Thursday, 5 October 2017

What is a Pixel?

Picture resolution
What is a Pixel?

A pixel is commonly thought of as "a square of colour" however this is incorrect. A pixel should be thought of as a point, this point can actually contain up to three primary colours which then contributes to the full image. Depending on the size of your monitor/screen only a certain amount of pixels can displayed, the lager the screen the better the quality of image.

Image Resolution:

Image resolution is effectively the quality of an image. The higher the resolution the higher the quality, the image becomes sharper, more defined and better detailed. This is because there is more information in the same space, any displayable digital device will have a certain number of pixels that it can display.

Image result for Pixel diagram

In the above image you can see how the number of pixels affects the quality of the image, looking at a 10 x 10 circle you can see how basic the image is. Because the edges are so jagged it doesn't even identify as a circle. However in the 25 x 25 diagram you can clearly see that it is a circle and the overall shape is better defined. With the 100 x 100 image the circle is clear and no jagged edges are visible. 

Picture Resolution:

Picture resolution is slightly different from image resolution in that it is based around the graphical capability of the device that is used to capture a real life picture. For example if somebody draws with a pen and pencil, photographs it with a digital camera and then import it into a computer, the resolution of the picture depends on the digital camera used to take the photo.

Intensity:

Within graphic design programs such as Photoshop there are thousands of colours available, for these colours they each have a value which defines how many shades of that colour there are. For example the colour red would have many shades from darker reds to lighter reds. Intensity is where for example you would use however many shades of a colour to colour something in a program. The more the shades you use the more values are used therefore the higher the intensity. 

Image result for Colour shades

In the above image there are several of the many shades of red, each shade has a value assigned to it, and depending on how many are dictates the level of intensity.

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