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公开(公告)号：US09131160B2
公开(公告)日：2015-09-08
申请号：US14073067
申请日：2013-11-06
Applicant: Quanta Computer Inc.
Inventor： Keng-Sheng Lin , Chih-Chi Cheng , Chung-Te Li , Hsin-Yu Chen , Wen-Chu Yang
CPC classification number: H04N5/2353 , H04N5/2355 , H04N5/2356 , H04N5/355 , H04N5/35536
Abstract: A method for controlling an exposure duration of a high dynamic range image, including: consecutively generating a first high dynamic range image having a first exposure duration ratio and a second high dynamic range image having a second exposure duration ratio greater than the first exposure duration ratio; performing image quality evaluations on both the first high dynamic range image and the second high dynamic range image to obtain a first image quality and a second image quality, respectively; and determining whether the second image quality is better than the first image quality; if yes, generating a third high dynamic range image having a third exposure duration ratio greater than the second exposure duration ratio; if not, generating the third high dynamic range image having the first exposure duration ratio and setting the first exposure duration ration as the optimal exposure duration ratio.
Abstract translation: 一种用于控制高动态范围图像的曝光持续时间的方法，包括：连续生成具有第一曝光持续时间比的第一高动态范围图像和具有大于第一曝光持续时间比的第二曝光持续时间比的第二高动态范围图像 ; 在第一高动态范围图像和第二高动态范围图像两者上分别执行图像质量评估以分别获得第一图像质量和第二图像质量; 以及确定所述第二图像质量是否优于所述第一图像质量; 如果是，则生成具有大于第二曝光持续时间比的第三曝光持续时间比的第三高动态范围图像; 如果不是，则生成具有第一曝光持续时间比率的第三高动态范围图像，并将第一曝光持续时间定值设定为最佳曝光持续时间比。
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公开(公告)号：US09554059B1
公开(公告)日：2017-01-24
申请号：US14873711
申请日：2015-10-02
Applicant: Quanta Computer Inc.
Inventor： Chin-An Lin , Chung-Te Li , Keng-Sheng Lin , Hao-Jen Wang , Hsin-Yu Chen
CPC classification number: H04N5/2355 , H04N5/2351 , H04N5/2356 , H04N5/35554 , H04N5/35581
Abstract: An exposure-control system and an associated exposure control method are provided. The exposure-control system includes: an image capturing unit configured to capture a long-exposure image and a short-exposure image with a first exposure value and a second exposure value, respectively; and a processor, configured to calculate histograms of the long-exposure image and the short-exposure image, and calculate an exposure ratio according to the calculated histograms, the first and second exposure values, wherein when the exposure ratio is smaller than a first threshold, the processor switches a current exposure mode to a low dynamic range mode. When the exposure ratio is larger than a second threshold, the processor switches the current exposure mode to a high dynamic range mode. When the exposure ratio is between the first threshold and the second threshold, the processor does not switch the current exposure mode.
Abstract translation: 提供曝光控制系统和相关的曝光控制方法。 曝光控制系统包括：图像拍摄单元，被配置为分别捕获具有第一曝光值和第二曝光值的长曝光图像和短曝光图像; 以及处理器，被配置为计算长曝光图像和短曝光图像的直方图，并且根据所计算的直方图，第一和第二曝光值计算曝光比，其中当曝光比小于第一阈值时 处理器将当前曝光模式切换到低动态范围模式。 当曝光比大于第二阈值时，处理器将当前曝光模式切换到高动态范围模式。 当曝光比在第一阈值和第二阈值之间时，处理器不切换当前曝光模式。
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公开(公告)号：US20150042836A1
公开(公告)日：2015-02-12
申请号：US14073067
申请日：2013-11-06
Applicant: Quanta Computer Inc.
Inventor： Keng-Sheng Lin , Chih-Chi Cheng , Chung-Te Li , Hsin-Yu Chen , Wen-Chu Yang
CPC classification number: H04N5/2353 , H04N5/2355 , H04N5/2356 , H04N5/355 , H04N5/35536
Abstract: A method for controlling an exposure duration of a high dynamic range image, including: consecutively generating a first high dynamic range image having a first exposure duration ratio and a second high dynamic range image having a second exposure duration ratio greater than the first exposure duration ratio; performing image quality evaluations on both the first high dynamic range image and the second high dynamic range image to obtain a first image quality and a second image quality, respectively; and determining whether the second image quality is better than the first image quality; if yes, generating a third high dynamic range image having a third exposure duration ratio greater than the second exposure duration ratio; if not, generating the third high dynamic range image having the first exposure duration ratio and setting the first exposure duration ration as the optimal exposure duration ratio.
Abstract translation: 一种用于控制高动态范围图像的曝光持续时间的方法，包括：连续生成具有第一曝光持续时间比的第一高动态范围图像和具有大于第一曝光持续时间比的第二曝光持续时间比的第二高动态范围图像 ; 在第一高动态范围图像和第二高动态范围图像两者上分别执行图像质量评估以分别获得第一图像质量和第二图像质量; 以及确定所述第二图像质量是否优于所述第一图像质量; 如果是，则生成具有大于第二曝光持续时间比的第三曝光持续时间比的第三高动态范围图像; 如果不是，则生成具有第一曝光持续时间比率的第三高动态范围图像，并将第一曝光持续时间定值设定为最佳曝光持续时间比。
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