Three Years of Practical Experience in Using ISO Standards for Testing Digital Cameras

摘要

The measured parameters OECF, dynamic range, used digital values and white balance are giving a good idea of the characteristics of a tested camera. By knowing the parameters and having some experience it is possible to transfer the sesults of the cameras to a predicted behavior in real life photography. The SFR evaluation is often giving different results between computed value and visible result. This is in our opinion the most difficult value on testing digital cameras right now. We decided to make a visual evaluation of the pictures but we are always computing the SFR too to get a better understanding of the SFR . The lower S/Nx value which is used to determine the dynamic range of a digital camera should be set to a fixed value. The color reproduction quality gives information about saturation enhancement of the digital cameras. The target has to be changed to ColorChecker DC and the results should be displayed as Luminance, Chroma and Saturation values.