opencv编辑单波段并重新合并

我有一个图像,我把它分成三个独立的通道(B,G,R)。我只想操纵红色波段,然后重新合并到蓝色和绿色波段,重新组合图像。不过,我的函数中一直有一个sig abort。这个 RBandSlider 指用于轨迹栏的全局int,默认为1。几乎可以肯定的是,问题在 ImageEnhancement 功能。

我需要定义 redBandsAdjsuted 或者我没有抓取像素并正确地重写它?

Mat ImageEnhancement(Mat band){
Mat adjustedBand;
Scalar mean, std;
meanStdDev(band, mean , std);
int pixel,temp;
for(int i = 0; i < band.rows;i++){
    for(int j = 0; j < band.cols;j++){
        //extract pixel
        pixel = band.at<Vec3b>(i,j)[0];
        //pixel greater than mean
        if ( pixel > mean[0]){
            temp = (255);
            adjustedBand.at<Vec3b>(i,j) = temp;
        }
        else{
            temp = 0;
            adjustedBand.at<Vec3b>(i,j) = temp ;
        }
    }
}
return adjustedBand;
}


Mat Bands[3],merged,redBandsAdjusted(image.cols,image.rows,CV_8UC1),result;
split(image, Bands);

//loop the echancement adjustment
while(true){


    //adjust red band and merge
    redBandsAdjusted = ImageEnhancement(Bands[2]);
    vector<Mat> channels = {Bands[0],Bands[1],redBandsAdjusted};
    merge(channels,merged);

}