error: cannot convert ‘float*’ to ‘double*’ for argument ‘4’ to ‘int flandmark_detect(IplImage*, int*, FLANDMARK_Model*, double*, int*)

I will study CMake later. For now I will use everything in the same directory.
I git clone the repo and put the example which I copy the website, name it as 'sarit.cpp'.
My questions is :
1. Do you think the developer confuses his own function? If he does. How can I fix it?

$ g++ sarit.cpp `pkg-config --cflags --libs opencv` sarit.cpp: In function ‘int main(int, char**)’: sarit.cpp:22:57: error: cannot convert ‘float*’ to ‘double*’ for argument ‘4’ to ‘int flandmark_detect(IplImage*, int*, FLANDMARK_Model*, double*, int*)’ flandmark_detect(img_grayscale, bbox, model, landmarks); And here is is my pkg-config
$ pkg-config --libs --cflags opencv -I/usr/include/opencv /usr/lib/x86_64-linux-gnu/libopencv_calib3d.so -lopencv_calib3d /usr/lib/x86_64-linux-gnu/libopencv_contrib.so -lopencv_contrib /usr/lib/x86_64-linux-gnu/libopencv_core.so -lopencv_core /usr/lib/x86_64-linux-gnu/libopencv_features2d.so -lopencv_features2d /usr/lib/x86_64-linux-gnu/libopencv_flann.so -lopencv_flann /usr/lib/x86_64-linux-gnu/libopencv_gpu.so -lopencv_gpu /usr/lib/x86_64-linux-gnu/libopencv_highgui.so -lopencv_highgui /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so -lopencv_imgproc /usr/lib/x86_64-linux-gnu/libopencv_legacy.so -lopencv_legacy /usr/lib/x86_64-linux-gnu/libopencv_ml.so -lopencv_ml /usr/lib/x86_64-linux-gnu/libopencv_objdetect.so -lopencv_objdetect /usr/lib/x86_64-linux-gnu/libopencv_ocl.so -lopencv_ocl /usr/lib/x86_64-linux-gnu/libopencv_photo.so -lopencv_photo /usr/lib/x86_64-linux-gnu/libopencv_stitching.so -lopencv_stitching /usr/lib/x86_64-linux-gnu/libopencv_superres.so -lopencv_superres /usr/lib/x86_64-linux-gnu/libopencv_ts.so -lopencv_ts /usr/lib/x86_64-linux-gnu/libopencv_video.so -lopencv_video /usr/lib/x86_64-linux-gnu/libopencv_videostab.so -lopencv_videostab My file :
#include "flandmark_detector.h" #include "cv.h" #include "opencv/highgui.h" int main(int argc, char * argv[]) { // load flandmark model structure and initialize FLANDMARK_Model * model = flandmark_init("flandmark_model.dat"); // load input image IplImage *img = cvLoadImage("photo.jpg"); // convert image to grayscale IplImage *img_grayscale = cvCreateImage(cvSize(img->width, img->height), IPL_DEPTH_8U, 1); cvCvtColor(img, img_grayscale, CV_BGR2GRAY); // bbox with detected face (format: top_left_col top_left_row bottom_right_col bottom_right_row) int bbox[] = {72, 72, 183, 183}; // detect facial landmarks (output are x, y coordinates of detected landmarks) float * landmarks = (float*)malloc(2*model->data.options.M*sizeof(float)); flandmark_detect(img_grayscale, bbox, model, landmarks); }