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An introduction to Digital Imaging |
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2011-10-28 13:42:53 |
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Digital imaging is the creation of digital images, typically from a physical scene.
The term is also used to represent processing, compression, storage, printing, and display images.
The most usual method is by digital photography with a digital camera.
Digital imaging are electronic snapshots taken of a scene or scanned from documents.
The digital image is sampled and mapped as a grid of dots or pixels.
Each pixel is assigned a tonal value black, white, shades of gray or color, which is represented in binary code zeros and ones.
The binary digits (bits) for each pixel are stored in a sequence by a computer and often reduced to a mathematical representation (called image compression).
The bits are then interpreted and read by the computer to produce an analog version for display or printing. As digital technology became cheaper nowadays (around a decade) it replaced the old film methods for many purposes.
For a complete seminar report on Digital imaging, you may consider the following points:
- Digital images
- Digital photography
- Resolution
- Pixel dimensions
- Bit depth
- Dynamic range
- File size
- Compression
- File formats: JPEG, GIF, PNG etc
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External References |
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http://en.wikipedia.org/wiki/Digital_image_processing
http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=83
http://www.stanford.edu/class/ee368/
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