The term pixel stands for the image point in a raster graphic. In English, this point is called “Picture Cell” – abbreviated: Pixel. Each displayed image remains made up of millions of pixels. In practice, the word pixel describes the individual pixels on a panel, for example, on a television or your home theater – or on a smartphone display. The finer the pixel grid, the higher the resolution of the show or screen. A standard full HD monitor has around 1920 x 1080 individual pixels. These remain arranged in a grid.
A pixel consists of several sub-pixels. These points in green, red, and blue come together to form a pixel in any color tone and thus create the overall picture in interaction with other pixels.
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How does a Pixel affect Image Quality?
With larger screens, each pixel is correspondingly larger. The dimensions and the distance between the unique points affect the sharpness and clarity of the respective image. If you look at a screen from a short distance, you can sometimes even see the fine subpixels. If a pixel is defective, it either always lights up or not at all. In the latter case, this means: it remains black. These pixel errors then stand out from the overall picture and may even affect the viewing experience.
Adjust the Pixel size on the display
It is sometimes advisable to change the pixel size. It remains complete quickly in the settings for many displays and monitors. You vary the resolution and, in this way, adjust the size of each pixel. For example, reduce the resolution from 1920 x 1080 to 1080 x 720 to reduce the number of pixels – with the same display size. The pixels become larger accordingly.
How Big is a Pixel?
Pixels are not of a fixed size. Instead, it depends on the resolution of the image. The following applies to printed photos: The resolution information remains known in pixels per inch (PPI). One inch is 2.54 cm. This information tells you how many pixels can remain found on one inch.
What are Megapixels?
The term megapixel remains mainly used in product descriptions for cameras and smartphones. Here, a high number of megapixels stands for high image quality. It can remain said that a megapixel comprises one million pixels. It defines the resolution of the image. With a higher resolution, a recording has more depth of detail. With a camera or smartphone camera, however, various other factors also play a decisive role.
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The Added Value of the High Resolutions
The added value of oversized resolutions is relatively low. Because the modern full HD displays with 1920 x 1080 pixels, i.e., 2.5 megapixels, can only reproduce the exact details precisely when you zoom in.
When printing photos, however, you should always use a high number of pixels. It allows you to enlarge individual sections or cut the desired areas without the notorious “stairs” visible.
How to Find the Optimal Resolution for your Pictures
If you want to design your website, the recommended resolution for photos is 72 PPI. When printing images, however, different guidelines apply to getting the best results. The distance of the viewer and the overall size must also remain taken into account. Instead of the unit PPI, the unit dpi for “dots per inch” is used here. For example, at a long viewing distance on an advertising panel – around 30 to 40 dpi are recommended for motifs larger than 2000 x 2500 mm. For posters smaller than 800 x 1500 mm, 100 to 150 dpi are advisable at an average viewing distance.
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