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
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
Scanner Resolution
Physical or linear resolution
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• A scanner passes a Charge-Coupled Device (CCD) by the media being scanned. • The CCD measures small areas (dots) as it passes the media being scanned. • Each scanned dot becomes a digital pixel. • The more dots per inch it reads, the higher the resolution. • The higher the resolution the more detail recorded and the larger the digital image. • Higher resolution digital images show greater detail (up to a point) and/or can be printed in larger sizes. |
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Put your mouse pointer on the photo to increase the resolution. |
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