I am plotting rectangles on images in deepstream-app using gstdsexample. gstdsexample is added inside config file as [ds-example] enable=1 #processing-width=960 #processing-height=544 full-frame=1 blur-objects=0 unique-id=15 Then I have access to cv::Mat as cv::Mat in_mat = cv::Mat (surface->sur…

Hi @edit_or , Really sorry for long delay! Regarding the mask, please check deepstream_tao_apps/nvdsinfer_custombboxparser_tao.cpp at release/tao3.0 · NVIDIA-AI-IOT/deepstream_tao_apps · GitHub , and you can run below command to check its output $ SHOW_MASK=1 ./apps/tao_detection/ds-tao-detection…

I understand the code. But I don’t understand why boxes’ coordinates don’t match to image size 1920x1080. Then now I change display color to cv::Mat roi = in_mat(cv::Rect(x1, y1, x2-x1, y2-y1 )); cv::Mat color(roi.size(), CV_8UC4, cv::Scalar( 0, 0, 255 )); double alpha = 0.3; cv::addWeig…

cv::Mat will do the operation on CPU side, I would suggest you to use the API nvidia provide, refer NvBufSurfTransformCompositeBlend NVIDIA DeepStream SDK API Reference: Main Page

[image] bcao: NvBufSurfTransformCompositeBlend Is there a sample how to use this api? NvBufSurfTransform_Error NvBufSurfTransformCompositeBlend ( NvBufSurface * src0 , NvBufSurface * src1 , NvBufSurface * alpha , NvBufSurface * dst , NvBufSurfTransformCompositeBlendParams * blend_params ) It…

We don’t have an example currently.

So how can I use? No example and even no proper documentation. Where can I find parameters for this structure NvBufSurfTransformCompositeBlendParams?

[image] edit_or: NvBufSurfTransformCompositeBlendParams Refer https://docs.nvidia.com/metropolis/deepstream/sdk-api/BufSurfTransform/_NvBufSurfTransformCompositeBlendParams.html?highlight=nvbufsurftransformcompositeblendparams#_CPPv439_NvBufSurfTransformCompositeBlendParams , all the public A…

I prefer using nvdosd. Can I use nvdosd from gst-dsexample? I like to add mask_params to nvdsosd->frame_mask_params->mask_params_list. If possible, do you have sample?

I would not suggest you to do it in that way, it’s not easy to implement and debug the issue you will meet in that way compared with call the API DS provided

Issue with plotting on image in deepstream-app

Accelerated Computing Intelligent Video Analytics DeepStream SDK

bcao August 9, 2021, 8:13am 3

refer DeepStream SDK FAQ - #18 by bcao

Topic		Replies	Views
Plot rectangle on image DeepStream SDK	6	1133	September 14, 2021
Not able to draw line on incoming frame DeepStream SDK	14	2363	April 27, 2020
Access video frame and use opencv to draw on it in pad probe callback DeepStream SDK	18	4364	January 4, 2021
How to draw rectangle on NvBufSurface by nvll_osd_draw_rectangles? DeepStream SDK	11	930	September 26, 2023
Segmentation fault on plotting rectangle on image DeepStream SDK	9	689	February 2, 2024
How to crop the image and save DeepStream SDK	46	17091	July 25, 2021
How to NvBufSurface to cv::Mat? DeepStream SDK	11	878	July 2, 2024
RTSP camera access frame issue DeepStream SDK	36	11360	July 7, 2021
Can I create depth image from NvBufSurface? DeepStream SDK	59	934	December 24, 2024
Unable to DUMP_ROIS in gst-nvdspreprocess DeepStream SDK nvbugs	10	770	January 29, 2024

Issue with plotting on image in deepstream-app

Related topics