Y9
4i: Explain how the manipulation of digital images amounts to arithmetic operations on their digital representation
4i: Explain how the manipulation of digital images amounts to arithmetic operations on their digital representation
| Keyword | Definition |
|---|---|
| arithmetic operation | a mathematical calculation (like adding, subtracting, dividing or multiplying) |
| erase | rubbing out part of an image (or setting the opacity of the pixels to 0) |
| grayscale | an image where all pixels are different shades of gray (or the red, green and blue values for individual pixels are all the same) |
| image manipulation | changing the colours of pixels within a digital image |
| opacity | the opposite of transparency (fully opaque means not at all transparent) |
| pixel | an individual picture element which is a single coloured dot in a bitmap image |
