Question

我正在创建自己的基于PHP的应用程序，我想将RGB颜色更改为CIE 1931的xy格式。

如何将RGB颜色规格转换为CIE颜色空间？

Answer 1

首先用变换矩阵计算X，Y和Z，然后对结果进行归一化

X = 0.4124*R + 0.3576*G + 0.1805*B
Y = 0.2126*R + 0.7152*G + 0.0722*B
Z = 0.0193*R + 0.1192*G + 0.9505*B

规格化：

x = X / (X + Y + Z)
y = Y / (X + Y + Z)

Answer 2

这是我的Javascript版本。它应该对你有所帮助;）

Try this simple code in your activity:

 @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Checks the orientation of the screen
        if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
            iv.setRotation(90f);
            Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
        } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
            iv.setRotation(0);
            Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
        }
    }

and following line in your manifest in activity tag
            android:configChanges="orientation|keyboardHidden|screenSize"

PHP - 如何将RGB颜色转换为CIE 1931颜色规范

2 个答案: