Right align NvOSD_TextParams

Accelerated Computing Intelligent Video Analytics DeepStream SDK
#1

I’m writing some text on the screen using a NvOSD_TextParams txt_params structure.
when i left align it to something i can set:

txt_params->x_offset = obj_meta->rect_params.left;
txt_params->y_offset = obj_meta->rect_params.top;

however if i want to right align it then i need to do something like:

txt_params->x_offset = obj_meta->rect_params.left + obj_meta->rect_params.width - txt_params->width;

except that txt_params->width is not available.

is there a different way to right align the text ?

#3

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
• DeepStream Version
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

#4

This is just a question about the API onscreen display API NVIDIA DeepStream SDK API Reference: On-Screen Display API
but anyway here are the details. I hope it helps you with answering the question about the API.

Jetson nano
Deepstream 6.0
Jetpack: 4.6
Issue Type: question

so the question is how to right align text NVIDIA DeepStream SDK API Reference: _NvOSD_TextParams Struct Reference if i can’t ask for the width of the TextParam.

#5

Can you share more on the requirement in your use case? Why it benefit your use case?

#6

no problem.
i have 2 bits of text that i want to show if the inference detects something.
on the left of a persons face i want to show ‘on phone’ and on the right ‘facemask’ (detected)

like this


┌──────────┬──┬───────────────┐
│ on phone │  │   facemask    │
├──────────.──┴────.──────────┤
│       ,─'         '─.       │
│     ,'               `.     │
│    ╱                   ╲    │
│   ;                     :   │
│   ;     .        .      :   │
│  ;     ( )      ( )      :  │
│  │      '        '       │  │
│  │           │           │  │
│  :           │           ;  │
│   :          ▼          ;   │
│   :                     ;   │
│    ╲     ──┐   ┌───    ╱    │
│     ╲      └───┘      ╱     │
│      `.             ,'      │
│        '─.       ,─'        │
│           `─────'           │
└─────────────────────────────┘

and because the face changes inside the image, i would like to draw it inside the face-box and have it left aligned for one text and right aligned for the other text.

#7

Seems you can achieve your target with currently design. Right? Right align is one better to have feature. Right?

#8

my question was if it was possible, then you ask what my use case is.
why don’t you just answer the question instead of passive aggressive “Right"s”?

i know i can make an ugly solution with the current api, i was just expecting a bit more from nvidia and nvidia support, that is all.

#9

I want to conform if the feature blocked you. I also want to know the use case to understand if it is one valueable feature we can add it in following DS release. Thanks for your sharing.

#10

so to get back to the original question:
can you confirm that there currently is no way to find out either the width of the text ? or is there a different way to right align text ?

#11

No. We do not provide such functions now.

1 Like
#13

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