4. Pixels per inch
The number of pixels in one inch of paper.
A measurement for digital photos/images.
Higher resolutions results in smaller photos
but better image quality.
Good quality printing requires 300 ppi
(standard).
9. Dots per inch
The number of dots of ink on the page
when the image is printed.
A measurement for printing devices.
A printer may put down several dots to
reproduce one pixel.
Suitable ppi from image + high dpi from
printer = good quality printed image.
10.
11. SAMSUNG CLP-325 HP INKJET 4200n
Source: HP website
Source: Samsung website
12. Other concepts
Resizing and Resampling:
http://www.youtube.com/watch?v=-_1j1f2Qh20
http://www.webdesignerdepot.com/2010/02/the-myth-of-
dpi/
Bitmap (raster) and vector images:
http://graphicssoft.about.com/od/aboutgraphics/a/bitma
pvector.htm
Samples Per Inch (SPI), Lines Per Inch (LPI):
http://desktoppub.about.com/cs/intermediate/a/meas_re
solution.htm
Compressions and file formats:
http://www.library.cornell.edu/preservation/tutorial/intro/int
ro-07.html
13. Resources
Adobe. (n.d.). Image size and resolution. Retrieved February 14, 2013, from Adobe
Help:
http://help.adobe.com/en_US/photoshop/cs/using/WSfd1234e1c4b69f30ea53e4100
1031ab64-7945a.html
Binder, B. (2011, March 8). Adobe InDesign: Why Do my Images Look So Bad?
Retrieved February 14, 2013, from ROCKY MOUNTAIN TRAINING blog:
http://blog.rockymountaintraining.com/?p=1799
Campbell, Long, M., & Dave. (2007). Digital Photography for Teens. In Making Prints
(pp. 251-271). Boston, MA, USA: Course Technology / Cengage Learning.
Dacey, A. (n.d.). DPI and PPI Explained. Retrieved February 14, 2013, from
andrewdaceyphotography:
http://www.andrewdaceyphotography.com/articles/dpi/
Johnson, Tobie, H., & David, C. (2004). Digital Printing Start-Up Guide.
Boston, MA, USA: Course Technology / Cengage Learning .
Spooner, C. (n.d.). A Handy Guide to Image Resolutions in Print Design. Retrieved
February 14, 2013, from SpoonGraphics: http://blog.spoongraphics.co.uk/articles/a-
handy-guide-to-image-resolutions-in-print-design
Virgilli, S. (2012, February 9). Pixels, Dots and Resolution. Retrieved February
14, 2013, from Vox Lab Youtube Channel:
http://www.youtube.com/watch?v=JZVlpCIAUMo