Images

Images

The implications of image resolution

An image on the screen is made up of lots of dots of light called pixels. The resolution of an image is given as two numbers like this: 640 x 480, where 640 is the number of pixel columns in the width of the image and 480 is the number of pixel rows in the height of the image.

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By multiplying these two numbers you obtain the total number of pixels in the image. In this example, 640 x 480 = 307 200 pixels. As we normally use mega-pixels we divide this number by one million to give 0.3 M pixels

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​Column = 640

​Rows = 480

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Multiple Choice

An image on the screen is made up of lots of dots of light called

• Pixels

• software

• None of the abve

​An increased file size will have the following implications: attach the image to send with an email) the time taken will be greater. When you download the image (e.g. view the image on a website) the time will also be greater.

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» The file size will increase - this will have implications on the number of images you can store on storage media.

» Transmission time will be increased - when you upload (e.g. store the image on a website, social networking site or load the image on an auction site or save the image to the cloud or Adjusting image resolution Image resolution can be adjusted so as to reduce the file size.

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This is particularly important if the image is to be used on a website.

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There is only so long that a viewer of a web page will wait for it to load before clicking off the site and going to a different one.

Multiple Choice

The file size will increase - this will have implications on the number of images you can store on

• Storage medai

• computers

• desktop