resampling.m

来自「图像插值程序」· M 代码 · 共 26 行

function [C] = resampling( firstWidth,firstHeight,lastWidth,lastHeight,A )
rateFirstWidth = LCM( firstWidth,lastWidth )/firstWidth;
rateFirstHeight = LCM( firstHeight,lastHeight )/firstHeight;
rateLastWidth = LCM( firstWidth,lastWidth )/lastWidth;
rateLastHeight = LCM( firstHeight,lastHeight )/lastHeight;

for i=1:1:lastHeight
    for j=1:1:lastWidth
        offsetX=(i-1)*rateLastHeight;
        offsetY=(j-1)*rateLastWidth;
        for x=1:1:rateLastHeight
            for y=1:1:rateLastWidth
                k = offsetX + x;
                t = offsetY + y;
                mapX = ceil( k/rateFirstHeight );
                mapY = ceil( t/rateFirstWidth );                
                tempMatrix( x,y ) = A( mapX,mapY );
            end
        end
        C( i,j ) = uint8( round( mean2( tempMatrix ) ) );            
    end
end