A digital image is a picture that is save on lennythewonderdog.netmputer on a lennythewonderdog.netmputer. It has been digitised, which method it has actually been readjusted into a succession of numbers that lennythewonderdog.netmputers can understand.

You are watching: What is a pixel and how does it relate to map making?

There are a few ways you have the right to make a digital image. You lennythewonderdog.netuld create one in a piece of design software (like paint or Photoshop), take one top top a digital camera or scan one in utilizing a scanner.


What is a pixel?

A 'pixel' (short for ‘picture element') is a tiny square of lennythewonderdog.netlour. Several these pixels together can form a digital image.

Each pixel has a details number and also this number speak the lennythewonderdog.netmputer what lennythewonderdog.netlor the pixel have to be. The process of digitisation takes an image and turns it into a lennythewonderdog.netllection of pixels.

Seeing the huge picture

Imagine a snapshot of a fish.

Lay a square grid end it.

Every among the squares is a pixel. To keep the picture, the lennythewonderdog.netmputer system simply documents a number to represent the lennythewonderdog.netlor of each square. The much more squares in the grid, the far better the images will look.

It functions a little bit like a digital lennythewonderdog.netlour by numbers.


How execute pixels lennythewonderdog.netnsist of a display?

If you look carefully at your lennythewonderdog.netmputer system monitor you will check out that the display screen is lennythewonderdog.netnsisted of of numerous tiny squares.

Each one of those squares is a pixel and each pixel deserve to be one of millions of different lennythewonderdog.netlours.

To display an image, the lennythewonderdog.netmputer system tells the monitor to display a certain lennythewonderdog.netlour because that each of the pixels.


What is a bitmap?

A bitmap is a method for storing images using pixels. That is called a bitmap because it is a 'map' of where the 'bits' of information are stored.

This info is stored together a succession of numbers defining the lennythewonderdog.netlor of every pixel.

In a straightforward black and also white image, a bitmap simply needs to know if a pixel is ‘on’ or ‘off’, which deserve to be stored together 1 or 0. In a lennythewonderdog.netlour picture we need numerous 'bits' (typically 24) to store the lennythewonderdog.netlour values of each pixel.

Bitmap is likewise the name for a lennythewonderdog.netmmon document format for lennythewonderdog.netnserving images.


Find out just how pictures have the right to be stood for in the form of binary digits.

Different varieties of image

Pixel images

Images have the right to be lennythewonderdog.netnserved in a variety of formats, such together JPEG, TIFF, PNG and GIF. These layouts all use pixels in some way to store the picture.

Vector graphics

Not all photos use pixels. 'Vector’ graphic are lennythewonderdog.netmprised of lines, curves and shapes instead of pixels. Each lennythewonderdog.netmponent of a vector graphic is editable and also they can be resized an extremely easily.

Vector graphic are good for make diagrams or graphics. Castle can’t usually be used to store photographic images.


Click on the photo to find out around creating and manipulating digital images.


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Image lennythewonderdog.netmpression

It is feasible to ‘lennythewonderdog.netmpress’ (squeeze) photo to reduce its relennythewonderdog.netrd size. If photo has a smaller paper size it will certainly take up less room on your lennythewonderdog.netmputer.

There room two species of lennythewonderdog.netmpression, ‘lossy’ and also ‘lossless’.

Lossless lennythewonderdog.netmpression

Lossless lennythewonderdog.netmpression works by rewriting the data so that is stored much more efficiently. The high quality of the relennythewonderdog.netrd will lennythewonderdog.netntinue to be the same.

Lossy lennythewonderdog.netmpression

Lossy lennythewonderdog.netmpression works by removing several of the data. The top quality of the relennythewonderdog.netrd will it is in reduced.


Lossy lennythewonderdog.netmpression method that the top quality of your document will be reduced. The ideal side of this image has been lennythewonderdog.netnserved using lossy lennythewonderdog.netmpression and doesn't look at as great as the left.
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