task one notes

Task one.

Raster:

-          Made up of parallel lines of a pattern to form an image or a display or television.

-          Electronics: horizontal scanning lines traced by an electron beam.

-           JPEG, GIF, PNG, BMP, TIFF, PSD*

-          Coloured pixels

In use:

-          Nearly all the images on websites are raster images. They are typically digital

Basic file types:

-          .jpg (JPEG raster format), .gif (GIF transparent file), .png (Portable Network Graphic Transparent file), .tiff or .tif (Tag Interleave Format).

-          Adobe Photoshop: .psd 

Vector: 

-          uses points, lines, curves, and shapes or polygons 

-          more flexibility

-          objects

-          individual objects

-          don’t lose quality when resized

-          .svg

-          Common formats: .cgm, .svg, .odg, .eps, .xml

-           

Basic file types:

• Adobe Illustrator: .ai, .ait, .art
• Corel Draw: .cdr, .cdrw, .cdt
• Corel: pat (Paint Shop Pro Pattern Image)
• Digital Line Graph: .dlg, .do
• OpenOffice: .odg

-          drw (vector file), .pif (vector image GDF format), .pct (Macintosh bitmap graphics format) , .ps (Adobe PostScript), .eps (Encapsulated PostScript), .svf (Simple Vector Format).

Pros and cons of vectors:

-          Vector images are scalable, so that the same image can be designed once and resized infinitely for any size application – from business card to billboard.

-          Vector images cannot display the natural qualities of photographs.

-          Vector images cannot as of this writing be used in electronic format – they must be converted to a raster first.

-          Vectors display at the highest resolution allowed by the output device, while rasters blur when blown up.  

Vector-based applications:

·         Adobe illustrator is the industry leader in vector drawing applications.

·         CorelDraw is another popular vector drawing application.

·         Adobe Freehand is used for creating vector graphics.

·         Adobe Fireworks - see Bitmap graphics software applications section above.

Other vector drawing applications include:

·    Adobe Flash - see animation applications

·    KAI power tools

·    Jasc Web Draw

·    Logo Ease- web based software

·         The Flame project - Open source software used to create SVG files 

Raster based-applications:

·     

    Raster images are primarily used with photos, which is why Photoshop is a raster editing program. Adobe Illustrator, on the other hand, is a vector drawing program that automatically creates your vector formulas as you draw.

·         raster images are resolution dependent.

·         When you change the size of a raster image, you shrink or stretch the pixels themselves which can result in a significant loss of clarity and very blurry image.