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US 11,889,195 B2Granted
Image sensing system and operating method thereof
AssigneeSK hynix Inc.
InventorsSang Young Lee, Chul Hoon Kim, Kyoung Mook Lim, Keun Soo Cho
Life of this patent
Estimating the term…
Abstract
Disclosed is an image sensing system including an image sensor suitable for generating first actual brightness values corresponding to a captured image; and an image processor suitable for compensating for the first actual brightness values for each brightness period in a single frame period based on compensation information corresponding to a linearity error.
Claims21
An image sensing system comprising:
- an image sensor suitable for generating first actual brightness values corresponding to a captured image;
- and
- an image processor suitable for sorting the first actual brightness values for each brightness period, generating a result signal corresponding to the sorted result, and compensating for the first actual brightness values for each brightness period based on the result signal and compensation information corresponding to a linearity error, wherein the compensation information represents a slope difference for each brightness period between an actual slope and a reference slope.
An image sensing system comprising:
- a compensator suitable for determining each brightness period and differently compensating for first actual brightness values generated by an image sensor, for the each brightness period, based on a slope difference between an actual slope representing a relationship between an exposure time and an actual brightness value and a reference slope representing a relationship between the exposure time and a reference brightness value;
- and
- a controller suitable for calculating the slope difference for each brightness period based on second actual brightness values generated by the image sensor.
An image sensing system comprising:
- an image sensor suitable for generating first and second actual brightness values corresponding to a captured image during first and second periods;
- a controller suitable for determining an actual slope based on an exposure time and the second actual brightness value, determining a reference slope based on the exposure time and the actual slope, and determining a slope difference between the reference slope and the actual slope;
- and
- a compensator suitable for dividing the slope difference into multiple linear functions of multiple brightness periods and compensating for the first actual brightness value for each brightness period using a corresponding linear function among the multiple linear functions.
1 more element
An operating method of an image sensing system, comprising:
- generating one or more test images;
- calculating an actual slope representing a relationship between exposure times and second actual brightness values and a reference slope representing a relationship between some of the exposure times and some of the second actual brightness values based on second brightness values corresponding to the test images, and generating a compensation function based on a slope difference between the actual slope and the reference slope;
- and
- differently compensating for first brightness values for each output period based on the compensation function.
1 more element
Dependencies are inferred from the claim text.