Working to brief

Contractual - Involves a signed agreement with stated objectives. If you or the other party were to break any agreements you would be in breech of contract and could face legal action

Negotiated - Two parties have differing ideas and a compromise has to be found that makes both sides happy, sometimes involving a third party (An arbitrator)

Informal - More of a verbal agreement between parties with nothing official or in writing, less formal so to speak

 Tender - The production company might find out someone is looking for a video. They put together a brief with a proposal and a budget and send it to the potential client. The client would look at all the different tenders they receive and choose the one they prefer.

 Co-operative brief - You work alongside other production companies or organisations who also have a brief therefore your brief has to co-operate with the brief they

Source: http://en.wikipedia.org/wiki/english_contract_law

Tagged Image File (TIFF) File extension *.tif

Main advantages: (1) no loss of image data and (2) free exchange between applications and computer platforms Main disadvantages: difficult to store, large file format. Main use: keep as original image file with all information intact.

Compuserve Graphics Interface Format (GIF) File extension *.gif

Main advantages: small file format, easy to store and display, can be made into a transparent image. Main disadvantage: loss of colour variation. Main use:  displaying images in greyscale, transparent images or images where colour variation is unimportant but where a small file size is desirable.

Joint Photographics Expert Group (JPEG) File extension *.jpg

Main advantages: retains up to 16,000,000 colours, ability to compress more or less to find a compromise between file format and image quality. Main disadvantages: "lossy" file format, file size larger than gif because of colour information. Main use: display of continuous tone images such as photographs on the Web or other online services.

PhotoShop images (PSD) File extension *.psd

Main advantages: good format for manipulating and changing images with control over separate image channels, layers and paths. Main disadvantages: only works within certain applications, not useful for display on the web or other online services. Main use: save images in PSD format as a useful "working tool" for further image manipulation and adjustment.

Source:http://www.iaaf.uwa.edu.au/imagetypeshortversion.html