Design And Implementation Of Digital Camera Performance Parameter Measurement System

The digital camera is an optoelectronic imaging system that collects light information reflected or radiated from the surface of the object to image the target,and directly outputs digital signals.It can reflect the details of the target and facilitate computer signal processing.It has been widely used in scientific research,industrial testing,biomedicine and people’s daily life.With the continuous deepening of digital camera applications,many specific occasions have put forward new requirements for the measurement and evaluation of digital camera performance parameters.Therefore,the development of a system for measuring the photoelectric performance and imaging quality parameters of digital cameras has good application prospects.Based on the existing camera performance evaluation research,based on the functional requirements and technical indicators of specific topics.First,the significance and measurement principles of photoelectric response,spectral response,noise,dynamic range,signal-to-noise ratio,and modulation transfer function(MTF)related to photoelectric performance and imaging performance in digital cameras are introduced.The overall scheme of the measurement system is designed.Then theoretical analysis of the light energy transfer process of the measurement system,the establishment of the digital camera light energy-gray value transfer model,and the theoretical simulation and experimental verification of the model,thereby deducing the mathematical expression of the system measured parameters.Based on the measurement principle and theoretical model of the system,the thesis designs a measurement system consisting of integrating sphere,light source,collimator,standard detector,test target and other modules,and introduces the realization process of each module in the system in detail.Finally,the experimental measurement and analysis of the developed system show that the technical indicators of the designed digital camera performance parameter measurement system meet the design requirements,and have a good guiding significance for the manufacture and deep application of digital cameras.