Page 44 - TCS ICT Book 8

The City School 2021-2022

Let’s Review

1. A raster graphics or bitmap image is a dot matrix data structure that
represents a generally rectangular grid of pixels (points of colour), viewable via

a monitor, paper, or other display media.
2. PPI & DPI (Pixel per inch and Dots per inch respectively) are the standard units

for measuring image size.
3. Recommended resolution for printed images is 150-300 dpi, for Web images it

is 72 dpi.
4. Resolution is the number of pixels on a printed area of an image.

5. In the swatches palette, you can choose a foreground or background colour
and add a customized colour to the library.

6. The free transform command lets you apply transformations (rotate, scale,
skew, distort, and perspective)

7. The Hue/Saturation command adjusts the Hue (colour), Saturation (purity)
and lightness of the entire image,

8. The gradient tool creates a gradual transition between multiple colours.
9. The healing brush tool lets you correct imperfections, causing them to

disappear into the surrounding image.

My Notes
My Notes!

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