我正在尝试为白平衡设置自定义值。我相机应用程序中的温度颜色。我正在使用camera2 API,我正在尝试不同的方法来设置此值。我从excel文件中找到了一个方法,从白平衡值到100到100.000之间获得正确的RGB温度矩阵[红色,绿色,蓝色]。
我将此方法附加到Seekbar并且其工作正常,当我尝试将某些东西聚焦时,我的问题出现,然后它变成粉红色。屏幕上任何一种灯都像粉红色的火炬。
我正在以这种方式设置值:
mPreviewRequestBuilder.set(CaptureRequest.COLOR_CORRECTION_MODE, CaptureRequest.COLOR_CORRECTION_MODE_TRANSFORM_MATRIX);
RggbChannelVector rggb = getTemperatureVector(seekBackSelectedTemperature);
mPreviewRequestBuilder.set(CaptureRequest.COLOR_CORRECTION_GAINS, myRggbChannelVector);
换句话说,我得到矩阵的方法是这样的:
public static RggbChannelVector getTemperatureVector (int WhiteBalanceValue){
float InsertTemperature = WhiteBalanceValue;
float temperature = InsertTemperature / 100;
float red;
float green;
float blue;
//Calculate red
if (temperature <= 66)
red = 255;
else {
red = temperature - 60;
red = (float) (329.698727446 * (Math.pow((double) red, -0.1332047592)));
if (red < 0)
red = 0;
if (red > 255)
red = 255;
}
//Calculate green
if (temperature <= 66) {
green = temperature;
green = (float) (99.4708025861 * Math.log(green) - 161.1195681661);
if (green < 0)
green = 0;
if (green > 255)
green = 255;
} else
green = temperature - 60;
green = (float) (288.1221695283 * (Math.pow((double) red, -0.0755148492)));
if (green < 0)
green = 0;
if (green > 255)
green = 255;
//calculate blue
if (temperature >= 66)
blue = 255;
else if (temperature <= 19)
blue = 0;
else {
blue = temperature - 10;
blue = (float) (138.5177312231 * Math.log(blue) - 305.0447927307);
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
}
RggbChannelVector finalTemperatureValue = new RggbChannelVector(red/255,(green/255)/2,(green/255)/2,blue/255);
return finalTemperatureValue;
}
也许是因为我的CaptureRequest方法不正确,但我找不到解决方法。
答案 0 :(得分:12)
将模板更改为Still_capture或手动模板后,使用下一个方法:
captureBuilder.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest.CONTROL_AWB_MODE_OFF);
// adjust color correction using seekbar's params
captureBuilder.set(CaptureRequest.COLOR_CORRECTION_MODE, CaptureRequest.COLOR_CORRECTION_MODE_TRANSFORM_MATRIX);
captureBuilder.set(CaptureRequest.COLOR_CORRECTION_GAINS, CameraCapabilities.colorTemperature(Integer.parseInt(awbMode)));
public static RggbChannelVector colorTemperature(int whiteBalance) {
float temperature = whiteBalance / 100;
float red;
float green;
float blue;
//Calculate red
if (temperature <= 66)
red = 255;
else {
red = temperature - 60;
red = (float) (329.698727446 * (Math.pow((double) red, -0.1332047592)));
if (red < 0)
red = 0;
if (red > 255)
red = 255;
}
//Calculate green
if (temperature <= 66) {
green = temperature;
green = (float) (99.4708025861 * Math.log(green) - 161.1195681661);
if (green < 0)
green = 0;
if (green > 255)
green = 255;
} else {
green = temperature - 60;
green = (float) (288.1221695283 * (Math.pow((double) green, -0.0755148492)));
if (green < 0)
green = 0;
if (green > 255)
green = 255;
}
//calculate blue
if (temperature >= 66)
blue = 255;
else if (temperature <= 19)
blue = 0;
else {
blue = temperature - 10;
blue = (float) (138.5177312231 * Math.log(blue) - 305.0447927307);
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
}
Log.v(TAG, "red=" + red + ", green=" + green + ", blue=" + blue);
return new RggbChannelVector((red / 255) * 2, (green / 255), (green / 255), (blue / 255) * 2);
}
答案 1 :(得分:1)
另一种可能的解决方案:
factor 必须是0到100之间的值
private static RggbChannelVector computeTemperature(final int factor)
{
return new RggbChannelVector(0.635f + (0.0208333f * factor), 1.0f, 1.0f, 3.7420394f + (-0.0287829f * factor));
}