Morriston Comprehensive School

Edexcel – Level 2
BTEC Certificate in Creative Media Production.

Unit:
12
Title:
2D Digital Graphics for Interactive and Print-based Media
Assignment:
12.1
Title:
What is Digital Graphics Technology
Date assignment set:
6th March 2015
Submission date:

27th March 2015

Assessment Criteria:
P1, M1 and D1

To achieve the assessment criteria the candidate will need to:
P1
outline the key characteristics of digital graphics technology.
M1
describe digital graphics technology with some detail and with reference to appropriate illustrative examples
D1
explain digital graphics technology with reference to precise and detailed examples, using correct technical language.

Assignment 1: What Is Digital Graphics Technology?

You have gained promotion from your market research job with “Virtual World”. You are now working for their sister company “Genesis”. This part of the company specialises in graphic design.

As part of their induction process, they require you to demonstrate your knowledge about 2D Digital Graphics by completing the following assignment.

1. What are pixels?
“a minute area of illumination on a display screen, one of many from which an image is composed.” Source Wikipedia.

2. What is image resolution?
Resolution is the quality of any bitmap image. The resolution of any picture is measured in DPI (Dots per Inch) .Resolution is also identified by the width and height of the image as well as the total number of pixels in the image.
3. How are pixels and image resolution linked?
The higher the number of pixels in any bitmap image the better the image quality would be. The typical resolution would be 72 pixels per inch for a website this is because a standard monitor cannot display a resolution more than this. 300 pixels per inch is the maximum resolution that most inkjet printers could support in a printed document. 4. What are raster images?
Raster graphics are digital images created or captured (for example, by scanning in a photo) as a set of samples of a given space. A raster is a grid of x and y coordinates on a display space. (And for three-dimensional images, a z coordinate.) A raster image file identifies which of these coordinates to illuminate in monochrome or color values.

5. What are vector graphics?
Vector graphics are created in graphics packages and consist of shapes called objects. It is possible to edit each object separately, for example, change the shape, colour, size and position. Even if an object in a vector graphic is quite large, it doesn't need a lot of computer memory. Therefore the file size of a vector graphic is often very small. Vector graphics are scalable - e.g. when you resize them, they do not lose quality.

6. What do the following file extensions mean and what are they used for?
Bmp – A bitmap graphic is composed of many tiny parts, called pixels, which are often many different colours. It is possible to edit each individual pixel. Jpeg -JPEG stands for Joint Photographic Experts Group. It is a standard method of compressing photographic images. We also call JPEG the file format which employs this compression. Png -Portable Network Graphics (PNG), is a raster graphics file format that supports lossless data compression. Tiff -TIFF is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry. Gif -The format supports up to 8 bits per pixel for each image. Graphics Interchange Format. pdf. - PDF (Portable Document Format) is a file format that has captured all the elements of a printed document as an electronic image that you can view
Wmf -Windows Metafile (WMF) is an image file format originally designed for Microsoft Windows in the 1990s. Windows Metafiles are intended to be portable between applications and may contain both vector graphics and bitmap components Psd - PSD file is a layered image file used in Adobe Photoshop. PSD, which stands for Photoshop