c++ - YUV转RGB着色器边框神器

Question

我有 YUV 到 RGB 转换着色器。

struct Pixel_INPUT
{
    float4 pos  : SV_POSITION;
    float2 tex  : TEXCOORD0;
};

Texture2D textureY : register(t0);
Texture2D textureU : register(t1);
Texture2D textureV : register(t2);

SamplerState samstate
{
    MinFilter     = Anisotropic;
    MagFilter     = Anisotropic;
AddressU = Clamp;
AddressV = Clamp;
};

float4 PS(Pixel_INPUT input) : SV_Target
{
    float y = (1.1643f * textureY.Sample(samstate,input.tex) - 0.0625f);
    float u = textureU.Sample(samstate,input.tex) - 0.5f;
    float v = textureV.Sample(samstate,input.tex) - 0.5f;

   float r = y + 1.5958f * v;
   float g = y - 0.39173f * u - 0.81290f * v;
   float b = y + 2.017f * u;

   return float4(r,g,b,1);
}

但是我在图像的右侧有一条绿线，如下所示:

我使用 Clamp 地址模式，图像比原来的颜色更黄。

Answer 1

我有采样器状态

  samplerDesc.Filter   = D3D10_FILTER_ANISOTROPIC;
  samplerDesc.AddressU  = D3D10_TEXTURE_ADDRESS_MIRROR;
  samplerDesc.AddressV   = D3D10_TEXTURE_ADDRESS_MIRROR;
  samplerDesc.AddressW    = D3D10_TEXTURE_ADDRESS_MIRROR;
  samplerDesc.MaxAnisotropy = 8;
  samplerDesc.ComparisonFunc = D3D10_COMPARISON_NEVER;


   pDevice->CreateSamplerState(&samplerDesc,&SampState);

关于 Y U 和 V 纹理分辨率:U 和 V 纹理分辨率始终是 Y 分辨率的一半。