Now that you understand binary and the way computers translate bits into bytes and numbers, you can easily understand the way the brightness of a pixel is broken down into several steps, from completely dark to completely bright, or perhaps from no red to fully red. Bit depth applies to the acquisition of sound just as it applies to capturing light. This lesson explains the grain size of visual and audio sampling.
- [Instructor] Let's start out with how bright a pixel is.…Remember, while we're talking generally about images…or even a stream of images making video,…your camera, computer, and screen…are all really thinking about individual pixels…in a particular location in the image.…So when we talk about things like bit depth,…color mode, and so on,…we're really talking about the rules…that apply to each individual pixel.…Bit depth simply means how many bits,…that's our ones and zeros,…are used to record how bright a pixel is,…or how red, how blue, or green.…
And we'll get to color in the next lesson.…For now, let's start out with the brightness.…Each pixel has a number that defines how bright it is.…We should start with what we mean…by fully bright and fully dark.…And there's a big debate about this that's ongoing,…and it may never be resolved.…But for now, let's just say…there's an amount of brightness…that's as bright as the pixel can be,…and we'll call that fully on.…Or as they would say in regular color theory,…we'll call that one.…
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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