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Spherical Video PTZ/User Guide/Quick Start Guide: Difference between revisions
Spherical Video PTZ/User Guide/Quick Start Guide (view source)
Revision as of 18:57, 25 March 2024
, 25 March→Spherical Video PTZ Engine
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#include "lp/engines/equirectangular_to_rectilinear.hpp" | #include "lp/engines/equirectangular_to_rectilinear.hpp" | ||
engines::EquirectangularToRectilinear<RGBA<uint8_t>> engine; | lp::engines::EquirectangularToRectilinear<RGBA<uint8_t>> engine; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Then, set the initial parameters with the '''SetParameters''' method: | Then, set the initial parameters with the '''SetParameters''' method: | ||
<syntaxhighlight lang=cpp> | <syntaxhighlight lang=cpp> | ||
engine.SetParameters(params); | lp::engine.SetParameters(params); | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Finally | |||
Finally, use the '''Process''' method with the input image as the first parameter. The second parameter will contain the result after applying the equirectangular to rectilinear projection transformation. | |||
<syntaxhighlight lang=cpp> | <syntaxhighlight lang=cpp> | ||
#include "lp/allocators/cudaimage.hpp" | #include "lp/allocators/cudaimage.hpp" | ||
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lp::allocators::CudaImage<RGBA<uint8_t>> dst; | lp::allocators::CudaImage<RGBA<uint8_t>> dst; | ||
engine.Process(img, dst); | lp::engine.Process(img, dst); | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Please note that the Engine supports both '''CudaImages''' and '''Images''' for processing. However, if you choose to use an Image, the Engine will internally allocate a Cuda buffer and copy the Image content into it, potentially affecting the application performance. | |||
Please note that the Engine supports both '''CudaImages''' and '''Images''' for processing. However, if you choose to use an Image, the Engine will internally allocate a Cuda buffer and copy the Image content into it, potentially affecting the application performance. Take this pseudo-code snippet as an loop example of the engine's usage: | |||
<syntaxhighlight lang=cpp> | |||
#include "lp/image.hpp" | |||
int main(int argc, char **argv) { | |||
ImageSize size{500, 500}; /* size of the output image */ | |||
const size_t rawsize = size.PixelCount(); | |||
OpenCV<RGBA<uint8_t>> io.Open(image_path); | |||
Image<RGBA<uint8_t>> img = io.ReadImage(); | |||
lp::Image<RGBA<uint8_t>> dst = | |||
Image(size, std::shared_ptr<RGBA<uint8_t>[]>(new RGBA<uint8_t>[rawsize])); | |||
engines::EquirectangularToRectilinear<RGBA<uint8_t>> engine; | |||
engines::EquirectangularToRectilinearParams params{{ | |||
{0.0f, 0.0f}, | |||
2.0f, | |||
}, | |||
{ | |||
dst.GetSize(), | |||
}, | |||
{io.GetSize()}}; | |||
engine.SetParameters(params); | |||
engine.Process(img, dst); | |||
for (int i = 1; i <= 100; i++) { | |||
params.equirectangular.r -= 0.05; /* zoom out */ | |||
params.equirectangular.viewpoint + Point2D{0.05f, 0.00f}; /* tilt right */ | |||
params.equirectangular.viewpoint + Point2D{0.00f, 0.05f}; /* pan up */ | |||
engine.SetParameters(params); | |||
engine.Process(img, dst); | |||
} | |||
} | |||
</syntaxhighlight> | |||
==GstRrPanoramaptz== | ==GstRrPanoramaptz== | ||