Image Size

May 11, 2010

Image size has a close relationship to resolution and it determines the size at which an image is displayed within a selected media. Generally speaking, for printed images the largest image size is best, while images that you plan to use on the web can normally be of a smaller size.

As a rule, the size (in inches) at which images can be printed is calculated by dividing the number of pixels (horizontal and vertical values) by 300. This means that the printed image will use 300 pixels for every inch of the final output. This is known as the image resolution.

For example, if you have an image that is 4200 pixels by 2800 pixels you would be able to print a photograph that is 14 inches tall and 9.3 inches wide. We arrived at this number by first dividing 4200 by300 and then dividing 2800 by 300.

If you’re creating images you plan to use on the web, the pixel dimensions should be divided by 96 as this is the general resolution for computer monitors. If we were to divide 4200 by 96 and 2800 by 96 we would wind up with an image that was 42 inches tall by 28 inches wide. Needless to say, this is far too large to use on a web page.

To correct this problem you can select a lower resolution when taking your photograph. Another alternative would be to capture the image at its largest size and then reduce the image with an editing program like Photoshop. You do this by changing the value used in the image size window of the program.

So before you decide to take any photographs you should know what you plan to use the photograph for. If you’re creating an image that you want to blow up and have printed on canvas to display on your wall as art, then you will want to use the highest resolution possible.

On the other hand, if you are planning to use the image on a webpage, and you do not have a program like Adobe Photoshop, you could upload your image to a program like Paintbucket which allows you to resize your images. Once you have made the corrections there you could download the photograph to your computer to be used on your webpage.

Remember, keep taking lots and lots of photographs of your kids. You will be glad you did!

Betty Muscott, Child Photographer

Betty Muscott, Child Photographer

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One Response to “Image Size”

  1. Tweets that mention Decide Upon Image Size Before You Start Taking Photographs | Real Kids Photography -- on May 11th, 2010 6:02 am

    [...] This post was mentioned on Twitter by Betty A. Muscott. Betty A. Muscott said: Image Size: Image size has a close relationship to resolution and it determines the size at which an image is disp… [...]

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