Hanisch, Frank-2015-12-102015-12-109-7-2007-http://dx.doi.org/10.2312/cgems04-11-1364This interactive teaching gem shows the convolution concept for continuous signals and discrete samples. Signals occurring frequently in computer graphics education are predefined; others can be drawn or integrated easily. We explain how the material can be used for in-class demonstration and for homework, and describe the experiences we made with two courses on image processing and introductionary computer graphics. Student reading is provided.Image processingSignal ProcessingAlgorithmicFundamentalsMathematicsImage Processing10.2312/cgems04-11-1364Frank Hanisch-Image processing, Signal Processing, Algorithmic, Fundamentals: Mathematics, Image Processing