Discussion Response

Discussion Response 150 word each question

1. One of the things I have never enjoyed about AMU undergraduate work is the use of electronic textbooks. I never have the material available when I need it. Nevertheless, there are different file types one can use in a document, determined by specific needs of clarity. For one, there JPGs, short for Joint Photographic Experts Group. There are GIFs, short for Graphics Interchange Format, and also PNGs, short for Portable Network Graphics.

Of the three, JPGs work best when one needs to add photographs and complex images (Coffin, 2010). JPGs reduce file size by removing colors the human eye cannot already discern. JPGs should be used where one needs to insert photographs, or where colors are important to the reader to understand.

GIFs like JPGs, reduce the number of colors in an image. The key difference is that GIFs reduce images to 256 (Coffin, 2010). GIFs are great for images where the loss of color is not that important. Also GIFs possess the ability to be animated. We have all seen them in the use of emails under one’s signature block.

And then there are the PNGs, which some instructors here at AMU require students to upload. PNGs can compress at rates 5 to 25 percent more than GIFs, which allow for smaller file sizes, but at an obvious cost to image clarity.

It would be important for one to decide on image quality when selecting the correct image format.

2. As we are all familiar with, there are several different graphical file types that we see if we’ve spent any amount of time working on computers. The most common of these are the JPG, GIF (there is an ongoing internet battle about the correct pronunciation of that), BMP, and PNG. What many of us probably didn’t know, is that there are some major differences between them. One of which is how well they scale. For example a BMP image looks great when it’s fairly small. But if you were to dramatically increase the size of the picture, you’d notice that it becomes distorted, and loses it’s quality. This is what is meant by scaling. However, there are some file types that actually keep their scaling, and don’t lose any quality, no matter what size they are. These files are called Vector files. While typical image files like JPG or BMP are comprised of pixels (that is tiny single points of color) Vector files are not. Vector files use paths (lines or shapes) instead. This allows them to scale to any size, without losing quality. The file extensions for Vector files are: .ai, .eps, .svg, and .dwr. Although these are not typically used in your everyday computer use. You’ll more likely see them in photo editing applications such as Adobe or Gimp (a free open source alternative to Adobe).

 

 

 

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