LEVEL 3 GAME DESIGN UNIT 78 - DIGITAL GRAPHICS FOR COMPUTER GAMES IMAGE RESOLUTION/ QUANTITY P1 UNDERSTAND THEORY & APPLICATION OF DIGITAL GRAPHIC

LEVEL 3 GAME DESIGN

UNIT 78 - Digital Graphics for computer games

Image Resolution/ Quantity P1 UNDERSTAND THEORY & APPLICATION OF DIGITAL GRAPHIC

Picture Resolution

Resolution is the quality of the image. As the image becomes clearer, it becomes sharper more defined, and more detailed. This is because there is more information in the small space.

You can see what’s going on here. The more we increase the resolution of the graphic, the clearer the A becomes. Now let’s multiply the 10 by 10 resolution by 5 to get a 50 by 50 square.

 It still doesn’t have that crisp quality. To get that, we’ll need to increase the resolution even more. Let’s multiply it by 2.

This image is at full resolution.

You can make an image seem smoother than it otherwise would by using a technique known as anti-aliasing. This smooths out the jagged edges in text, or angled lines in your image. I've turned on anti-aliasing for this last 'A' and you'll see it appears smoother.

If you ever need to crop an image or make it smaller, never ever resize it back up to the original size! Doing so will kill the quality of the image, and you’ll be left with nothing but a blurry mess. Just remember that you can always go down in size, but once you do, it’s irreversible.

Pac-Man which was published in 1980. The image quality is 8-bit.

Half-Life 2 was published in 2004. The image quality is 64-bit.

Image Resolution

Image resolution is not how the image appears on the screen, image resolution is how your image will print.

8MP camera took this picture. This looks really good because this is small photo. Since the actual size will make it look blurry.

Intensity (Pixel Value)

Each pixels represents an image stored inside a computer has a pixel value which describes how bright that pixel is, or what colour it should be. The pixel value is a 1-bit number indicating either foreground or background. For a grayscale image the pixel value is single number that represents the brightness of the pixel. Pixel format is where this number is stored as an 8-bit integer giving a range of possible values form 0 to 255. Zero is black, and 255 is white. Values in between make up different shades of grey.