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And, I think youre actually supposed to give something up for longer than a month.

Well, kinda, in the sense that understanding image resolution can definitely solve a lot of problems.

But really, no.

Thats right, the resolution of your image has absolutely nothing to do with how your image appears on screen.

It does, however, have everything to do with how your image will print.

Image resolution has absolutely nothing to do with how your image looks on screen.

I saw this little guy (or girl, who knows) posing for me on the flowers and happened to have my camera handy.

My camera, by the way, is an 8MP camera, and the reason why Im telling you this will be explained shortly.

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Lets pretend though for the sake of this lesson that were working with the full size version of the photo.

In order to see exactly how large the photo is, once we have it open inside Photoshop, we can simply go up to the Image menu at the top of the screen and choose Image Size from the list of options, which will bring up Photoshops Image Size dialog box, as shown below.

Its divided into two sections, Pixel Dimensions and Document Size.

For the moment, lets ignore the Document Size part and focus only on Pixel Dimensions.

What Photoshop is really telling us is the width and height of our image in pixels.

The dimensions and file size shown here are of the full size version of the photo above (the insect on the flower) before I resized it to something more suitable for a web page.

So here, Photoshop is telling me that my photo has a width of 3456 pixels and a height of 2304 pixels.

In other words, it contains 3456 pixels from left to right, and 2304 pixels from top to bottom.

To find out exactly how many pixels I have in my photo then, I can simply multiply the width times the height, which in this case is 3456 x 2304, which gives me a grand total of 7,962,624 pixels.

This means that when I take a photo with my digital camera, the photo will be made up of 8 million pixels (approximately, anyway).

If you have a 5MP camera, your photos will be made up of 5 million pixels.

MP cameras give you photos made up of 4 million pixels, and so on.

So if we take a look again at what the Pixel Dimensions section of the Image Size dialog box is telling us about my photo above, its saying that my photo has dimensions of 3456 pixels wide by 2304 pixels high, for a total of 7,962,624 pixels, which is pretty darn close to 8 million, and thats why my camera can be sold as an 8MP camera.

So far so good. Lets take a look now at the second part of the dialog box, Document Size, which is where we really start to make sense of image resolution.

Lets take a look at the Document Size section, and by the time were done, you should have a pretty good grasp on the difference between the two and on image resolution itself.

Notice at the bottom of the Document Size section, it says Resolution, and in the Resolution box, it says 72.

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