# rgb2yuv

**Repository Path**: Hz092811/rgb2yuv

## Basic Information

- **Project Name**: rgb2yuv
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2023-11-17
- **Last Updated**: 2023-11-28

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# rgb2yuv

#### 介绍
该demo介绍了rgb转yuv444和yuv222，yuv444和yuv222转rgb以及如何获取屏幕截图到rgb，支持跨平台编译运行

#### 软件架构
由cmake编译运行

#### 使用说明

##### rgb转yuv444公式

```c++
            int yy = 0.299 * rInt + 0.587 * gInt + 0.114 * bInt;
            int u = -0.1684 * rInt - 0.3316 * gInt + 0.5 * bInt + 128;
            int v = 0.5 * rInt - 0.4187 * gInt - 0.0813 * bInt + 128;
            yy = (yy < 0) ? 0 : ((yy > 255) ? 255 : yy);
            u = (u < 0) ? 0 : ((u > 255) ? 255 : u);
            v = (v < 0) ? 0 : ((v > 255) ? 255 : v);
```

##### rgb转yuv420公式

```c++
            int yy = 0.299 * rInt + 0.587 * gInt + 0.114 * bInt;
            int u = -0.1684 * rInt - 0.3316 * gInt + 0.5 * bInt + 128;
            int v = 0.5 * rInt - 0.4187 * gInt - 0.0813 * bInt + 128;
            yy = (yy < 0) ? 0 : ((yy > 255) ? 255 : yy);
            u = (u < 0) ? 0 : ((u > 255) ? 255 : u);
            v = (v < 0) ? 0 : ((v > 255) ? 255 : v);
            yData[index] = yy;
            if (y % 2 == 0 && x % 2 == 0)
            {
                uData[uvIndex] = u;
                vData[uvIndex] = v;
            }
```

##### yuv转rgb公式

```c++
            int C = Y - 16;
            int D = U - 128;
            int E = V - 128;
            int R = (298 * C + 409 * E + 128) >> 8;
            int G = (298 * C - 100 * D - 208 * E + 128) >> 8;
            int B = (298 * C + 516 * D + 128) >> 8;
            R = (R < 0) ? 0 : ((R > 255) ? 255 : R);
            G = (G < 0) ? 0 : ((G > 255) ? 255 : G);
            B = (B < 0) ? 0 : ((B > 255) ? 255 : B);
```