How to adjust the brightness and contrast of an image

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

HI

I am using the python code from this link jetson-inference/detectnet-example-2.md at master · dusty-nv/jetson-inference · GitHub. I need to adjust the brightness, or contrast of the image captured from the webcam. In opencv, I can easily do this by using

newImg = cv2.convertScaleAbs(image, alpha=1.5, beta=0).

How can I do this in below code:

while display.IsStreaming():
	img = camera.Capture()
	detections = net.Detect(img)
	display.Render(img)
	display.SetStatus("Object Detection | Network {:.0f} FPS".format(net.GetNetworkFPS()))
5

Sorry for the late response, have you managed to get issue resolved or still need the support? Thanks

6

Hi,

You can change the underlying GStreamer pipeline directly.
For the CSI camera, you can find the pipeline below:

For example, you can change it to a similar form as below:

$ gst-launch-1.0 nvarguscamerasrc saturation=1.5 ! nvvidconv !

The range of saturation is 0-2.
Please check with nvgstcapture-1.0 to know how to set the parameter.

Thanks.

8

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.