如何使用 Emgu C# 对图像进行去饱和处理
How to desaturate an image using Emgu c#
我知道我们通过降低饱和度通道中的值来降低图像的饱和度。我想使用 c# 和 emgu
来完成这个
例如这里是使用 opencv 的 c++ 代码:
Mat Image = imread("images/any.jpg");
// Specify scaling factor
float saturationScale = 0.01;
Mat hsvImage;
// Convert to HSV color space
cv::cvtColor(Image,hsvImage,COLOR_BGR2HSV);
// Convert to float32
hsvImage.convertTo(hsvImage,CV_32F);
vector<Mat>channels(3);
// Split the channels
split(hsvImage,channels);
// Multiply S channel by scaling factor
channels[1] = channels[1] * saturationScale;
// Clipping operation performed to limit pixel values
// between 0 and 255
min(channels[1],255,channels[1]);
max(channels[1],0,channels[1]);
// Merge the channels
merge(channels,hsvImage);
// Convert back from float32
hsvImage.convertTo(hsvImage,CV_8UC3);
Mat imSat;
// Convert to BGR color space
cv::cvtColor(hsvImage,imSat,COLOR_HSV2BGR);
// Display the images
Mat combined;
cv::hconcat(Image, imSat, combined);
namedWindow("Original Image -- Desaturated Image", CV_WINDOW_AUTOSIZE);
在 c# 中我有:
var img = new Image<Gray, byte>("images/any.jpg");
var imhHsv = img.Convert<Hsv, byte>();
var channels = imhHsv.Split();
// Multiply S channel by scaling factor and clip (limit)
channels[1] = (channels[1] * saturationScale);
我不确定如何将修改后的饱和通道与 imHsv
合并,如果我这样做:
CvInvoke.Merge(channels, imhHsv);
有错误:
cannot convert 'Emgu.CV.Image[]' to
'Emgu.CV.IInputArrayOfArrays'
我将 VectorOfMat
放入 CvInvoke.Merge
中,它起作用了。
Mat[] m = new Mat[3];
m[0] = CvInvoke.CvArrToMat(channels[0]);
m[1] = CvInvoke.CvArrToMat(channels[1]);
m[2] = CvInvoke.CvArrToMat(channels[2]);
VectorOfMat vm = new VectorOfMat(m);
CvInvoke.Merge(vm, imhHsv);
我知道我们通过降低饱和度通道中的值来降低图像的饱和度。我想使用 c# 和 emgu
来完成这个例如这里是使用 opencv 的 c++ 代码:
Mat Image = imread("images/any.jpg");
// Specify scaling factor
float saturationScale = 0.01;
Mat hsvImage;
// Convert to HSV color space
cv::cvtColor(Image,hsvImage,COLOR_BGR2HSV);
// Convert to float32
hsvImage.convertTo(hsvImage,CV_32F);
vector<Mat>channels(3);
// Split the channels
split(hsvImage,channels);
// Multiply S channel by scaling factor
channels[1] = channels[1] * saturationScale;
// Clipping operation performed to limit pixel values
// between 0 and 255
min(channels[1],255,channels[1]);
max(channels[1],0,channels[1]);
// Merge the channels
merge(channels,hsvImage);
// Convert back from float32
hsvImage.convertTo(hsvImage,CV_8UC3);
Mat imSat;
// Convert to BGR color space
cv::cvtColor(hsvImage,imSat,COLOR_HSV2BGR);
// Display the images
Mat combined;
cv::hconcat(Image, imSat, combined);
namedWindow("Original Image -- Desaturated Image", CV_WINDOW_AUTOSIZE);
在 c# 中我有:
var img = new Image<Gray, byte>("images/any.jpg");
var imhHsv = img.Convert<Hsv, byte>();
var channels = imhHsv.Split();
// Multiply S channel by scaling factor and clip (limit)
channels[1] = (channels[1] * saturationScale);
我不确定如何将修改后的饱和通道与 imHsv
合并,如果我这样做:
CvInvoke.Merge(channels, imhHsv);
有错误:
cannot convert 'Emgu.CV.Image[]' to 'Emgu.CV.IInputArrayOfArrays'
我将 VectorOfMat
放入 CvInvoke.Merge
中,它起作用了。
Mat[] m = new Mat[3];
m[0] = CvInvoke.CvArrToMat(channels[0]);
m[1] = CvInvoke.CvArrToMat(channels[1]);
m[2] = CvInvoke.CvArrToMat(channels[2]);
VectorOfMat vm = new VectorOfMat(m);
CvInvoke.Merge(vm, imhHsv);