Image Perception and Sensing
This chapter covers some basics of image processing that are necessary in the applications in later chapters. We will discuss light, sensors, and the human visual system. We will talk about spatial and temporal properties of human vision and present a basic spatiotemporal frequency response of the eye–brain system. This information, interesting in its own right, will be useful for the design and analysis of image and video signal processing systems, which produce images and video to be seen by human observers.
6.1 Light and Luminance
We use the notation pi(x, y, t, λ) for incident radiant flux or light intensity (incident power) as a function of position (x, y) and time t at the spatial wavelength λ. ...
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