What is image optimization?

Preparation of image & photo files for web or print

Optimizing images for the web results in files that are small in size, acceptable quality and quick loading. Optimizing images for print results in high resolution images that have depth in detail and no jagged edges.

Image file management is the organization of files with the correct settings and format for the intended use in either print, web or presentation. For example, a logo file may need a variety of sizes, color mode, and format for use in print or web. Photographic images require a variety of settings for sizes, color mode, format, and resolution suitable for web or print.

An understanding of the advantages and limitations of each format and how they can work together, is important for quick web load times, eliminating image degradation in print, and avoiding unnecessary large file size in presentations.

Vector vs pixel images

What is a vector image? Vector graphics use geometrical points, lines, curves, and shapes based on mathematical equations to represent images in computer graphics. Vector images can be enlarged to any size with no lose in image quality.

What is a pixel based image? Pixel-based images are photographic files converted to grids of small rectangular cells (pixels). The smaller and closer together the cells, the better the quality of the image. When a pixel image is enlarged, it can appear grainy (pixellated) because the eye can distinguish individual cells. A pixel based image will lose image sharpness when enlarged.

FAQ

What resolution should I make my images for inserting into a PowerPoint presentation?

Short answer: max pixels 1024 wide x 768 high, 72 resolution

Key Terms: Image Optimization, Resolution, jpg, gif, png, eps, ai, psd, Vector Files, Pixel Images, File Format, CMYK, RGB, Gray Scale, Illustrator, Photoshop, Transparency Settings