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Grey Level and Noise Evaluation of a Foveon X3 Image Sensor: A Statistical and Experimental Approach

机译:Foveon X3图像传感器的灰度和噪声评估:一种统计和实验方法

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摘要

Radiometric values on digital imagery are affected by several sources of uncertainty. A practical, comprehensive and flexible procedure to analyze the radiometric values and the uncertainty effects due to the camera sensor system is described in this paper. The procedure is performed on the grey level output signal using image raw units with digital numbers ranging from 0 to 212-1. The procedure is entirely based on statistical and experimental techniques. Design of Experiments (DoE) for Linear Models (LM) are derived to analyze the radiometric values and estimate the uncertainty. The presented linear model integrates all the individual sensor noise sources in one global component and characterizes the radiometric values and the uncertainty effects according to the influential factors such as the scene reflectance, wavelength range and time. The experiments are carried out under laboratory conditions to minimize the rest of uncertainty sources that might affect the radiometric values. It is confirmed the flexibility of the procedure to model and characterize the radiometric values, as well as to determine the behaviour of two phenomena when dealing with image sensors: the noise of a single image and the stability (trend and noise) of a sequence of images.
机译:数字图像上的辐射值受不确定性因素的影响。本文介绍了一种实用,全面,灵活的过程,用于分析由于相机传感器系统引起的辐射值和不确定性影响。该过程使用具有0到2 12 -1的数字范围的图像原始单位在灰度级输出信号上执行。该程序完全基于统计和实验技术。得出了线性模型(LM)的实验设计(DoE),以分析辐射值并估计不确定性。提出的线性模型将所有单个传感器噪声源整合到一个全局组件中,并根据诸如场景反射率,波长范围和时间等影响因素来表征辐射值和不确定性影响。实验在实验室条件下进行,以最大程度地减少可能影响辐射值的其余不确定性源。可以确定该过程的灵活性,即可以建模和表征辐射值,并可以确定在处理图像传感器时出现的两种现象的行为:单个图像的噪声和一系列图像的稳定性(趋势和噪声)。图片。

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