Digital images and video, acquired by still cameras, consumer camcorders, or even broadcast-quality
video cameras, are usually degraded by some amount of blur and noise. In addition, most electronic
camerashavelimitedspatial resolutiondeterminedbythecharacteristicsof thesensorarray. Common
causes of blur are out-of-focus, relative motion, and atmospheric turbulence. Noise sources include
filmgrain, thermal, electronic, and quantization noise.