Image Saver

Package Summary

ROS2 package to capture and save frames from rgb image topic (sensor_msgs/msg/Image).

• Mainteiner status: Mainteined
• Mainteiner: Fernando González [email protected]
• Author: Fernando González [email protected]
• License: BSD

Usage

$ ros2 run image_saver image_saver_node --ros-args -p image_topic:=[string] -p freq:=[double] -p prefix_name:=[string]

For example, to save images whose prefix is 'trial', the camera topic is /camera/rgb/image_raw and you want to save the frames to a frequency of 2 Hz:

$ ros2 run image_saver image_saver_node --ros-args -p image_topic:=/camera/rgb/image_raw -p freq:=2.0 -p prefix_name:=trial

It will save images like that:

trial_1616182640643867236.jpg  trial_1616182643641073523.jpg
trial_1616182641141531320.jpg  trial_1616182644140983536.jpg
trial_1616182641641003475.jpg  trial_1616182644641078351.jpg
trial_1616182642141174749.jpg  trial_1616182645141019454.jpg
trial_1616182642641633054.jpg  trial_1616182645641050103.jpg
trial_1616182643141471573.jpg

Nodes

image_saver_node

It is subscribed to the camera image topic (sensor_msg/msg/Image) and it save frames with .jpg format.

Parameters

• image_topic: RGB image topic. By default: /xtion/rgb/image_raw
• freq: Image saving frequency. It must be a double. By default, 5.0 Hz
• prefix_name: prefix for de output file name of the image. For example, if prefix is foo, the output image will be named something like foo_1616182643641073523.jpg, where 1616182643641073523 is de system time in nanoseconds. By default, an empty prefix name is used