week3

This week was about learning how to scan, what file formats are best suited for what, what compression was, what resolution was and re-sampling.


Common File Formats for images: List Four commonly used for image files, and indicate a use for each one.

jpeg	Good for raster images. Makes images small for internet but keeps quality
tiff	Good for images keeps quality
pdf	used for variety of different things. Compacts them keeps quality
gif	Good for internet/vector images loses quality though.

What is compression?
Removes some of the data from your file, to reduce size. i.e when a file format makes your image small, it is applying compression to your file.

Which image file formats compress the file to create a smaller file size?
gif: graphic interchange format; lots of compression, low quality.
tiff: choose to make it a smaller file.

What is resolution?
the quality of the image

What resolution should an image be to PRINT well? 150- 300dpi
What resolution is sufficient for a file that is going on line? 72dpi

What happens when a file is resampled?
The pixel dimensions (width and height) are changed with the resolution.When it is not ticked, the pixel dimensions stay the same while you change the resolution.

Here is the image I scanned etc. Saved under 'randomjunkweek3.jpeg' and 'randomjunkweek3.tiff'