demo.py 文件源码

def demo(net, image_name, classes):
    """Detect object classes in an image using pre-computed object proposals."""

    # Load pre-computed Selected Search object proposals
    box_file = os.path.join(cfg.ROOT_DIR, 'data', 'demo',
                            image_name + '_boxes.mat')
    obj_proposals = sio.loadmat(box_file)['boxes']

    # Load the demo image
    im_file = os.path.join(cfg.ROOT_DIR, 'data', 'demo', image_name + '.jpg')
    im = cv2.imread(im_file)

    # Detect all object classes and regress object bounds
    timer = Timer()
    timer.tic()
    scores, boxes = im_detect(net, im, obj_proposals)
    timer.toc()
    print ('Detection took {:.3f}s for '
           '{:d} object proposals').format(timer.total_time, boxes.shape[0])

    # Visualize detections for each class
    CONF_THRESH = 0.8
    NMS_THRESH = 0.3
    for cls in classes:
        cls_ind = CLASSES.index(cls)
        cls_boxes = boxes[:, 4*cls_ind:4*(cls_ind + 1)]
        cls_scores = scores[:, cls_ind]
        dets = np.hstack((cls_boxes,
                          cls_scores[:, np.newaxis])).astype(np.float32)
        keep = nms(dets, NMS_THRESH)
        dets = dets[keep, :]
        print 'All {} detections with p({} | box) >= {:.1f}'.format(cls, cls,
                                                                    CONF_THRESH)
        vis_detections(im, cls, dets, thresh=CONF_THRESH)