Before any real photographic examples of histogram use, I must add few more facts regarding images and histograms as they are used today in the digital cameras or post processing software. Colored Images and Their Representation Most of the photos … Continue reading
The CIE XYZ color space [1] defines all colors in terms of three imaginary primaries X, Y, and Z based on the human visual system that possess the following properties: Based on experimental data of human color matching; X, Y, … Continue reading
Color perception is a brain process that starts in the eye’s cone receptors. These receptors are found in three varieties that exhibit sensitivity to approximately red, green, and blue colors. The separation between colors is not clean and there is … Continue reading
The human eye is an incredibly complex detector of electromagnetic radiation with wavelengths between 380 to 770 nm. The sensitivity of the eye to light varies with wavelength (see the CIE photometric curve for the day vision – V(λ) – … Continue reading
There are many books and papers dedicated to the study of light from different perspectives: the artist, the scientist, the designer, the historian or the biologist. There is no point in repeating here what the literature provides in abundance. The … Continue reading