Method for reading out a high dynamic range image and device using the same
View Patent ↗A method for reading out a high dynamic range image in an image sensor comprises: resetting a pixel array row by row from an initial row of the pixel array to process a first integration treatment for a first image when reaching a first start time; resetting the pixel array row by row from the initial row of the pixel array to process a second integration treatment for the first image when reaching a second start time; and resetting the pixel array row by row from the initial row of the pixel array to process a first integration treatment for a second image when reaching a third start time.
1. A method for reading out a high dynamic range image in an image sensor including a pixel array including a plurality of pixels arranged in columns and rows, comprising:
confirming a first integration time and a second integration time for the pixel array;
determining a first start time for resetting an initial row of the pixel array according to a first integration time T 1 of a first image;
determining a second start time for resetting the initial row of the pixel array according to a second integration time T 2 of the first image and a maximum second integration time M;
determining a third start time for resetting the initial row of the pixel array according to a first integration time T 3 of a second image;
resetting the pixel array row by row from the initial row of the pixel array to process a first integration treatment for the first image when reaching the first start time;
reading out first integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone the first integration treatment for the first integration time T 1 ;
resetting the pixel array row by row from the initial row of the pixel array to process a second integration treatment for the first image when reaching the second start time;
reading out second integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone the second integration treatment for the second integration time T 2 ; and
resetting the pixel array row by row from the initial row of the pixel array to process a first integration treatment for a second image when reaching the third start time;
wherein the first integration time T 1 is greater than the second integration time T 2 .
2. A device for reading out a high dynamic range image, comprising:
a pixel array including a plurality of pixels arranged in columns and rows;
a calculating unit configured to calculate and determine a first integration time and a second integration time according to output image information; and
a first and second integration processing unit, configured to:
determine a first start time for resetting an initial row of the pixel array according to a first integration time T 1 of a first image;
determine a second start time for resetting the initial row of the pixel array according to a second integration time T 2 of the first image and a maximum second integration time M which is a odd number;
determine a third start time for resetting the initial row of the pixel array according to a first integration time T 3 of a second image;
reset the pixel array row by row from the initial row of the pixel array to process a first integration treatment for the first image when reaching the first start time;
read out first integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone the first integration treatment for the first integration time T 1 ;
reset the pixel array row by row from the initial row of the pixel array to process a second integration treatment for the first image when reaching the second start time;
read out second integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone the second integration treatment for a second integration time T 2 ; and
reset the pixel array row by row from the initial row of the pixel array to process a first integration treatment for a second image when reaching the third start time;
wherein the first integration time T 1 is greater than the second integration time T 2 .
3. A method for reading out a high dynamic range image in an image sensor, comprising:
resetting a pixel array row by row from an initial row of the pixel array to process a first integration treatment for a first image when reaching a first start time;
reading out first integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone a first integration treatment for a first integration time T 1 ;
resetting the pixel array row by row from the initial row of the pixel array to process a second integration treatment for the first image when reaching a second start time;
reading out second integration image data of the first image of the pixel array row by row from the initial row of the pixel array when the initial row has undergone the second integration treatment for a second integration time T 2 ; and
resetting the pixel array row by row from the initial row of the pixel array to process the first integration treatment for a second image when reaching a third start time.