06-vector Image And Its Tools

Vector Image and Its Tools -Multimedia Design Technologies6th Lecture

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Contents 1. 2. 3. 4.

What is vector Image? Characteristics of vector images Advantage and disadvantage Vector based Drawing software and Its format 5. Practical Work

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Type of digital images z Raster/Bitmap Image • pixels in a grid • resolution dependent • resizing reduces quality • easily converted • restricted to rectangle • minimal support for transparency Original Object

A Bitmap Image

z Vector Image { Vector images describe the image in the term of coordinates and mathematical transformations.

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Vector Image Characteristics of vector images: z scalable z resolution independent z no background z cartoon-like z inappropriate for photo-realistic images z metafiles contain both raster and vector data

Vector Image (cont…) z An object in vector image is defined by mathematical equations rather than pixels, so they always render at the highest quality. z Objects may consist of lines, curves, and shapes with editable attributes such as color, fill, and outline. z Changing the attributes of a vector object does not effect the object itself. We can freely change any number of object attributes without destroying the basic object. z An object can be modified not only by changing its attributes, but also by shaping and transforming it using nodes and control handles.

Vector Image (cont…) z Advantages of Vector based images: z Vector-based Images are scalable and resolution independent image. z (We can increase and decrease the size of vector images to any degree and the objects will remain crisp and sharp, both on screen and in print. ) z Vector-based Images are no background z (Vector objects can be placed over other objects, and the object below will show through.)

Vector Image (cont…) z Disadvantages of Vector based images: z unsuitable for producing photo-realistic imagery. z (Vector images are usually made up of solid areas of color or gradients, but they cannot depict the continuous subtle tones of a photograph. ) z Cartoon-like z applying bitmapped textures to objects giving them a photo-realistic appearance

Software and File Formats z Vector based Drawing Software: { Adobe Illustrator { CorelDRAW { Xara Xtreme { Serif DrawPlus

z Vector based Formats: { AI (Adobe Illustrator) { CDR (CorelDRAW) { CMX (Corel Exchange) { CGM -Computer Graphics Metafile { DXF (AutoCAD) { WMF-Windows Metafile

Practical work (Working with Adobe Illustrator) z z z z z z

A Quick tour of Adobe Illustrator Using Illustrator tools Selection and Shapes Transforming objects Drawing with the pen tool Color and Painting