Image Size
Problem
Question
If you are to create digital content what should be the resolution that should be used in photoshop for example?
Answer
2560x1600
Details
Concepts
- Density-independent pixel (dp) - The conversion of dp units to screen pixels is simple: px = dp * (dpi / 160). For example, on a 240 dpi screen, 1 dp equals 1.5 physical pixels.
- Others to investigate
- resolution (width, height)
- diagonal
- dpi
- colours
- transparency
- reflection (mirror - maximum, black - minimum?, metallic colours: gold, silver ….)
Ratio
| Width | Height | R=W/H | desc |
| 17 | 9 | 1.888 | - |
| 16 | 9 | 1.775 | = |
| 5 | 3 | 1.666 | = 15/9 |
| 8 | 5 | 1.6 | = 16/10 |
| 3 | 2 | 1.5 | = 15/10 |
| 4 | 3 | 1.3 | = 12/9 |
| 5 | 4 | 1.25 | = 10/8 |
Image sizes
| Device | Width | Height | R=W/H | Screen | Density (PPI) | DPI (dots per inch) |
| generic 4:3 | 4 | 3 | 1.3 | - | - | |
| generic 16:9 | 16 | 9 | 1.775 | - | - | |
| Amazon Kindle Fire HDX 8.9” | 2560 | 1600 | 1.6 | 8.9 | 339 | |
| Google/Samsung Nexus 10 | 2560 | 1600 | 1.6 | 10.1 | 299 | |
| Apple iPad Mini 2013 | 2048 | 1536 | 1.3 | - | 326 | |
| Apple iPad Air | 2048 | 1536 | 1.3 | - | 326 | |
| iphone 5 | 1136 | 640 | 1.775 | 4 | - |
