Pixels to Pictures
Introduction 3 steps 1 pixel Hexadecimal Red-Green-Blue Colors from 0-255 17 million colors More pixels = better Two parts of a file Overview Options Pixel positions Pixel values Brightness Brightness example Contrast Contrast example Color Color example ND grad Sharpen Blur Acquiring an image Scanners Scanner specs Resolution Bit depth & DMAX Other Digital cameras Sensor types Digicam pixels Four into one Interpolation More sensors Print size Output What is resolution? Dots vs. pixels Printer resolution Output resolution
Introduction 3 steps 1 pixel Hexadecimal Red-Green-Blue Colors from 0-255 17 million colors More pixels = better Two parts of a file Overview Options Pixel positions Pixel values Brightness Brightness example Contrast Contrast example Color Color example ND grad Sharpen Blur Acquiring an image Scanners Scanner specs Resolution Bit depth & DMAX Other Digital cameras Sensor types Digicam pixels Four into one Interpolation More sensors Print size Output What is resolution? Dots vs. pixels Printer resolution Output resolution
Print size 2
Enlarging Formats Conclusion Links Software
Choosing Your Print Size
Resolution vs. size
Changing the output resolution (with resampling turned OFF) is how you control the size of your print: As the output resolution gets smaller, the print size gets bigger.
| For a hypothetical 900 by 900 pixel image (less than 1 megapixel): | |
| Output Resolution | Print Size |
| 900 ppi | 1 inch by one inch |
| 300 ppi | 3 inches by 3 inches |
| 250 ppi | 3.6 inches by 3.6 inches |
| 100 ppi | 9 inches by 9 inches |
| 200-240 ppi is the minimum for photographic printing. | |
