Digital Graphics Fundamentals Flashcards
What does ‘royalty free’ mean in the context of images?
Royalty free images need to be purchased before you can download and use them, but you do not need to pay royalties to the creator after the initial purchase.
What does ‘Creative Commons Zero’ mean?
Creative commons zero images are completely free for personal or commercial use without the need for permission or attribution to the creator.
What does ‘Attribution’ mean in the context of image licensing?
Attribution lets people distribute, display, and modify images freely so long as they credit the creator.
What does ‘All Rights Reserved’ mean?
All rights reserved images are owned completely by the copyright holder who have the sole rights to its use, distribution, and modification.
Describe the JPG file format.
JPG is a 16-bit format that uses lossy compression and is suited for complex images like photographs. It can display millions of different colours but does not support transparency.
Describe the GIF file format.
GIF is an 8-bit format that uses lossless compression but can only display up to 256 colours. It supports transparency and is often used for animations.
Describe the PNG file format.
PNG is a lossless format that supports transparency. Tends to produce larger file sizes than lossy formats but works well for non-photographic images with few colours, such as icons, infographics and logos.
Describe the SVG file format.
SVG is a vector format where images are saved as XML data and are often used for logos or illustrations. They can have very small file sizes while allowing their contents to be scaled to any size without losing quality.
What is lossy compression?
Lossy compression reduces file size by sacrificing image quality, which can introduce visual artifacts if the quality is reduced too much.
For example, lossy is used in JPEG file types.
What is lossless compression?
Lossless compression reduces file size without any loss of data or quality. The original data can be perfectly reconstructed from the compressed file.
For example, lossless is used in PNG file types.
