| 摘要 |
An input signal (20), e.g. an image comprising pixels (22), is processed by adding stochastic noise signals (24, fig. 6) to produce an output signal (28, fig. 7). The stochastic noise signals may be pseudorandom signals that may be successively added. A value of a function of the signal to noise ratio of the input signal may be determined, and the number of stochastic noise signals may equal the determined value. The stochastic noise signals may be generated by generating a pseudorandom initial stochastic signal having length greater than or equal to the length of the input signal multiplied by the number of noise signals. The initial stochastic signal may then be segmented. The stochastic noise signals may be a further image comprising a second number of pixels, that number may be greater than or equal to the number of pixels in the input image. Adding a stochastic noise signal to the input signal may comprise superimposing a noise image onto the input signal image, and may comprise adding a common noise value to each channel (e.g. R, G & B) value of each pixel. Apparatus performing the method may be used in aircraft. |
