프로고: [OpenCV] 기본사용

○ 생성

Mat image(height, width, CV_8UC3, 0);

Mat img = Mat::zeros(height, width,CV_32FC);

Mat img = Mat::zeros(height, width,CV_64FC);

○ 화소접근

Mat image;

image.at(j, i) = 255;

image.at(j, i)[channel] = 255;

cv::Mat_ img = image;

img(j, i) = 255;

uchar* data = image.prt( j );

data[i] = 255;

○ Saturation Arithmetics

I(x, y) = min(max(round(r), 0), 255)

I.at(y, x) = saturate_case(r)

dst(I) = saturate_cast(src1(I) * alpha + src2(I) * beta + gamma)

void addWeighted( InputArray src1, double alpha, InputArray src2, double beta, double gamma, OutputArray dst )

dst(I) = saturate_cast(|src(I) * alpha + beta|)

void convertScaleAbs(InputArray src, OutputArray dst, double alpha=1, double beta=0)

m(I) = saturate_cast(alpha * (*this)m(I) + beta)

void Mat::convertTo(OutputArray m, int rtype, double alpha=1, double beta=0 )

○ 기타

putText(img, "text", Point(x,y), FONT_HERSHEY_SIMPLEX, 1., Scalar(B, G, R), 1);

putText(img, "text", Point(x,y), FONT_HERSHEY_DUPLEX, 1., Scalar(B, G, R), 1);

Rect rt;
Mat sub = img(rt).clone();

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