Pixel Count and Mystery Pictures
The number of pixels in an image tells you the picture’s resolution. More pixels means a higher resolution, allowing you to distinguish more details in the picture.
View a movie on the impact of pixel size.
View the image of pixel size on an image of a landscape.
Materials
PixelView software can increase and decrease the resolution of the image, so that you can see how many pixels are necessary to recognize the picture’s subject.
Download the software and see a brief tutorial.
Consider downloading the demonstration version since it includes 10 mystery pictures included in the programs interface.
Download mystery images if you don't use the demonstration version (stuffed or zipped).
What To Do...
When you open an image in PixelView, it will be at the lowest resolution: 2x2=4 pixels.
Increase the number of pixels until you can make out what the picture is.
In the table below, record the resolution needed to recognize the mystery pictures.
At what resolution can you recognize the subject of the picture?
What is the subject of this picture? Put answers on separate paper
Extensions
You may use PixelView with any digital photograph – capture interesting (and free and non-copyrighted) pictures or take your own with a digital camera. Save any resolution to your computer and include in reports.
Go to Pixel Color
Back to Introduction to Pixels
Back to Digital Image Investigations
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