This thesis discusses camera exposure time setting in video capture utilizing sensors piecewise linear response mode. It consists of seven chapters. Introductionary chapter presents physical properties used in photometry and gives brief history overview of high dynamic range imaging. Key factors that affect quality of an image and sensor properties are also presented in this chapter.
Second chapter presents hardware, camera, its key parts and lens. Principle of operation of CMOS sensor focusing on piecewise linear respons and basic difference between CCD and CMOS sensors are highlighted.
Third chapter focuses on commonly used algorithms for exposure time setting, on those used for linear response as well as on those that are sensor type independant.
Algorithm for linear response mode is pesented in chapter four.
Analysis, test environment and performance tests of the camera with different criteria functions and measurements of dynamic range are presented in chapter five. In this chapter we describe criteria function that enables condition detection for use of one or two knee points.
Results of factor and PID regulation with chosen criteria functions are presented in chapter six.
In chapter seven summarized findings based on conducted measurmens are presented.
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