SCHOOL OF ART
VISUAL ARTS CORE STUDIO 1 – DIGITAL LITERACY
DIGITAL LITERACY WORKBOOK
Rachel Gillies 2009 Otago Polytechnic
OVERVIEW – WEEK 4
Lecture: Digital Image 2: does Size Matter?
Workshop: Scanning and saving.
Self‐Directed: Scan something you have done in another class – e.g. a drawing/painting (must be dry!)/photograph/print and save it for use at a later date. Save it as a high resolution TIFF, and save a copy as a lower resolution jpeg.
Common File Formats for Images: List 4 file formats commonly used for image files, and indicate a use for each of them – (clues: archive, online, photographic…)
Jpg : Used for internet, emails and websites. Allows for small file size and relatively good quality
Tiff: used for high quality photo editing
BMP: A low compression format that’s popular among image editing software
PSD: ADOBE specific format used among all of their software suites.
What is compression?
It is reducing the redundancy of the information stored in an image, allowing a smaller file size for storage. It removes some of the data from the file to reduce the size. You may lose quality however.
Which image file formats compress the file to create a smaller file size?
What is resolution?how many dots that make up an images, fewer dots make for a low resolution image and lesser quality.
What resolution should an image be to PRINT well? 300dpi
What resolution is sufficient for a file that is going online?_72dpi
Scan an image to save as an archive/print quality file, choosing the correct resolution to scan it at. Save a copy. Next, change the file size (hint: by changing the resolution) so that you have a version of the file, suitable for posting online, or e‐mailing easily (e.g. a smaller file size), and save that too. Write down your full file names here, that you saved them under: