关于建设工程招标类的公共网站,企业怎么做好网站优化,上海做网站品牌公司有哪些,英雄联盟网站源码cuda小白 原始API链接 NPP
GPU架构近些年也有不少的变化#xff0c;具体的可以参考别的博主的介绍#xff0c;都比较详细。还有一些cuda中的专有名词的含义#xff0c;可以参考《详解CUDA的Context、Stream、Warp、SM、SP、Kernel、Block、Grid》
常见的NppStatus#xf…cuda小白 原始API链接 NPP
GPU架构近些年也有不少的变化具体的可以参考别的博主的介绍都比较详细。还有一些cuda中的专有名词的含义可以参考《详解CUDA的Context、Stream、Warp、SM、SP、Kernel、Block、Grid》
常见的NppStatus可以看这里。
7 是图像的傅里叶变换还在学习中
本文主要讲述的是形态学变换
Dilation
膨胀操作对二值化物体边界点进行扩充将与物体接触的所有背景点合并到该物体中使边界向外部扩张。如果两个物体间隔较近会将两物体连通在一起。
// 返回mask下的最大像素值作为输出的pixel如果mask的值为0则不参与最大值查询
NppStatus nppiDilate_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI,const Npp8u *pMask,NppiSize oMaskSize,NppiPoint oAnchor);
// 与前一个接口的区别是多了一个borderType的类型指定
/*
NppiBorderType {NPP_BORDER_UNDEFINED,NPP_BORDER_NONE,NPP_BORDER_CONSTANT,NPP_BORDER_REPLICATE,NPP_BORDER_WARP,NPP_BORDER_MIRROR
};
*/
NppStatus nppiDilateBorder_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,NppiSize oSrcSize,NppiPoint oSrcOffset,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI,const Npp8u *pMask,NppiSize oMaskSize,NppiPoint oAnchor,NppiBorderType eBorderType);
// 特定大小的kernel
NppStatus nppiDilate3x3_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI);code
#include iostream
#include cuda_runtime.h
#include npp.h
#include opencv2/opencv.hpp#define CUDA_FREE(ptr) { if (ptr ! nullptr) { cudaFree(ptr); ptr nullptr; } }int main() {std::string directory ../;cv::Mat image_dog cv::imread(directory dog.png);int image_width image_dog.cols;int image_height image_dog.rows;int image_size image_width * image_height;// device memory // inputuint8_t *in_image;cudaMalloc((void**)in_image, image_size * 3 * sizeof(uint8_t));cudaMemcpy(in_image, image_dog.data, image_size * 3 * sizeof(uint8_t), cudaMemcpyHostToDevice);// outputuint8_t *out_ptr1, *out_ptr2;cudaMalloc((void**)out_ptr1, image_size * 3 * sizeof(uint8_t)); // 三通道cudaMalloc((void**)out_ptr2, image_size * 3 * sizeof(uint8_t)); // 三通道NppiSize in_size;in_size.width image_width;in_size.height image_height;NppiRect rc;rc.x 0;rc.y 0;rc.width image_width;rc.height image_height;int mask_size 10;cv::Mat mat_mask cv::Mat::ones(mask_size, mask_size, CV_8UC1);uint8_t *mask;cudaMalloc((void**)mask, mask_size * mask_size * sizeof(uint8_t));cudaMemcpy(mask, mat_mask.data, mask_size * mask_size * sizeof(uint8_t), cudaMemcpyHostToDevice);cv::Mat out_image cv::Mat::zeros(image_height, image_width, CV_8UC3);NppStatus status;NppiSize npp_mask_size;npp_mask_size.width mask_size;npp_mask_size.height mask_size;NppiPoint pt;pt.x 0;pt.y 0;// nppiDilate_8u_C3R status nppiDilate_8u_C3R(in_image, image_width * 3, out_ptr1, image_width * 3, in_size, mask, npp_mask_size, pt);if (status ! NPP_SUCCESS) {std::cout [GPU] ERROR nppiDilate_8u_C3R failed, status status std::endl;return false;}cudaMemcpy(out_image.data, out_ptr1, image_size * 3, cudaMemcpyDeviceToHost);cv::imwrite(directory dilate.jpg, out_image);// nppiDilateBorder_8u_C3R NppiPoint src_pt;src_pt.x 100;src_pt.y 100;status nppiDilateBorder_8u_C3R(in_image, image_width * 3, in_size, src_pt, out_ptr2, image_width * 3, in_size, mask, npp_mask_size, pt, NPP_BORDER_REPLICATE);if (status ! NPP_SUCCESS) {std::cout [GPU] ERROR nppiDilateBorder_8u_C3R failed, status status std::endl;return false;}cudaMemcpy(out_image.data, out_ptr2, image_size * 3, cudaMemcpyDeviceToHost);cv::imwrite(directory dilate_border.jpg, out_image);// freeCUDA_FREE(in_image)CUDA_FREE(out_ptr1)CUDA_FREE(out_ptr2)
}make
cmake_minimum_required(VERSION 3.20)
project(test)find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})find_package(CUDA REQUIRED)
include_directories(${CUDA_INCLUDE_DIRS})
file(GLOB CUDA_LIBS /usr/local/cuda/lib64/*.so)add_executable(test test.cpp)
target_link_libraries(test${OpenCV_LIBS}${CUDA_LIBS}
)result 注意
nppiDilateBorder_8u_C3R 仅支持border的模式为 NPP_BORDER_REPLICATE其他模式会报错错误码为-9999。
Erode
腐蚀操作
NppStatus nppiErode_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI,const Npp8u *pMask,NppiSize oMaskSize,NppiPoint oAnchor);
NppStatus nppiErodeBorder_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,NppiSize oSrcSize,NppiPoint oSrcOffset,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI,const Npp8u *pMask,NppiSize oMaskSize,NppiPoint oAnchor,NppiBorderType eBorderType);
// 固定大小的Erode
NppStatus nppiErode3x3_8u_C3R(const Npp8u *pSrc,Npp32s nSrcStep,Npp8u *pDst,Npp32s nDstStep,NppiSize oSizeROI);
// nppiErode3x3Border_8u_C3R 不详细介绍了再此使用上一个实验膨胀之后的图像作为腐蚀的输入。
code
#include iostream
#include cuda_runtime.h
#include npp.h
#include opencv2/opencv.hpp#define CUDA_FREE(ptr) { if (ptr ! nullptr) { cudaFree(ptr); ptr nullptr; } }int main() {std::string directory ../;cv::Mat image_dog cv::imread(directory dilate.jpg);int image_width image_dog.cols;int image_height image_dog.rows;int image_size image_width * image_height;// device memory // inputuint8_t *in_image;cudaMalloc((void**)in_image, image_size * 3 * sizeof(uint8_t));cudaMemcpy(in_image, image_dog.data, image_size * 3 * sizeof(uint8_t), cudaMemcpyHostToDevice);// outputuint8_t *out_ptr1, *out_ptr2;cudaMalloc((void**)out_ptr1, image_size * 3 * sizeof(uint8_t)); // 三通道cudaMalloc((void**)out_ptr2, image_size * 3 * sizeof(uint8_t)); // 三通道NppiSize in_size;in_size.width image_width;in_size.height image_height;NppiRect rc;rc.x 0;rc.y 0;rc.width image_width;rc.height image_height;int mask_size 10;cv::Mat mat_mask cv::Mat::ones(mask_size, mask_size, CV_8UC1);uint8_t *mask;cudaMalloc((void**)mask, mask_size * mask_size * sizeof(uint8_t));cudaMemcpy(mask, mat_mask.data, mask_size * mask_size * sizeof(uint8_t), cudaMemcpyHostToDevice);cv::Mat out_image cv::Mat::zeros(image_height, image_width, CV_8UC3);NppStatus status;NppiSize npp_mask_size;npp_mask_size.width mask_size;npp_mask_size.height mask_size;NppiPoint pt;pt.x 0;pt.y 0;// nppiErode_8u_C3R status nppiErode_8u_C3R(in_image, image_width * 3, out_ptr1, image_width * 3, in_size, mask, npp_mask_size, pt);if (status ! NPP_SUCCESS) {std::cout [GPU] ERROR nppiErode_8u_C3R failed, status status std::endl;return false;}cudaMemcpy(out_image.data, out_ptr1, image_size * 3, cudaMemcpyDeviceToHost);cv::imwrite(directory erode.jpg, out_image);// nppiErodeBorder_8u_C3R NppiPoint src_pt;src_pt.x 100;src_pt.y 100;status nppiErodeBorder_8u_C3R(in_image, image_width * 3, in_size, src_pt, out_ptr2, image_width * 3, in_size, mask, npp_mask_size, pt, NPP_BORDER_REPLICATE);if (status ! NPP_SUCCESS) {std::cout [GPU] ERROR nppiErodeBorder_8u_C3R failed, status status std::endl;return false;}cudaMemcpy(out_image.data, out_ptr2, image_size * 3, cudaMemcpyDeviceToHost);cv::imwrite(directory erode_border.jpg, out_image);// freeCUDA_FREE(in_image)CUDA_FREE(out_ptr1)CUDA_FREE(out_ptr2)
}make
cmake_minimum_required(VERSION 3.20)
project(test)find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})find_package(CUDA REQUIRED)
include_directories(${CUDA_INCLUDE_DIRS})
file(GLOB CUDA_LIBS /usr/local/cuda/lib64/*.so)add_executable(test test.cpp)
target_link_libraries(test${OpenCV_LIBS}${CUDA_LIBS}
)result 注意点
nppiErodeBorder_8u_C3R 仅支持border的模式为 NPP_BORDER_REPLICATE其他模式会报错错误码为-9999。
ComplexImageMorphology
复杂图像形态学暂时不做介绍后续视情况而定 链接
