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ROS image to PNG but as an object in the program, not to disk.

asked 2019-10-31 15:27:08 -0500

Heelbruise gravatar image


I am subscribing to a ROS Image topic. I need to take the ROS Image object, convert it to a .png and use it in a REST API client call (so I don't need to save it to disk). How can I transform the ROS Image to png in the program?


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answered 2019-10-31 16:36:23 -0500

ahendrix gravatar image

You should be able to use the cv_bridge package to convert an image to an OpenCV cv::Mat, and from there you can use cv::imencode to encode the image into PNG format.

I'm not sure how you would pass that to a REST API, but I assume the REST library that you're using will have documentation which covers that.

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Asked: 2019-10-31 15:27:08 -0500

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Last updated: Oct 31 '19