Two Types of 2D GraphicsIt's almost impossible to discuss graphics software without first establishing an understanding of the differences between the two major 2D graphic types:
bitmap and vector images. This is an important lesson and often a tough one to grasp. If you work with graphics at all, it's bound to come up, so it's an important concept to understand.
Key Points About Bitmap Images:
• pixels in a grid
• resolution dependent
• resizing reduces quality
• easily converted
• restricted to rectangle
• minimal support for transparency
Common bitmap formats include:
• BMP
• GIF
• JPEG, JPG
• PNG
• PICT (Macintosh)
• PCX
• TIFF
• PSD (Adobe Photoshop)
Popular bitmap editing programs are:
• Microsoft Paint
• Adobe Photoshop
• Corel Photo-Paint
• Jasc Paint Shop Pro
• Ulead PhotoImpact
All scanned images are bitmaps, and all images from digital cameras are bitmaps.
Converting between bitmap formats is generally as simple as opening the image to be converted and using your software's Save As... command to save it in any other bitmap format supported by your software.
Key Points About Vector Images:
• scalable
• resolution independent
• no background
• cartoon-like
• inappropriate for photo-realistic images
• metafiles contain both raster and vector data
Common vector formats include:
• AI (Adobe Illustrator)
• CDR (CorelDRAW)
• CMX (Corel Exchange)
• CGM Computer Graphics Metafile
• DXF AutoCAD
• WMF Windows Metafile
Popular vector drawing programs are:
• Adobe Illustrator
• CorelDRAW
• Macromedia Freehand
• Xara X
Due to the nature of vector images, they are best converted to GIF or PNG format for use on the Web.
What About Metafiles?Metafiles are graphics that contain both raster and vector data. For example, a vector image that contains an object which has a bitmap pattern applied as a fill, would be a metafile. The object is still a vector, but the fill attribute consists of bitmap data.
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About: Graphics Software