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In Graphic Design, pixels are the backbone to a great finished product. Using images that are too small and then increasing their size will ruin any designers best work. 
Pixels are small dots that are the basis for any image. A pixel is split into sub-pixels of red, blue and green. Pixels add together to make a bitmap image, a grid that resembles a mosaic of dots. The size and proximity of pixels will determine the quality of image, smaller and closer together will give a higher quality image. As any image is magnified, the size and proximity of the pixels increases so producing a distorted image with blurred integrity that produces inferior graphic results. You can test this by zooming in on a picure and the pixels or building blocks will become apparent. Take a look at media images of celebrities children and see how the faces are blurred out; a great example of pixelation.
Worth a read....
Pixels, resolution and vector images
CMYK and RGB Colour
Pixels are small dots that are the basis for any image. A pixel is split into sub-pixels of red, blue and green. Pixels add together to make a bitmap image, a grid that resembles a mosaic of dots. The size and proximity of pixels will determine the quality of image, smaller and closer together will give a higher quality image. As any image is magnified, the size and proximity of the pixels increases so producing a distorted image with blurred integrity that produces inferior graphic results. You can test this by zooming in on a picure and the pixels or building blocks will become apparent. Take a look at media images of celebrities children and see how the faces are blurred out; a great example of pixelation.
Worth a read....
Pixels, resolution and vector images
CMYK and RGB Colour
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