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Image Stitching for NVIDIA Jetson/User Guide/Gstreamer: Difference between revisions
Image Stitching for NVIDIA Jetson/User Guide/Gstreamer (view source)
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This page provides a basic description of the parameters to build a cudastitcher pipeline. | This page provides a basic description of the parameters to build a cudastitcher pipeline. | ||
= Cuda-Stitcher = | == Cuda-Stitcher == | ||
To build a cudastitcher pipeline use the following parameters: | To build a cudastitcher pipeline use the following parameters: | ||
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The sink marks the end of each camera capture pipeline and maps each of the cameras to the respective image index of the homography list. | The sink marks the end of each camera capture pipeline and maps each of the cameras to the respective image index of the homography list. | ||
== Pipeline Basic Example == | === Pipeline Basic Example === | ||
The pipelines construction examples assume that the homographies matrices are stored in the <code> homographies.json</code> file and contains 1 homography for 2 images. | The pipelines construction examples assume that the homographies matrices are stored in the <code> homographies.json</code> file and contains 1 homography for 2 images. | ||
=== Case: 2 Cameras === | ==== Case: 2 Cameras ==== | ||
To perform and display image stitching from two camera sources the pipeline should look like: | To perform and display image stitching from two camera sources the pipeline should look like: | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
=== Case: 2 Video Files === | ==== Case: 2 Video Files ==== | ||
To perform and display image stitching from two video sources the pipeline should look like: | To perform and display image stitching from two video sources the pipeline should look like: | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
== JSON file == | === JSON file === | ||
The homography list is a JSON formatted string that defines the transformations and relationships between the images. Here we will explore (with examples) how to create this file in order to stitch the corresponding images. | The homography list is a JSON formatted string that defines the transformations and relationships between the images. Here we will explore (with examples) how to create this file in order to stitch the corresponding images. | ||
=== Case: 2 Images === | ==== Case: 2 Images ==== | ||
[[File:Stitching 2 images example.gif|500px|frameless|none|2 Images Stitching Example]] | [[File:Stitching 2 images example.gif|500px|frameless|none|2 Images Stitching Example]] | ||
------ | ------ | ||
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With this file, we are describing a pair of images (0 and 1), where the given matrix will transform the image '''1''' based on '''0'''. | With this file, we are describing a pair of images (0 and 1), where the given matrix will transform the image '''1''' based on '''0'''. | ||
=== Case: 3 Images === | ==== Case: 3 Images ==== | ||
[[File:3 Images Stitching Example.gif|1000px|frameless|none|3 Images Stitching Example]] | [[File:3 Images Stitching Example.gif|1000px|frameless|none|3 Images Stitching Example]] | ||
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</pre> | </pre> | ||
=== Your case === | ==== Your case ==== | ||
You can create your own homography list, using the other cases as a guide. Just keep in mind these rules: | You can create your own homography list, using the other cases as a guide. Just keep in mind these rules: | ||
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# '''Image indices from 0 to N-1''': if you have N images, you have to use consecutive numbers from '''0''' to '''N-1''' for the target and reference indices. It means that you cannot declare something like <code>target: 6</code> if you have 6 images; the correct index for your last image is '''5'''. | # '''Image indices from 0 to N-1''': if you have N images, you have to use consecutive numbers from '''0''' to '''N-1''' for the target and reference indices. It means that you cannot declare something like <code>target: 6</code> if you have 6 images; the correct index for your last image is '''5'''. | ||
= Controlling the Overlap = | == Controlling the Overlap == | ||
You can set cropping areas for each stitcher input (sink pad). This will allow you to: | You can set cropping areas for each stitcher input (sink pad). This will allow you to: | ||
# Crop an input image without requiring processing time. | # Crop an input image without requiring processing time. | ||
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[[File:Stitching blocks top-bottom ROIs.png|800px|frameless|center|Top / Bottom cropping]] | [[File:Stitching blocks top-bottom ROIs.png|800px|frameless|center|Top / Bottom cropping]] | ||
= Projector = | == Projector == | ||
For more information on how to use the rr-projector please follow the [[RidgeRun Image Projector/User Guide/Rrprojector | Projector User Guide]] | For more information on how to use the rr-projector please follow the [[RidgeRun Image Projector/User Guide/Rrprojector | Projector User Guide]] | ||
= Cuda-Undistort = | == Cuda-Undistort == | ||
For more information on how to use the cuda-undistort please follow the [[CUDA Accelerated GStreamer Camera Undistort/User Guide/Camera Calibration | Camera Calibration section]] | For more information on how to use the cuda-undistort please follow the [[CUDA Accelerated GStreamer Camera Undistort/User Guide/Camera Calibration | Camera Calibration section]] | ||