Wednesday, 20 January 2016

What is Resolution?

Image resolution is the detail or infomation or pixels an image holds. The term applies to raster digital images, film images, and other types of images. Higher resolution means more image detail or more number of  pixels. Resolution is measured in DPI (dots per inch) or PPI (pixels per inch). These are literally the number of dots or pixels that can be placed side by side in a line one inch long. The more dots or pixels, the better the clarity – the higher the resolution – of the image. 

If you’ve ever seen a printed advertisement or even an online photograph that was blurry and undefined, that means it is low resolution.  Images that are clear and detailed are high resolution images. Low resolution images are best for online usage, due to the fact that a lot of web graphics and online photos are normally created at 72dpi because this make the file size smaller, therefore pages load quickly. Computers generally capture images at 72dpi, but if we try to print the same picture, though it may by clear on the screen, it will print out jagged and hazy.

For print publications or commercial printing 300dpi is used. This is the resolution you see when pictures are clear, glossy, and detailed.

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