Issue No. 12 - December (1972 vol. 21)
W.H. Carter , Naval Research Laboratory
A troublesome error has been found in digital data which represents an image renormalized by a computer. The error, which takes the form of anomalous patterns in the switching sequence of certain bits, contributes unnecessary, signal-dependent noise to the-data. Experimental results illustrating this phenomenon are shown and a theoretical model is derived. The model shows that the phenomenon results from a qtiantization or roundoff error inherent in digital renormalization and describes its detailed behavior. A method for rescaling the data which does not lead to the introduction of noise is described.
Aliasing, binary representation error, computer processing, digital signal processing, image processing, quantization error, roundoff error.
V. Brown and W. Carter, "A Signal-Dependent Error Arising in Digitally Processed Images Due to Quantization," in IEEE Transactions on Computers, vol. 21, no. , pp. 1380-1385, 1972.