A pixel is a dot—but does that dot have to be square? It turns out that the answer is no. In fact, we have been using non-square pixels for many years, particularly in the display of standard definition television. In simple terms, a non-square pixel is a pixel that isn't square. It really is that simple. This video explains the way non-square pixels are used, and should help to remove any doubt you might have when someone asks you "Is this non-square?"
- [Instructor] When working in graphic design applications,…most commonly, your pixels will be square,…and this makes good sense.…Intuitively, a dot is a dot, and it's square.…100 pixels wide times 100 pixels tall makes a square.…When working with video, it's also possible…you'll be working with pixels that are not square.…The shape of a pixel is often expressed as a ratio,…just like images.…So, one to one is square.…You can create a number of different image shapes…with the same number of pixels,…simply by changing the shape of the pixels.…
As long as the camera records this way…and you display the image with the same pixel shapes,…everything will look correct.…Squares will still be square…and circles will still be circles.…For example, if you were shooting 16 by 9 NTSC…standard definition video, you'd be working…with widescreen pixels, which are 1.21 to 1 wide.…As you might guess, this means your image has less effective…horizontal image resolution than it would have…if your pixels were all square.…You're not using as many pixels to make up the image.…
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 37s 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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