Exploratories   Introduction to Sampling
     

Description


Images are composed of pixels, but most people only have a folk appreciation of what pixels are; their flawed mental model often prevents them from understanding later concepts in signal processing.

Pixels are samples at specific points of continuous mathematical functions. To demonstrate this, the Introduction to Sampling Applet uses an image on screen to represent a continuous function. The student can then slide a scanline up and down to see how samples relate to spatial locations on the image and how the samples' values correspond to intensity at those locations.

In additon to introducing the concept of sampling, this applet also demonstrates and helps develop intuition about scanlines which we use throughout the later applets.

Audience


Computer science students and anyone trying to better understand the basics of signal processing.

Usage


Slide the scanline slider up and down to see how samples relate to spatial locations on the image and how the samples' values correspond to intensity at those locations.

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