This exhibit illustrates the simplest way of creating a digital image. A number of light sensors are placed in a grid with a light source on top. Every sensor is connected to a small light on the other side of the exhibit. By covering the sensor grid with an object, the grid copies its pattern and lights on the other side are turned on. This is a simple digital image. The more sensors you have, the better the image will be. We call this resolution.
How do digital cameras work and what is meant by the resolution of an image? A digital image that is recorded by any kind of camera has a specific resolution. The resolution is measured in pixels per inch. The number of pixels per inch is responsible for the size of a graphical file.
- Put your hand on the grid of light sensors.
- See what happens to the grid of lights that are connected to these sensors.