1. IMAGE
RESOLUTION
Vuong Ngoc Anh
BIT1SN
Desktop Publishing

2. Pixel

3. Pixel

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).

5. Pixel Dimensions and Document Size

6. 200 pixels/inch 72 pixels/inch

7. Source: bestprintonline; mgxcopy

8. Printing control
72 pixels/inch 200 pixels/inch

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.

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