Find List PixelFormat for Specific Camera

[LucasVandroux]

Hello,

As mentioned in #2 I am having trouble capturing images with my Ace acA1920-40gc. My biggest problem is that the camera is a color one but I can't figure out how to get a color image and all the images are in black and white.

Following the instruction on ImagingHub, I figured out that I should change the PixelFormat of the camera before starting the recording:

# Simply get the first available pylon device.
first_device = pylon.TlFactory.GetInstance().CreateFirstDevice()
camera = pylon.InstantCamera(first_device)
camera.Open()

# Optional if you set it in Pylon Viewer
camera.PixelFormat = 'RGB8'

camera.StartGrabbing(pylon.GrabStrategy_LatestImages)

However, I get the following error:

An exception occurred.
Traceback (most recent call last):
  File "demo1.py", line 111, in detect_defects
    camera.PixelFormat = 'RGB8'
  File "/home/lucas/anaconda3/envs/demo1/lib/python3.6/site-packages/pypylon/pylon.py", line 4199, in __setattr__
    self.GetNodeMap().GetNode(attribute).SetValue(val)
  File "/home/lucas/anaconda3/envs/demo1/lib/python3.6/site-packages/pypylon/genicam.py", line 2611, in SetValue
    return _genicam.IEnumeration_SetValue(self, entry)
_genicam.InvalidArgumentException: Feature 'PixelFormat' : cannot convert value 'RGB8', the value is invalid. : InvalidArgumentException thrown in node 'PixelFormat' while calling 'PixelFormat.FromString()' (file 'Enumeration.cpp', line 132)

My guess is that RGB8 is definitely not the right thing to use. Is there a list of the different PixelFormat I can use with my camera?

Thanks in advance for your time.

Have a good day,

[basler-oss]

Hi Lucas, the list of supported pixel formats can be found in the camera manual or just open the camera with the pylon viewer and check for the list of pixel formats in the feature tree. Your camera has the following formats:
Mono 8, Bayer RG 8, Bayer RG 12, Bayer RG 12 Packed, YUV 4:2:2 Packed and YUV 4:2:2 (YUYV) Packed

[LucasVandroux]

@basler-oss thank you very much, this was really the problem. Now I know where to find the information.

I just used the following line instead of the previous one:

camera.PixelFormat = 'BayerRG8'

However, the problem was not in the fact the camera was not recording in color but it was that I was not saving the picture in the right format. Indeed, I should first convert it to the RGB format:

img = cv2.cvtColor(grabResult.Array, cv2.COLOR_BAYER_RG2RGB)

Thanks a lot for your patience and support 👍

[zarzar31]

@LucasVandroux
Thank you for your code. I also captured 16 bits BAYERRG images, and converted them to RGB using cv2.cvtColor like your code.
But, what the problem is that, my captured frames seems reddish.
So, could I get some idea to revise them?