Parameter problem

[chenxyyy]

Hello！ @ghimiredhikura Thank you for your great work! I would like to ask two questions about the Parameter.

First:

utils/utils.py  

def non_max_suppression_rotated_bbox(prediction, conf_thres=0.95, nms_thres=0.4):
    """ 
        Removes detections with lower object confidence score than 'conf_thres' and performs
        Non-Maximum Suppression to further filter detections.
        Returns detections with shape:
            (x, y, w, l, im, re, object_conf, class_score, class_pred)
    """

     ……

You said that the prediction is N × 9，but when I debug the eval_mAP.py , I found that the prediction is N×10. I don‘t know why？

Second：

def rotated_bbox_iou_polygon(box1, box2):
    box1 = to_cpu(box1).numpy()
    box2 = to_cpu(box2).numpy()

    x,y,w,l,im,re = box1
    angle = np.arctan2(im, re)
    bbox1 = np.array(bev_utils.get_corners(x, y, w, l, angle)).reshape(-1,4,2)
    bbox1 = convert_format(bbox1)

Could you tell me the specific meaning of im and re? Is math.sin(float(yaw)) and math.cos(float(yaw))?