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
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
Bit Depth & DMAX
"Bits-per-pixel" resolution
• Bit depth is the resolution of varying shades of color and light and dark within each pixel.
|
||||||||||||||||
| Some manufacturers simply quote the DMAX as the maximum theoretical number shown above, but scanners almost never achieve that in the real world because the analog electronics aren't up to it. It makes little difference if your digital processing can handle a DMAX of 4 when it only receives signals with a DMAX of 3 from the analog part of the scanner! | ||||||||||||||||
|
• DMAX is an indicator of how much detail can be captured in dark areas. |
|
|||||||||||||||
