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Class 12 Notes are in progress and are subject to change

Class 12 Outline

Discourse

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Copy 12digital from class to groups

Graphical Formats Chart

What you absolutely, positively need to know about image file formats
 - and also know why you need to know it.

Use EPS and TIFF for print publishing.

Use GIF, PNG, and JPG for online publishing.

TIFFs (and EPS)

 JPEGs GIFs
  • TIFF (Tagged Image File Format) is the most widely supported graphics file format for printing.
  • Even though it is not suitable for teh Web it has other strengths: it is a highly flexible format which is supported by numerous image processing applications.
  • Pictures for publication should be submitted in high-resolution TIFF format.
  • They are generally LARGE files.
  • Minimum requirement for publication is generally 300 ppi.

 If you want to know more about TIFFs

 

 

  • JPEGs are usually better for reproducing photographs.

  • JPEG format, with its support for 16.7 million colors, is primarily intended for photographic images, particularly for use on the web since the files are compressed and download quickly.  

  • When you save an image as a JPEG file, not all of the information in the original image is preserved. This is because if it were, the file size would be very large. JPEG removes some of the information to keep the file size small.

  • Even though the files are compressed, they can still support 16.7 million colors.

  • JPEGs cannot be animated. 

  • They are small to medium files, generally 72 ppi.

If you want to know more about JPEG

 

  • GIFs (either "jiff" or "giff") are usually better for reproducing clean-lined simple designs with strong flat colors such as logos or drawings.

  • GIF files support a maximum of 256 colors, which makes them practical for almost all graphics except photographs.

  • The GIF format supports transparency and is compressed.

  • If you are using original artwork that has only a few colors, like logos, bullets or clip art, GIFs works better.

  • They can be animated, made with transparent backgrounds, and interlaced.

  • They are generally SMALL files.

If you want to know more about GIFs

What format is this graphic? How do you know??

Hands-on:

Homework:

Part 1 - Digital Photos, Pixels, Resolution and File Size
Read these online explanations, then answer the questions in the 12digital homework file

Part 2 - SUMMARY: Social, Legal and Ethical Issues on the Internet

Read True Lies bySuzanne Salvo from the publication Communications World. She raises the question about how much a photo can be altered aesthetically and still be within the bounds of reasonable ethical standards. Remember that ethics are a set of rules that we invent that define what we think is good and bad. The dictionary says ethics are "a set of moral principles or values" and that ethical means "conforming to accepted professional standards of conduct". Aesthetics, on the other hand, deal with the nature of beauty, art and taste, and things that are pleasing in appearance Write a thoughtful blog entry in response to "True Lies"stating which of her opinions and guidelines you agree with (if any). Address the example she gives regarding the bunch of tulips and the notion that manipulation can take place without photo editing software of any kind. In the last sentence, sum up your personal belief regarding the ethics of photo manipulation.

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