Resize.cpp

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#include <face_contour_detector/filters/Resize.h>
#include <string>
#include <opencv/cv.h>

namespace face_contour_detector {
        namespace filters {

                Resize::Resize() {
                        ResetParameters();
                }

                std::vector<Parameter> Resize::GetParameters() {
                        std::vector<Parameter> re;
                        std::string name("maxWidth");
                        re.push_back(Parameter(name, &m_maxWidth));
                        name = std::string("maxHeight");
                        re.push_back(Parameter(name, &m_maxHeight));
                        return re;
                }

                void Resize::Apply(const cv::Mat& input, cv::Mat& result) {
                        if (m_maxWidth < 0) {
                                m_maxWidth = 1;
                        }
                        if (m_maxHeight < 0) {
                                m_maxHeight = 1;
                        }
                        double widthFactor = double(input.rows)/double(m_maxWidth);
                        double heightFactor = double(input.cols)/double(m_maxHeight);
                        if (widthFactor > heightFactor && widthFactor > 1.0) {
                                cv::resize(input, result, cv::Size(0,0), 1.0/widthFactor, 1.0/widthFactor);
                        } else if (heightFactor > 1.0) {
                                cv::resize(input, result, cv::Size(0,0), 1.0/heightFactor, 1.0/heightFactor);
                        } else {
                                result = input;
                        }
                }

                void Resize::ResetParameters() {
                        m_maxWidth = 1024;
                        m_maxHeight = 768;
                }

                const std::string& Resize::GetFilterName() {
                        return m_filterName;
                }

                //static
                std::string Resize::m_filterName = std::string("Resize");
        } //namespace filters

} //namespace face_contour_detector