Another core part of a colorist's toolset is the waveform monitor. This important tool can display both color and brightness in an image in a way that is objective, measurable, and clear. Once you understand the basic principles of this tool, you can quickly read other kinds of waveforms, and use them to check that your content is ready for broadcast.
- [Narrator] Waveform displays can show both…the total composite color level in your media…and the lumen levels, to explain how these work,…I'm going to show you a waveform without the color displayed.…Waveforms show all the pixels in the current frame,…the horizontal axis is taken from the image,…so the dots in this waveform that are…say 100 pixels from the left are the pixels…100 points from the left in the image and so on.…The vertical axis shows the level of luminance…for each pixel, so dots that are higher up…in this view may not be higher up in the image.…
There is no direct relationship…between the vertical axis of a waveform…and the vertical axis of the image.…And just to spell this out, if you had a dark pixel…at the top of the image, it would appear…at the bottom of the waveform.…Waveforms will display using different scales,…but the principle is always the same.…Pixels higher up on the graph are brighter…than the pixels lower down, in this example,…the left edge is showing the NTSC IRE scale,…while the right edge is showing the PAL milivolt scale.…
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 Intermediate
Introduction to Video Dialogue Editingwith Ashley Kennedy3h 14m Intermediate
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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