Hardware/software solution for high precision defect correction in digital image sensors
Hardware/software solution for high precision defect correction in digital image sensors
复制标题
用于数字图像传感器高精度缺陷校正的硬件/软件解决方案
DOI：
10.1109/isce.2008.4559487
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
I. Guarneri
中科院分区：
文献类型：
--
作者：
A. Bosco;A. Bruna;F. Naccari;I. Guarneri
高分辨率图像传感器现在是诸如具有相机功能的移动的电话之类的成像设备中的标准。在非常小的传感器中，分辨率的提高是通过减小像素尺寸来获得的，但是在CMOS传感器中，缺陷像素的可能性也增加了。因此，复杂的处理是必要的，以实现高质量的图像，尽管噪声和缺陷。本文提出了一种硬件/软件解决方案，用于图像传感器中缺陷像素的高精度校正。该方法可始终保持缺陷像素的最新映射，并在传感器使用寿命期间发现新的缺陷。通过跟踪像素缺陷的历史，保证了地图的可靠性。地图自动更新，真实的时间没有用户干预。
High resolution image sensors are now standard in imaging devices such as mobile phones with camera functionality. Resolution improvement in very small sensors is obtained by decreasing the pixel size but, in CMOS sensors, the likelihood of defective pixels also augments. Hence, sophisticated processing is necessary for achieving high quality images despite of noise and defects. This paper presents a hardware/software solution for high precision correction of defective pixels in an image sensor. The method maintains an always up-to-date map of the defective pixels and also allows detection of new defects as they show up during the lifetime of the sensor. The reliability of the map is assured by tracking the history of pixels defectiveness. The map is updated automatically and in real time without user intervention.