Opening and Saving Images
How to open and save image
~To open: File => Open
~To save: File => Save
File Formats
~preserve layers
| File format | Uses |
|---|---|
| PSD (Photoshop Document) | Used for Photoshop document |
| PDF (Portable Document Format) | Used for portable document |
| PSB(Large document format) | Used for large document |
| TIFF(Tagged image file format) | Used for Printing |
~does not preserve layers
| File Format | Uses |
|---|---|
| GIF , JPG | Web Graphics |
| RAW | For Digital cameras |
Pixel
Physical point in a raster image, or the smallest addressable element in an all points addressable display device.
* 1 bit = 2 colours
* 4 bits = 16 colours
* 8 bits = 256 colours
* 16 bits = 65,536 colours
* 24 bits = over 16 million colours
Relationship between resolution, on screen size and print size
on screen size / resolution = printed width
resolution = 300 pixels per inch for printing
= 72 pixels per inch for display
