After the series on monitoring (Viewer Monitoring, Monitoring?Monitors and video monitors), today I will launch a new, more technical series that will greatly help filmmakers in the field of photography and film management, with an introduction to digital cinematography. This will be a series of articles on light, color, color temperature, grayscale area theory, latitude and how to use grayscale and color tables.
The first topics I’m going to present on lighting in photography and film are about light and color, so let’s go!
The light
Like radio waves and X-ray waves, visible light is a form of electromagnetic radiation. Although the wavelengths vary from more than a mile (in the case of some radio waves) to a millionth of a millimeter (in the case of X-rays). The human eye is only sensitive to a very narrow range of these electromagnetic waves.
The radiation we see from all of our own, in all its colors, is in this narrow fraction of the electromagnetic spectrum. Visible light has a wavelength ranging from approximately 400 to 700 nanometers. Each light source emits a different proportion of energy at different wavelengths. visible spectrum Color depends not only on the object, but also on the light source and the observer.
White light is made up of red, green, and blue lights. In fact, when a beam of white light passes through a prism, the light is separated into primary and secondary colors.
If we take white sunlight and add refraction through a prism, in this case raindrops, we will divide the white color into colors creating a ‘rainbow’.
The color
Different people perceive colors differently and there are several reasons for it. Color is associated with personal preferences and memories. Now let’s take a closer look at the color of things. Black occurs when an object absorbs all the light that strikes it, without reflecting any light.
Gray occurs when all wavelengths are reflected equally, but at a lower level than white.
Color tone occurs when some light lengths are reflected more than others. Most of the colors we see are not a single wavelength. Colors are usually combinations of various wavelengths in the spectrum. In the following image the red wavelengths are reflected more than the others.
Give the rose the appearance of red
However, if pink is seen under other light sources, its color may look different.
Primary colors are the basic components of color. There are two basic systems for producing color:
? Color additive system
? Color subtractive system
The additive color system that reproduces colors by adding colored lights has three primary colors:
The three primary subtractive colors, what are also the secondary colors of the additive system?Are:
The superposition or addition of a beam of red, green and blue light can produce a “white” light. Note that in areas where two “primary” colors overlap, a “secondary” color appears:
The color wheel offers another way to view the relationship between additive and subtractive primary colors and their secondary colors. Each color on the color wheel shows its complementary color, for example:
That’s right, my friends!
In the next article, we’ll analyze the color temperature.
Let’s look at everyone!