Some time ago, Adobe developed an approach to merging foreground and background pixels using clever logic and mathematical rules that produce more interesting results than simply lowering the opacity of the foreground. This lesson neatly sums up blend modes, and demonstrates two simple examples. Once you understand the underlying principle, you'll be ready to experiment and create more nuanced and interesting compositions using this now universal technique.
- [Instructor] When you change the opacity of a pixel…to reveal the pixel behind it,…you're blending the combined color and luminance values…of those two pixels together.…In this default case,…an amount of the background pixel is revealed,…depending on the alpha channel level…for the foreground pixel.…Blend modes as used in Photoshop…and a great many other applications…use mathematics to combine the values…of the foreground pixel with the pixel behind it,…in a number of different ways.…There's a long list of types of blend modes…and they're usually grouped together…to make it easier to manage them.…
Options to do with lightening pixels or darkening pixels…are grouped together for example.…When you choose no special blend mode,…the default option is normal.…Let's look at a couple of simple examples…to illustrate the more advanced modes.…Lighten mode simply means pixels in the foreground…that are lighter than pixels…in the background are displayed.…If the background pixel is lighter that pixel…is displayed instead.…
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 Garrott20m 33s 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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