Image Resolution


Ya say you want a resolution? Well, all right!
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A Work in Progress!

Note:
This page was created for use in my former teaching. It is only occasionally updated resulting in many links being more of historical rather than current usefulness. Over time many links will suffer link rot.

 

  1. Understanding Resolution
  2. Understanding Digital Camera Resolution
  3. Counting Megapixels — All Megapixels Are Not Created Equal —
  4. Pixels
  5. Image resolution examples
  6. Image resolution examples
  7. Printing for Less.com   Photoshop   Image Resolution    Finding Happiness at 300 dots-per-inch
  8. Resolution Inch by Inch - Deciphering SPI and PPI and DPI and LPI
  9. Computer Graphics
  10. Photoshop Tutorials    Mike's Sketch Pad
  11. Different levels of slide SCANNING resolutions and file FORMATS.
  12. Image Workshop
  13. Manuscript Digitization Demonstration Project
  14. Fromex: Resolution Explained
    1. to produce a “photo quality” print, we must print at 300 ppi (pixels per inch);
    2. Commonly the size of a digital camera image is proportionate to a 4x5.3 not a 4x6.

Digital Photography: Today and Tomorrow

With 10 megapixel CCDs (digital imaging elements) on the horizon, it is easy to predict the downfall of film. CCDs are more light sensitive than film, so a camera with 10 megapixel resolution would be more flexible than a film solution of similar quality (this would correspond to approximately 800 speed film). However it is important to note that most Pro photographers use film of speeds 25 or 50, and to equal the quality possible with such film, digital cameras may potentially need 50 megapixels, or more.

How many pixels are there in a frame of 35mm film?
20 million "quality" pixels in a top-quality 35mm shot.
Digital or 35MM?
Photos I would not have gotten with a digital camera

Digital Photography: The Myth of Resolution

Lesson 2: Understanding Resolution

An Introduction to Digital Photography

RESOLUTION:

Dan Heller's Tutorial Series: Digital Photography

FocalFix.com : Articles : Digital Photography Skills

The British Columbia Digital Library: Construction Tools: How-To Manuals   Standards

TASI :: Technical Advisory Service for Images

 

Typical Resolution values for common output devices:

Monitor 72 - 96 LPI
Inkjet 75 - 125 LPI
Newsprint 80 - 100 LPI
Books 120 - 140 LPI
Magazines 150 - 175 LPI
Art Magazines & books 200 - 250 LPI
Digital Camera 240

 


Resolutions of PhotoCD Images
The Kodak Photo CD
Photo CD Application Background
Resolution
Image size
in pixels
Pixels Name
192 by 128 24,576 Base/16
384 by 256 98,304 Base/4
768 by 512 393,216 Base
1536 by 1024 1,572,864 4Base
3072 by 2048 6,291,456 16Base
6144 by 4096 25,165,824 64Base

 

Printing Kodak Photo CD images
A few scanning tips

Image size
in pixels
Kodak's name for the size Image size
in bytes
6144x4096 Base*64 (Optional Master) 75 megabytes
2048 x 3072Base*1618,874,368
1024 x 1536Base*4 (same resolution as HDTV) 4,718,592
512 x 768Base (same resolution as TV) 1,179,648
256 x 384Base/4 (Thumbnail) 294,912
128 x 192Base/16 (Small Thumbnail) 73,728

Kodak Photo CD Basics

Master Photo CD Five-Resolution Image Pac format:

Base/16     129 x 192      73.7Kb     Low res monitor preview


Base/4      256 x 384      249.9Kb    Index print thumbnails


Base        512 x 768      1.1Mb      Television or monitor display


Basex4      1024 x 1536    4.7Mb      Prepress scan for 3"x5" max @ 150 lpi

Basex16     2048 x 3072    18Mb       Film output; prepress for up to 8"x10"

Pro Photo CD 6-Resolution Image Pac format:

FROM 35MM:

Base/16     129 x 192      73.7Kb     Low res monitor preview

Base/4      256 x 384      249.9Kb    Index print thumbnails

Base        512 x 768      1.1Mb      Television or monitor display

Basex4      1024 x 1536    4.7Mb      Prepress scan for 3"x5" max @ 150lpi 

Basex16     2048 x 3072    18Mb       Film output; prepress for up to 8"x10" 

Basex64     4096 x 6144    72Mb       Prepress for over 8"x10"
FROM OTHER SIZES:

FILM SIZE                               6-RES IMAGE PAC FILE SIZE                               5-RES IMAGE PAC FILE SIZE

 35mm full frame         4096 x 6144 pixels-72MB               2048 x 3072 pixels-18MB

 4.5cm x 6cm             4096 x 3072 pixels-36MB               2048 x 1536 pixels- 9MB

 6cm x 6cm               4096 x 4096 pixels-45MB               2048 x 2048 pixels-11MB

 6cm x 7cm               4096 x 4780 pixels-55MB               2048 x 3490 pixels-14MB

 6cm x 9cm               4096 x 6144 pixels-72MB               2048 x 3072 pixels-18MB

 4" x 5"                 4096 x 5200 pixels-59MB               2048 x 2600 pixels-15MB

 


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David J. Hark
HARK/INTERNET-HELP, inc.
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Last updated: 9 January 2006

 

© 2004, 2005, 2006 David J. Hark