Digital graphics for IMedia; Investigation

'Everything a beginner needs to know about digital images of photoshop...'

For my article about digital graphics of photoshop I researched different image formats such as Jpg, PSD,Tiff and more, I'm also looking at how images are captured, differences between formats and resolution. I copied and pasted the information I found from useful sites before highlighting what I thought was important and annotating the infomation.

JPG;  Works well on photographs, naturalistic artwork, 'real-world' scenes etc however they're not so good when it comes to lettering, cartoons and black and white lines. Jpg becomes 'lossy' this means that when the image is decompressed it won't be identical to the original image put in. JPG supports CMYK, RGB and grayscale colour spaces. It's supported in HTML and other web applications and when saved directly in jpg format compression, contrast, sharpness etc are applied.

PSD;  Photoshop files are written and read by Photoshop  but there are some other appplications that read this format. Most page layout applications won't allow images in PSD to be placed. PSD files keep all of the file attributes although to use PSD they must first be converted to a TIFF file.

TIFF; Raster-based file that is widely used in desktop publishing. It supports RGB, CMYK, grayscale, lab and indexed colour. The format uses compression but doesn't necessarily loose information while compressing  like Jpg does.

BMP; Mostly used on DOS and window based machines. It is a raster file that only RGB colour space and also bit depths of 1, 4, 8 and 24 bits per channel, this makes BMP unsuitable to use in high-end print production.

GIF; Used mainly for cartoon like graphics. It has an 8 bit format which means that the maxium number of colours supported by GIF is 256. There are two types of GIF formats, 87a and 89a with 89a having additional features like imporved interlacing, transparency and also the ability to store mutiple images in one file to create animation however only netscape supports animated GIF files.