matlab 图像upscaler的lanczos2程序

matlab 图像upscaler的lanczos2程序

因为要做fpga的图像upscaler，所以先搞了个matlab的程序验证，想了几天，看了点matlab的书，总算写了个可以用的

clear
clc
Inial_H = 800;Inial_V = 480;
Scaled_H = 1280; Scaled_V = 720;
A=imread('480p_in3.bmp');
[row col dem] = size(A);
red     = A(:,:,1);
green   = A(:,:,2);
blue    = A(:,:,3);
B = zeros(Scaled_V,Scaled_H,3,'uint16');
% Vscale linear interpolation
TmpAV = zeros(Scaled_V,Inial_H,3,'uint16'); %tmp after vscale
for dem_i=1:3
    for row_j=1:2:Inial_V
        for col_k=1:Inial_H
            Tmp_r = row_j+(row_j+1)/2-1;
            TmpAV(Tmp_r,col_k,dem_i) = A(row_j,col_k,dem_i);
            TmpAV(Tmp_r+1,col_k,dem_i) = A(row_j,col_k,dem_i)/3  + A(row_j+1,col_k,dem_i)/3*2;           
            if (row_j==Inial_V-1)
                TmpAV(Tmp_r+2,col_k,dem_i) = A(row_j + 1,col_k,dem_i);
            else
                TmpAV(Tmp_r+2,col_k,dem_i) = A(row_j + 1,col_k,dem_i)/3*2+ A(row_j + 2,col_k,dem_i)/3;
            end
        end
    end