obtain the pixel data associated with the target ROI.
3. An apparatus for image capturing, comprising:
a parameter obtaining unit configured to obtain Region Of Interest (ROI) information of a target ROI corresponding to a current frame of image;
a pixel data receiving unit configured to buffer captured pixel data of the current frame of image;
an obtaining unit configured to obtain, when determining that the pixel data of the current frame of image has been buffered completely, pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information if the ROI information of the target ROI corresponding to the
current frame of image can be obtained from the parameter obtaining unit, and transmit the pixel data associated with the target ROI to a transmitting unit; and
the transmitting unit configured to output the pixel data associated with the target ROI, wherein the obtaining unit is further configured to, if the ROI information of the target ROI corresponding to the current frame of image cannot be obtained from the parameter obtaining unit: combine n*m pieces of adjacent pixel data in the pixel data of the current frame of image into one piece of pixel data sequentially, to obtain compressed pixel data associated with the current frame of image, and transmit the compressed pixel data to the transmitting unit, where n is a natural number divisible by a total number of rows in the current frame of image, and m is a natural number divisible by a total number of columns in the current frame of image, and
the transmitting unit is further configured to output the compressed pixel data associated with the current frame of image.
4. The apparatus of claim 3 , wherein the obtaining unit is configured to obtain the pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information by:
determining the pixel data associated with the target ROI in the pixel data of the current frame of image based on the ROI information;
determining a storage address of the pixel data associated with the target ROI in a buffer; and
reading the pixel data from the storage address to obtain the pixel data associated with the target ROI.
5. A camera, comprising:
an image sensor configured to capture pixel data of a current frame of image in accordance with a predetermined camera parameter and transmit the captured pixel data to an apparatus for image capturing; and
the apparatus for image capturing configured to obtain Region Of Interest (ROI) information of a target ROI corresponding to the current frame of image is configured to:
receive the pixel data of the current frame of image from the image sensor and buffer the pixel data;
obtain, when determining that the pixel data of the current frame of image has been buffered completely, pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information if the ROI information of the target ROI corresponding to the current frame of image can be obtained;
output the pixel data associated with the target ROI; and
if the ROI information of the target ROI corresponding to the current frame of image cannot be obtained:
combine n*m pieces of adjacent pixel data in the pixel data of the current frame of image into one piece of pixel data sequentially, to obtain compressed pixel data
associated with the current frame of image, and output the compressed pixel data, where n is a natural number divisible by a total number of rows in the current frame of image, and m is a natural number divisible by a total number of columns in the current frame of image.
6. A system for image capturing, comprising:
an apparatus for image capturing control configured to
predict a position region in which a target object is to be located in a next frame of image based on an object tracking result associated with a previous frame of image, and
determine the position region as a target Region of Interest (ROI) corresponding to the next frame of image; and transmit ROI information of the target ROI corresponding to the next frame of image to a camera; and
the camera configured to obtain ROI information of a target ROI corresponding to a current frame of image from the apparatus for image capturing control;
capture pixel data of the current frame of image in accordance with a predetermined camera parameter and buffer the pixel data of the current frame of image;
obtain, when determining that the pixel data of the current frame of image has been buffered completely, pixel data associated with the target ROI from the buffered pixel data of the current frame of image based on the ROI information if the ROI information of the target ROI corresponding to the current frame of image can be obtained; and output the pixel data associated with the target ROI, wherein the camera is further configured to, if the
ROI information of the target ROI corresponding to the current frame of image cannot be obtained:
combine n*m pieces of adjacent pixel data in the pixel data of the current frame of image into one piece of pixel data sequentially, to obtain compressed pixel data associated with the current frame of image, and output the compressed pixel data,
where n is a natural number divisible by a total number of rows in the current frame of image, and m is a natural number divisible by a total number of columns in the current frame of image.