MATLAB的HEVC帧内预测程序代码

以下是一个简单的MATLAB代码示例，用于实现HEVC的帧内预测：

function [predBlock] = intra_predict(image, blockSize, row, col, mode)
% image: 输入图像
% blockSize: 块大小
% row, col: 当前块的起始行和列
% mode: 帧内预测模式

% 获取参考像素
switch(mode)
    case 0 % 模式0：DC预测
        refBlock = image(row:blockSize + row - 1, col:blockSize + col - 1);
        p = mean2(refBlock);
        predBlock = ones(blockSize, blockSize) * p;
    case 1 % 模式1：水平预测
        refBlock = image(row:blockSize + row - 1, col - 1);
        predBlock = repmat(refBlock, [1, blockSize]);
    case 2 % 模式2：垂直预测
        refBlock = image(row - 1, col:blockSize + col - 1);
        predBlock = repmat(refBlock, [blockSize, 1]);
    case 3 % 模式3：左上角预测
        refBlock = image(row - 1, col - 1);
        predBlock = ones(blockSize, blockSize) * refBlock;
    case 4 % 模式4：右上角预测
        refBlock = image(row - 1, col + blockSize);
        predBlock = ones(blockSize, blockSize) * refBlock;
    case 5 % 模式5：左下角预测
        refBlock = image(row + blockSize, col - 1);
        predBlock = ones(blockSize, blockSize) * refBlock;
    case 6 % 模式6：垂直右下预测
        refBlock1 = image(row - 1, col + blockSize);
        refBlock2 = image(row - 2, col + blockSize);
        refBlock3 = image(row - 3, col + blockSize);
        refBlock4 = image(row - 4, col + blockSize);
        refBlock5 = image(row - 5, col + blockSize);
        refBlock6 = image(row - 6, col + blockSize);
        refBlock7 = image(row - 7, col + blockSize);
        refBlock = (refBlock1 + 2 * refBlock2 + 3 * refBlock3 + 4 * refBlock4 + 5 * refBlock5 + 6 * refBlock6 + 7 * refBlock7 + 8) / 16;
        predBlock = ones(blockSize, blockSize) * refBlock;
    case 7 % 模式7：水平右下预测
        refBlock1 = image(row + blockSize, col - 1);
        refBlock2 = image(row + blockSize, col - 2);
        refBlock3 = image(row + blockSize, col - 3);
        refBlock4 = image(row + blockSize, col - 4);
        refBlock5 = image(row + blockSize, col - 5);
        refBlock6 = image(row + blockSize, col - 6);
        refBlock7 = image(row + blockSize, col - 7);
        refBlock = (refBlock1 + 2 * refBlock2 + 3 * refBlock3 + 4 * refBlock4 + 5 * refBlock5 + 6 * refBlock6 + 7 * refBlock7 + 8) / 16;
        predBlock = ones(blockSize, blockSize) * refBlock;
end

end

请注意，此代码仅实现了HEVC的帧内预测的一些基本模式，可能需要根据您的特定需求进行更改和优化。