So when I’m doing a blog post and want to add an image or photograph, or just add a photo to my gallery, I am bemused (to say the least) about people talking about pixels and dpi and references to sizes in KB or MB – whoosh that’s another subject that flies about 2 feet over my head!
Well, the Blogmistress set me the task of getting to grips with it, from the viewpoint of the uninformed!
Basically, all images are made up of several components:
Pixels – this word combines the 2 words “picture” and “element” and refers to the small dots that make up an image. Each pixel is a different colour, which when put together makes up the image itself. The more pixels an image has, the clearer and more defined the overall image will be. So, high pixel count is good….
Dpi – this stands for dots per inch and measures the resolution of an image. That might not sound much, until you know that it’s per line! So again, the higher the Dpi figure, the sharper the image will be. For web this only needs to be 72 but if you want things printed it needs to be at least 300.
KB and MB – this is the one that gets me (and plenty of others, I gather). Blogmistress says it is the size of the image, but as in how much space it takes up, not in the “physical” size in pixels.
And then there are things called thumbnails – smaller equivalents of the image you’re using but we’ll cover more on that another time
So there you have it in a nutshell. One of the most important things to be concerned about is that size matters – we really cannot be uploading images that are MB size, so I’d like to share this really helpful site that guides you through resizing your images – useful if your images are too big. http://www.resizeyourimage.com/ basically holds your hand through changing the number of pixels or the width/height of an image… it’s great and if it works for me then it’ll work for you! So, go play with it and have fun.
Thanks to Su Butcher for suggesting this mighty useful tool
And Babs has now done a screencast showing how to use this: