How to edit labels of detections? Can't get NvDsObjectMeta object to modify text_params,rect_params.bg_color, rect_params.border_width

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

• Hardware Platform (Jetson / GPU)
Jetson Orin
• DeepStream Version
6.1.1
• JetPack Version (valid for Jetson only)
5.0.2
• TensorRT Version
8.4.1-1+cuda11.4

Hello, in my Deepstream app I have 1 primary detector and 2 secondary detectors.
I am trying to hide or edit the labels of the detectors using:

obj_meta = pyds.NvDsObjectMeta.cast(l_obj.data)
obj_meta.text_params.display_text = "TEST"
it is not changing the label of the detection.
Also, I have set up different colors for each detector bounding box:
The first detector is blue, second is green and the third one is red
It is not working all bounding boxes are red.
obj_meta.rect_params.bg_color is not working.

Also if I set all detectors with obj_meta.rect_params.border_width = 0 the bounding boxes still show.

How can I fix this?

3

The label of the object is in NvDsObjectMeta. NvDsObjectMeta — Deepstream Deepstream Version: 6.1.1 documentation

Please check text_params and obj_label.

4

@Fiona.Chen I am already using NvDsObjectMeta object…
Below my code:

try:
    # Casting l_obj.data to pyds.NvDsObjectMeta
    obj_meta = pyds.NvDsObjectMeta.cast(l_obj.data)
except StopIteration:
    break
print(type(obj_meta))    # THE TYPE IS: <class 'pyds.NvDsObjectMeta'>
obj_meta.text_params.display_text = "TEST"
obj_meta.obj_label  = "TEST"
obj_meta.rect_params.border_width = 0
obj_meta.rect_params.has_bg_color = 1
obj_meta.rect_params.bg_color.red = 0.0
obj_meta.rect_params.bg_color.green = 0.0
obj_meta.rect_params.bg_color.blue = 1.0
obj_meta.rect_params.bg_color.alpha = 0.0

None of the obj_meta parameters work.
I have border_width = 0 the bboxes still show. All bboxes are color red and the labels are not changing.

5

Where did you change the text and color? Before nvdsosd or after nvdsosd?

6

Within def osd_sink_pad_buffer_probe.
This is my pipeline:

streammux.link(pgie)
pgie.link(tracker)
tracker.link(sgie1)
sgie1.link(sgie2)
sgie2.link(nvstreamdemux)

#I am using nvstreamdemux so the following is within a for loop
queue.link(nvvidconv1)
nvvidconv1.link(filter1)
filter1.link(nvvidconv)
nvvidconv.link(nvosd)
  
nvosd.link(tee)
queue1.link(msgconv)
msgconv.link(msgbroker)

queue2.link(nvvidconv_postosd)
nvvidconv_postosd.link(caps)
caps.link(encoder)
encoder.link(rtppay)
rtppay.link(sink)
7

@Fiona.Chen Also, I am unable to get the parent of NvDsObjectMeta object for my secondary detectors. Please help me. Thank you