Fun gym Cambridge Nationals R001

Link to the scenario The website has a ‘news’ section, which includes photographs and features on instructors, members and special events. Bridget takes most of the photographs for this section herself, and optimises them so that they are suitable for use. The website includes a ‘members only’ section. This is a restricted area that members use to book their classes. Security and Encryption Pages 33 to 35

Compression & File Types Compression is used to reduce file sizes and change various attributes of an image file. These attributes include: File Type – e.g. jpeg (Joint Photographic Experts Group) Resolution - Quality Dimensions - Size Bit depth - number of bits

Lossy and lossless compression

Types of compression - Lossy Data is removed during compression before transmission. When the file is received by the recipient it does not revert to its original state. Data loss is permanent This is usually not enough to be noticed This is mainly used for images, video and sound files. Q: Why is this? Q: If the file is sent on again and again how will this impact the file quality?

Types of compression - Lossless Data is removed during compression before transmission. When the file is received by the recipient it does revert to its original state. Data loss is not permanent This is important for file types which cannot lose any of its data e.g. a text document. Q: Why would lossy not be suitable for a text document?

Compression images Click Here

Question 1) Describe the difference between Lossy and Lossless compression. Giving an example where each would be used in Fun Gym. [4] 2) Bridget intends to upload photographs to the ‘news’ section of the website. What might be the best file type and why? [4]

optimising Why do it? Optimising your images will reduce your website’s page loading times, reduce bandwidth and improve the browsing experience for visitors. Your search engine ranking should also improve due to your pages loading quicker. Remember that whilst compressing an image will reduce file size, quality can also be notably reduced if you compress an image too much. It is therefore important to get the balance between image quality and image file size right.

Optimising Use specific optimising software. RIOT GIMP Photo editing software allows you to optimise images to upload to the internet. ‘SAVE AND OPTIMISE FOR WEB’ File Format Crop Thumbnail views FOR MORE INFO CLICK HERE

File Types – Internet standards What are these common file extensions used for? .mpeg .jpg .pdf .doc .mp3 .mp4 .wmv .avi .ppt .xls .gif .exe .rtf .bmp

Questions 1) State two file types suitable for images to be uploaded to FUN GYMS website [2] 2) Bridget shoots her photos with a DSLR and uses the SD Card to transfer the photographs onto her computer. State one type of software that is most suitable for editing images.[1] 3) With the amount of photos Briget would like to upload to the companies website what are the steps she could take to ensure the customers experience wasn’t slowed down or delayed? [5]