Vector vs. Bitmap….like celebrity death match but not as fun <ul><li>Bitmap-based imagesVector-based images </li></ul><ul><li>Do not rely on mathematical formulas </li></ul><ul><li>Image is mapped onto a grid , the size of which is based on the images resolution </li></ul><ul><li>Defined mathematically by a computer </li></ul><ul><li>Mosaic of pixels, each holding a various colour. </li></ul><ul><li>Contain well-defined elements such as curves and shapes of various colours </li></ul><ul><li>File name extensions *.PSD , *.JPG , *GIF , *.TIF , or *.BMP . </li></ul><ul><li>File name extensions *.EPS , *.AI , *CDR , or *.DWG . </li></ul><ul><li>More suitable for photo-realistic images </li></ul><ul><li>Not good for displaying photo-realistic images eg. photos </li></ul>
GIF vs. JPEG….like Steve Irwin wrestling a crocodile but less perilous <ul><li>GIF, which stands for Graphics Interchange Format </li></ul><ul><li>GIF squashes the original image down it takes care not to lose any data. It uses a simple substitution method of compression. </li></ul><ul><li>limited to a palette of 256 colours or less </li></ul><ul><li>JPEG </li></ul><ul><li>to save space it just throws away parts of an image </li></ul><ul><li>depending on how much you want to compress the image the algorithm throws away the less significant part of the data (the smaller curves) which adds less to the overall "shape" of the image. </li></ul>
embedded graphic and a linked graphic differences….. Not quite life and death but pretty close <ul><li>Oopsie </li></ul><ul><li>We forgot this one and its really late </li></ul><ul><li>Sorry </li></ul>
'colour palette' bigguns and littleuns <ul><li>It is simply the range of colours of used in an image </li></ul><ul><li>A GIF file has a small colour palette </li></ul><ul><li>A TIFF file has a large colour palette </li></ul>
What is lossless compression ? Sounds pretty painful to be honest…. <ul><li>It is actually when file size is reduced without losing the original quality of the image </li></ul><ul><li>JPEG files are lazy and do not normally use this </li></ul><ul><li>It is important to reduce the artefacts in the image </li></ul>
PNG files according to the legend that is FBS skills wiki <ul><li>Older versions of internet explorer may not support PNG </li></ul><ul><li>Trying to import or export CGM files will often cause problems…..that’s just not cool. </li></ul>
Why .bmp format files are so naughty…. Not even the good kind of naughty <ul><li>When trying to rescale bitmap images problems occur. If the image is enlarged it becomes pixelated and the image would appear jagged and misshaped. Reducing the image would also distort it as when you reduce the size of the image you delete some of the pixels which make up the picture. Large images would also take up a lot of memory as the bit files are made of pixels and a large image would have a large number of pixels and would therefore take up a lot of money. </li></ul>
Flickr? <ul><li>Flickr is a website that allows you to upload, organise and share photos online. It allows you to keep in touch with friends and family via pictures, share pictures within groups that you have joined; you are also able to make collections and tag people in pictures and share them with others. Using Flickr you can create cards, DVD’s and many more. </li></ul><ul><li>You can upload your photos in five different ways using Flickr, once your pictures have been uploaded you can create albums or collections according to your needs or preferences. Once they are sorted into albums you can also share them in groups that can be private or public where people are able to comment on them. If you do not wish to join groups you can also share your photos by adding your friends and family on your contact list where they can see your photos and comment on them. </li></ul><ul><li>This resource is mainly recreational </li></ul>
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.