Image transmission by two-dimensional contour coding

摘要: The results of a computer simulation an image transmission system are reported. A reduction in the total number bits required to describe picture by factor 4 23 is possible as compared with 6-bit PCM. In this treated two-dimensional signal spatial coordinates x and y. large changes brightness occur at edges objects accentuated visual system. edge points can be isolated gradient or Laplacian operator. fact that these lie along connected contours two dimensions used code location characteristics each point efficiently. Two-dimensional reconstruction filters derived synthesize high frequency from decoded information. low-pass out-of-focus also formed which transmitted relatively small bits. After accentuation make appear "sharper," "synthetic highs" added yield final output.