Needs["CV`"];
CVOpen[];
img=CVLoadImage["../hough/pic5.png",CVLoadImageUnchanged];
s=CVGetSize[img];
            
edit=CVJImageEditor["image",True];
CVJShowImage[edit,img];
            
liste1=CVJGetPixelPointList[edit]
 liste2=CVJGetUserPointList[edit]
ListPlot[liste2,PlotRange->{{0,1},{0,1}},AspectRatio->1]
CVJShowImage[edit,img];
liste3 = CVJGetPixelRectangleList[edit]
            
CVClose[];
