Mean Square Error Approximation For Wavelet-Based Semiregular Mesh Compression

As information carrier, the quilt already applies to an image broadly be a field more. Digital picture data amount is very big but , needs to carry out compression on the image right away for economizing memory space and transferring better. That the so-called image compresses is one kind of process cutting down the primitive image data amount on the premise of certain image mass and satisfied certain request in guarantee right away. Specifically for the redundancy information that the image there exists in middle, can adopt some unnecessary kind of method takeoff components, such can realize the image compression right away.The tradition image compression adopt DCT alternation code , "block effect " appear on the meeting compressing the queen but, at the same time, that compressed efficiency is neither high , the small wave image encodes is to analyse development of theory in recent years with minor wave but one kind suggesting that has the very good development prospect image code method. Frequency analyses , much resolution ratio analysis waits for merit when wavelet analysis is had, easy to combine with person eye optesthesia characteristic property each other , may gain fairly good compression effect, this kind of signal's has handled the special appositeness in the image , the image code method that the because of minor various wave shifts has attached great importance to , appeared therefore the method that the minor wave shifts accepts people's.Method applies to the standard net lattice at present mainly owing to minor wave compression , compressing heavy structure queen image mass is not that height , distortion degree are very higher and. Specifically for above-mentioned 2 o'clock, the main body of a book have studied the minor specifically for half regulation net lattice wave compresses mainly , have brought forward one kind of place assignment model-based effective function optimization method and here in process, for the assignment method realizing this fleetness and low complicated degree , approximation having wielded the weight mean square error in the code in geometry method. Use experiment bear fruit to explain that result in the as said or narrated above similar process Lieutenant General method distributing owing to the model is the function lacking fidelity being able to improve the minor wave coder, improves code gain and , reach the purpose improving image mass under not reducing image compressibility thereby.