Improving the Luminance Measurement from Digital Images

The paper is based on a critical approach for luminance measurement, based on Exposure Value. Even though the field of imaging measurements has made a lot of progress, recent works shows that there are still things that are not well understood, some even wrong, such as the significance of Exposure Value for extracting luminance values. There are things in the literature that are confirmed, but the existence of any misinterpretation can be an obstacle to the extension of this means of luminance measurement. The extension of the luminance measurement is important for the lighting engineering, for energy saving and light pollution reduction, but also to understand in a better manner the visual environment.