There are two ways in which computer graphics can be generated on a computer: as vectors or as bitmaps. Bitmapped images consist of a series of tiny squares called pixels, while vector graphics are essentially instructions to a computer to create a series of geometrical shapes each with a given set of attributes. Bitmaps are typical continuous tone images such as photographs. Vectors are typical flat artwork designs such as logos, charts, symbols and illustrations.
Vector images can be created in a number of programs. Firstly, you can use specialist graphics programs like AutoCad. Then we have the general purpose drawing programs such as Adobe Illustrator and CorelDRAW. And, finally, there are many non-graphic programs which nevertheless inlude drawing tools. This last category would include the Microsoft Office suite of programs.
Since vector images are essential mathematical formulas, the quality of such images is not fixed but, rather, depends on the environment in which the image is created. If an image is displayed on the screen, it will be rendered at screen resolution; if it is printed on a high resolution printer, it will be printed at high resolution; and so on.
In contrast to vector graphics, bitmapped images are typically acquired rather than created from scratch. Photos are often loaded onto a computer from a digital camera or from a scanner. As far as manipulating bitmapped images, the most widely used software has got to be Adobe Photoshop. This powerhouse program is available in a few different flavours such as Photoshop Elements as well as the main program: Photoshop CS4. Other bitmap editing programs include Corel PHOTO-PAINT and Paint Shop Pro.
Another key difference between the two types of image is that the quality of bitmapped images is determined when the image is acquired: when the photograph is taken or when the print is scanned. Although the quality of a bitmap can be reduced (a process known as downsampling), it is not possible to increase its resolution or quality.
As regards conversion from one image type to another, converting a vector image to a bitmap is far easier than attempting the reverse. The process of converting vectors to bitmaps is known as rasterization and is usually very successful and most software will allow you to specify the quality of the resulting bitmap. To convert a bitmap into a vector, you will normally trace the lines and filled areas of the bitmap. However, the resulting vector image is normally not very easy to manipulate.
So, which is easier to learn, vector drawing programs or bitmap editing programs? Well, on our Adobe training courses, we find that most delegates seem to find bitmapped images easier to work with. This may of course simply be because they find working with rich media more visually appealing. However, we normally advice delegates who plan to undergo Adobe Creative Suite training to begin with a Photoshop course before tackling Adobe Illustrator.
Vector images can be created in a number of programs. Firstly, you can use specialist graphics programs like AutoCad. Then we have the general purpose drawing programs such as Adobe Illustrator and CorelDRAW. And, finally, there are many non-graphic programs which nevertheless inlude drawing tools. This last category would include the Microsoft Office suite of programs.
Since vector images are essential mathematical formulas, the quality of such images is not fixed but, rather, depends on the environment in which the image is created. If an image is displayed on the screen, it will be rendered at screen resolution; if it is printed on a high resolution printer, it will be printed at high resolution; and so on.
In contrast to vector graphics, bitmapped images are typically acquired rather than created from scratch. Photos are often loaded onto a computer from a digital camera or from a scanner. As far as manipulating bitmapped images, the most widely used software has got to be Adobe Photoshop. This powerhouse program is available in a few different flavours such as Photoshop Elements as well as the main program: Photoshop CS4. Other bitmap editing programs include Corel PHOTO-PAINT and Paint Shop Pro.
Another key difference between the two types of image is that the quality of bitmapped images is determined when the image is acquired: when the photograph is taken or when the print is scanned. Although the quality of a bitmap can be reduced (a process known as downsampling), it is not possible to increase its resolution or quality.
As regards conversion from one image type to another, converting a vector image to a bitmap is far easier than attempting the reverse. The process of converting vectors to bitmaps is known as rasterization and is usually very successful and most software will allow you to specify the quality of the resulting bitmap. To convert a bitmap into a vector, you will normally trace the lines and filled areas of the bitmap. However, the resulting vector image is normally not very easy to manipulate.
So, which is easier to learn, vector drawing programs or bitmap editing programs? Well, on our Adobe training courses, we find that most delegates seem to find bitmapped images easier to work with. This may of course simply be because they find working with rich media more visually appealing. However, we normally advice delegates who plan to undergo Adobe Creative Suite training to begin with a Photoshop course before tackling Adobe Illustrator.
About the Author:
Author is a developer and trainer with Macresource Computer Solutions, a UK IT training company offering Adobe Photoshop and Illustrator Classes in London and throughout the UK.
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