Understanding Digital Images Study Guide
This guide covers the essential concepts of digital image representation, from the fundamental pixel to the differences between raster and vector graphics. Learn about color depth, resolution, and how to calculate file sizes, providing a solid foundation for understanding digital visual media.
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Digital Sound and Image Representation and Compression
Digital Sound Representation and Sampling
Sound waves are converted from analogue signals to digital code using an analogue to digital converter through sampling.
- Sound waves
- Analogue to digital converter
- Sampling
- Samples
- Binary
- Amplitude
- Frequency
- Sampling resolution
- Bit depth
- Sampling rate
- File size calculation
Digital Sound Representation and Sampling
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Introduction to Data Compression Types
Data compression is a reduction in the number of bits needed to represent data through lossless or lossy methods.
- Data compression
- Lossless compression
- Lossy compression
- Storage space
- Transmission time
- Storage costs
- Website loading speed
Lossy vs Lossless Data Compression
Comparing lossy and lossless compression features including original data preservation, quality, and specific image or audio examples.
- Lossy compression
- Lossless compression
- Data preservation
- Image examples
- Audio examples
- PNG
- JPEG
- ALAC
- MP3
- AAC
Choosing Between Lossless and Lossy Compression
The choice between lossless and lossy compression depends on the purpose, acceptable level of quality loss, and desire for file size.
- lossless compression
- lossy compression
- image quality
- audio quality
- file size
- storage space
Fundamentals of Digital Image Representation
A digital image is a representation of a real image as a set of numbers that can be stored and handled by a digital computer.
- Digital image
- RGB
- Pixel
- Resolution
- Pixel Density
- Color Depth
- Bit Depth
- Vector graphics
- Raster graphics
- Bitmap
- Scalability
- File size calculation
Fundamentals of Digital Image Representation
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