Training structured Forest for Fast Detection.

I have code of Structured Forests for Fast Edge Detection Piotr Doll´ar Microsoft Research [e-mail] C. Lawrence Zitnick Microsoft Research, I have a data set of 20 images and also have the ground truths of these 20 images in image format please see the picture.

</matlabcentral/answers/uploaded_files/91168/im0082.jpg> im0082 is image and its ground truth is given as in image im0082

Now i have have more 19 images and its ground truth images, how i can train structured Forest for Fast Detection by using its orignal code.