Assignment 3 – Graphic File Formats

Jack Kellyjkelly85@vt.edu

5/26/2012

Image File CompressionFile Type Compressed Compression

MethodCompression Results

BMP Optional Lossless Varies from good to none

EPS No N/A N/A

GIF Yes If 256 colors or less lossless; otherwise lossy.

Good

JPG Yes Lossy Greater compression means poorer image quality

PCT Yes Lossless Good

Image File Compression (continued)

File Type Compressed Compression Method

Compression Results

PCX Yes Lossless Modest

PDF Yes Lossless or lossy Minimum – ½ ratioMedium – 1/5 ratioMaximum – 1/10 ratio

PNG Yes Lossless Very good

PSD No N/A N/A

TGA Optional Lossless Varies from good to none

TIF Optional Lossless or lossy Very good

WMF No N/A N/A

PowerPoint 2011 ReadableFile Type Insert Picture From File

BMP Yes

EPS Yes

GIF Yes

JPG Yes

PCT Yes

PCX No

PDF Yes

PNG Yes

PSD Yes

TGA Yes

TIF Yes

WMF No

Not All Browsers Are The SameFile Type Displays in Safari 5.1 Displays in Firefox 11

BMP No Yes

EPS No Prompts to view in Preview

GIF Yes Yes

JPG Yes Yes

PCT No Yes

PCX No Prompts to save file

PDF Yes Prompts to view in Preview

PNG Yes Yes

PSD No Prompts to save file

TGA No Prompts to view in Preview

TIF Yes Yes

WMF No Prompts to save file

Recommended Image File Types

• PNG– Offers very good compression– Vector graphics => good for line art

• JPG– Good for photographs– Control over compression options to optimize file size

• GIF– Excellent for simple line art graphics with little color– Good compression

• These formats are viewable in current browsers.