How do you read the current `wbColorTemp` value?

luxd

I found this great RGB Camera Control tutorial for setting values like wbColorTemp, contrast, expCompensation, etc. but I want to read the current values.

How do I actually read these current values? It looks like I should be able to read the values once I have a RawCameraControl reference, but my question is how do I attain it?

dai::RawCameraControl rawCtrl=???;

In the RawCameraControl source the below code displays comments for the expected value ranges. I want to query/read these values from the camera at any given time. How do I do that?

jakaskerl

Hi luxd
ImgFrame class has a few getters that should retrieve you the information.

Thanks,
Jaka

luxd

jakaskerl

jakaskerl ImgFrame class has a few getters that should retrieve you the information.

I tied this approach, but I get 0 values for getCategory(), getColorTemperature(), and getSensitivity(). Any idea why? Do I need to be in a specific ControlMode, SceneMode, or something similar before these values produce non-zero results?

jakaskerl

Hi luxd
How exactly are you retrieving them? Could you show some minimal code?

Thanks,
Jaka

luxd

jakaskerl

jakaskerl How exactly are you retrieving them? Could you show some minimal code?

Sure thing, this is how I'm currently doing it. If anything sticks out generally don't hesitate to suggest recommendations.

erik

Hi @luxd , this works as expected for me:

#!/usr/bin/env python3

import cv2
import depthai as dai

pipeline = dai.Pipeline()
camRgb = pipeline.create(dai.node.ColorCamera)
xoutVideo = pipeline.create(dai.node.XLinkOut)
xoutVideo.setStreamName("video")
camRgb.setBoardSocket(dai.CameraBoardSocket.CAM_A)
camRgb.video.link(xoutVideo.input)

with dai.Device(pipeline) as device:

    video = device.getOutputQueue(name="video", maxSize=1, blocking=False)

    while True:
        imgFrame: dai.ImgFrame = video.get()

        print(imgFrame.getColorTemperature(), imgFrame.getSensitivity())
        cv2.imshow("video", imgFrame.getCvFrame())

        if cv2.waitKey(1) == ord('q'):
            break

luxd

erik Thank you for confirming, I'll look into it deeper.

erik video = device.getOutputQueue(name="video", maxSize=1, blocking=False)

Would you expect it still to work if your getOutputQueue call was for "preview" instead of "video" ?

erik

@luxd yes