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
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
PART II: Image Acquisition
Options for getting your digital image
Now that we've gone through the ways in which your computer handles digital images, it's time to acquire some to play with. For this, we have basically three options:
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• A scanner Flatbed Scanner - To scan prints*. Film Scanner - For slides or negatives. • A digital camera To create digital files directly. * Note that some flatbed scanners come with attachments for scanning slides and negatives. Although these are good enoug for many applications, the quality of the scans is generally much lower than that of a dedicated film scanner. |
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