Our perception is so subjective, relative, associative, and filtered by precognitive processes that it's hard to say if one person's perception of color and light matches another's. Still, we know our recording systems, storage, and playback technologies all have limits. Understanding those limits and translating them into meaningful scales allows us to move easily from one system to another—from camera to codec, and from file interpretation to display.
- [Instructor] When working with digital video,…there's a relationship between the brightest…part of the subject and the darkest part.…A lot of complex technical discussion…goes into the way these two extremes are measured.…But the principle is a very simple one.…There's a darkest part of the picture and a brightest part.…As a film viewer, you can be forgiven for thinking…the brightest part would be something like…a white shirt or a white wall.…But actually, that's usually said to be…well below the maximum brightness captured by the camera.…That level is saved for specular highlights.…
That's gleaming car windscreens…or chrome catching the sunlight.…Reflections in glass of all kinds,…any kind of subject that focuses light…in such a way, as to make it significantly…brighter than the rest of the image.…Usually, it's considered acceptable…for these parts of the picture to burn out.…That means to have no detail in them,…because they're brighter than the camera…can register with its particular setup.…In any case, however we measure it…
Get ready to remove the mystery behind terms you've encountered. If you work in a creative profession, this can enhance your command of the tools you use. Learn what a pixel really is, what color channels are, and what audio frequency is. Discover how color channels, bit depth, and video frame rates work. Find out the difference between codecs and file formats, and how compression is involved. By the end of this course, you'll know how to answer common client questions—like, whether a logo should be supplied in vector or bitmap form, and more.
Note: Motion graphics in this course were provided by Chelsea Parrish: chelseaparrish.com.
- What is a pixel?
- Aspect ratios
- Bit depth
- Alpha and transparency
- Light and color channels
- Color modes: RGB, YUV, CMYK
- Camera depth of field
- Chroma Key and Luma Key
- Blend modes
- Color wheels, vectorscopes, and waveforms
- Video compression and codecs
- Frame rates and timecode
- File formats
- Audio amplitude
- Capturing audio tone as frequency
- Audio timing using the phase
Skill Level Beginner
Learning Video Production and Editingwith Rob Garrott19m 25s Beginner
Video Foundations: Cameras and Shootingwith Anthony Q. Artis2h 58m Appropriate for all
Introduction to Video Dialogue Editingwith Ashley Kennedy3h 14m Appropriate for all
1. How Do Computers Think?
2. How Cameras and Computers Think about Color
3. The Language of Color
4. The Shape of Your Picture and the Speed of Your Video
5. Storing Everything (Codecs)
6. Color Wheels, Vectorscopes, and Waveforms
Understanding waveforms2m 39s
7. Making Changes
8. Audio Made Simple
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