ADAPTIVE IMAGE TRANSMISSION METHOD USING ADAPTIVE BLOCK TRUNCATION CODING

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a progressive image transmission method using adaptive block truncation encoding, and more particularly, to a progressive image transmission method using adaptive block truncation encoding that can easily implement software or hardware due to a simple algorithm. The present invention aims to provide a new progressive image transmission method using adaptive block truncation coding with a simple algorithm and excellent data compression rate. To achieve the above object, the present invention provides an improved adaptive block truncation encoding method. Adaptive Block Truncation Coding (hereinafter referred to as ABTC) method and a new type of ABTC transmission parameter and transmission format are provided. The present invention provides a more improved HVS model. This is represented vertically as follows.; About T ₁ if k ₁ , = 0;T ₁ About T ₂ if k ₂ , = 0; For ≥ T ₂ if k ₃ , = 0;Where T ₁ = 50, T ₂ = 120, and k ₁ = -0.085 +40, k ₂ = 6, k ₃ = 0.075 +1.742;In the jnd model above Means each standard deviation, Means each mean. Using this equation, the method of having the improved ABTC applying the characteristics of the HVS to the expanded BTC is as follows. = , = X, if Back side = 0, i.e. = 0.; _{One h 1 h One One One h} ; _{2 One 2 in 1 2 2 2 One} ;The gradual transmission of the ABTC according to the present invention has all three passes. In the first pass, the degraded image is transmitted so that only the shape of the image can be recognized, and in the second pass, more detailed image information is reproduced through additional data transmission. In the third pass, the final image is played. Each of the second and third passes reproduces an image using data transmitted from the previous pass, so each pass has a hierarchical structure. In FIG. 5, the parameters to be transmitted for each pass are classified for the MP and MMSE in each pattern. The transmission format of the ABTC is largely composed of a header and a payload. The heading contains the information necessary for decoding. There are formats, mode-flags, pass-levels, vertical-sizes and horizontal-sizes.