Homework #2

1. What are web acceptable images?

Web acceptable images are formatted correctly, sized correctly, named correctly, and saved correctly to be easily viewable by the lowest common viewer’s capabilities.

2. What do the acronyms mean?

GIF= Graphics Interchange Format

PNG= Portable Image Format

JPG (JPEG)= Joint Photographics Experts Group

3. How do they differ? In size? In DPI?

GIF= A gif measures at about 8 bits per pixel with 256 colors used. GIF’s are not great for photographs, but work well as graphics, logos, or solid areas of color.

PNG= PNG’s have lossless data compression. They measure at about 24 bits per pixel in RGB. PNG’s are designed to transfer images on the internet.

JPG= JPG’s image quality and compression can be adjusted. This is the most common format for transferring images to the web, however, PNG’s are slowly proving to be a better format for the web.

4. Is one better than the other for a certain function?

GIF’s are better suited for graphics, logos, animation, and solid areas of color. PNG’s are designed to transfer images on the internet, but maintain lossless data compression (uphold quality bit-by-bit). JPG’s are also used to transfer images to the web. BMP or Bitmap (device independent bitmap) stores bitmap digital images.

JPG (jpeg) - png - gif - bmp