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bag2image.py
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bag2image.py
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#coding:utf-8
import roslib;
import rosbag
import rospy
import cv2
from sensor_msgs.msg import Image
from cv_bridge import CvBridge
from cv_bridge import CvBridgeError
path="/home/autolabor/r&d/rgb/" #存放图片的位置
class ImageCreator():
def __init__(self):
self.bridge = CvBridge()
with rosbag.Bag('1.bag', 'r') as bag: #要读取的bag文件;
for topic,msg,t in bag.read_messages():
if topic == "/kinect2/qhd/image_color_rect": #图像的topic;
#print("111");
try:
cv_image = self.bridge.imgmsg_to_cv2(msg,"bgr8")
except CvBridgeError as e:
print e
timestr = "%.6f" % msg.header.stamp.to_sec()
#%.6f表示小数点后带有6位,可根据精确度需要修改;
image_name = timestr+ ".png" #图像命名:时间戳.jpg
cv2.imwrite(path+image_name, cv_image) #保存;
if __name__ == '__main__':
#rospy.init_node(PKG)
try:
image_creator = ImageCreator()
except rospy.ROSInterruptException:
pass