C++ 代码实现高性能异构医疗成像系统
数据加载模块
从文件或其他来源加载医疗图像数据。
#include <iostream>
#include <fstream>
#include <vector>
// 加载图像数据的函数
std::vector<float> loadImage(const std::string& filename, int& width, int& height) {
std::ifstream file(filename, std::ios::binary);
if (!file) {
std::cerr << "无法打开文件" << std::endl;
exit(1);
}
// 假设文件头包含宽度和高度信息
file.read(reinterpret_cast<char*>(&width), sizeof(int));
file.read(reinterpret_cast<char*>(&height), sizeof(int));
std::vector<float> imageData(width * height);
file.read(reinterpret_cast<char*>(imageData.data()), width * height * sizeof(float));
file.close();
return imageData;
}
预处理模块
对图像数据进行预处理,如去噪、标准化等。
// 对图像数据进行预处理的函数
void preprocessImage(std::vector<float>& imageData, int width, int height) {
// 简单去噪示例:将每个像素的值减去其邻域内像素的平均值
std::vector<float> tempData = imageData;
for (int y = 1; y < height - 1; ++y) {
for (int x = 1; x < width - 1; ++x) {
float sum = 0.0f;
for (int ky = -1; ky <= 1; ++ky) {
for (int kx = -1; kx <= 1; ++kx) {
sum += tempData[(y + ky) * width + (x + kx)];
}
}
imageData[y * width + x] = imageData[y * width + x] - sum / 9.0f;
}
}
}
核心计算模块
利用GPU进行核心计算,如图像滤波、卷积等。
#include <cuda_runtime.h>
__global__ void convolutionKernel(const float* input, float* output, const float* kernel, int width, int height, int kernelSize) {
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
int halfKernel = kernelSize / 2;
if (x < width && y < height) {
float sum = 0.0f;
for (int ky = -halfKernel; ky <= halfKernel; ++ky) {
for (int kx = -halfKernel; kx <= halfKernel; ++kx) {
int ix = min(max(x + kx, 0), width - 1);
int iy = min(max(y + ky, 0), height - 1);
sum += input[iy * width + ix] * kernel[(ky + halfKernel) * kernelSize + (kx + halfKernel)];
}
}
output[y * width + x] = sum;
}
}
void convolveImage(const std::vector<float>& input, std::vector<float>& output, const std::vector<float>& kernel, int width, int height, int kernelSize) {
float *d_input, *d_output, *d_kernel;
cudaMalloc(&d_input, width * height * sizeof(float));
cudaMalloc(&d_output, width * height * sizeof(float));
cudaMalloc(&d_kernel, kernelSize * kernelSize * sizeof(float));
cudaMemcpy(d_input, input.data(), width * height * sizeof(float), cudaMemcpyHostToDevice);
cudaMemcpy(d_kernel, kernel.data(), kernelSize * kernelSize * sizeof(float), cudaMemcpyHostToDevice);
dim3 blockDim(16, 16);
dim3 gridDim((width + blockDim.x - 1) / blockDim.x, (height + blockDim.y - 1) / blockDim.y);
convolutionKernel<<<gridDim, blockDim>>>(d_input, d_output, d_kernel, width, height, kernelSize);
cudaMemcpy(output.data(), d_output, width * height * sizeof(float), cudaMemcpyDeviceToHost);
cudaFree(d_input);
cudaFree(d_output);
cudaFree(d_kernel);
}
后处理模块
对计算结果进行后处理,如增强对比度、边缘检测等。
// 对计算结果进行后处理的函数
void postprocessImage(std::vector<float>& imageData, int width, int height) {
// 简单的边缘检测示例:计算梯度
std::vector<float> tempData = imageData;
for (int y = 1; y < height - 1; ++y) {
for (int x = 1; x < width - 1; ++x) {
float gx = tempData[y * width + (x + 1)] - tempData[y * width + (x - 1)];
float gy = tempData[(y + 1) * width + x] - tempData[(y - 1) * width + x];
imageData[y * width + x] = sqrt(gx * gx + gy * gy);
}
}
}
结果展示模块
将处理后的图像数据展示出来或保存到文件。
#include <opencv2/opencv.hpp>
// 展示处理后的图像
void displayImage(const std::vector<float>& imageData, int width, int height) {
cv::Mat image(height, width, CV_32FC1, const_cast<float*>(imageData.data()));
cv::normalize(image, image, 0, 1, cv::NORM_MINMAX);
cv::imshow("Processed Image", image);
cv::waitKey(0);
}
// 保存处理后的图像
void saveImage(const std::string& filename, const std::vector<float>& imageData, int width, int height) {
cv::Mat image(height, width, CV_32FC1, const_cast<float*>(imageData.data()));
cv::normalize(image, image, 0, 1, cv::NORM_MINMAX);
image.convertTo(image, CV_8UC1, 255.0);
cv::imwrite(filename, image);
}
主函数
int main() {
int width, height;
std::vector<float> inputImage = loadImage("medical_image.raw", width, height);
std::vector<float> processedImage(width * height);
preprocessImage(inputImage, width, height);
std::vector<float> kernel = {
0.111f, 0.111f, 0.111f,
0.111f, 0.111f, 0.111f,
0.111f, 0.111f, 0.111f
};
convolveImage(inputImage, processedImage, kernel, width, height, KERNEL_SIZE);
postprocessImage(processedImage, width, height);
displayImage(processedImage, width, height);
saveImage("processed_medical_image.png", processedImage, width, height);
return 0;
}
依赖项
为了运行这段代码,需要安装OpenCV库。可以使用以下命令安装OpenCV:
sudo apt-get install libopencv-dev
Python 代码实现高性能异构医疗成像系统
依赖项
pip install pycuda opencv-python
数据加载模块
从文件或其他来源加载医疗图像数据。
import numpy as np
import cv2
def load_image(filename):
image = cv2.imread(filename, cv2.IMREAD_GRAYSCALE)
if image is None:
raise FileNotFoundError(f"Cannot open file {filename}")
return image.astype(np.float32) / 255.0
image = load_image('medical_image.png')
height, width = image.shape
预处理模块
对图像数据进行预处理,如去噪、标准化等。
def preprocess_image(image):
return cv2.GaussianBlur(image, (3, 3), 0)
preprocessed_image = preprocess_image(image)
核心计算模块
利用GPU进行核心计算,如图像滤波、卷积等。
import pycuda.driver as cuda
import pycuda.autoinit
from pycuda.compiler import SourceModule
mod = SourceModule("""
__global__ void convolutionKernel(const float* input, float* output, const float* kernel, int width, int height, int kernelSize) {
int x = blockIdx.x * blockDim.x + threadIdx.x;
int y = blockIdx.y * blockDim.y + threadIdx.y;
int halfKernel = kernelSize / 2;
if (x < width && y < height) {
float sum = 0.0f;
for (int ky = -halfKernel; ky <= halfKernel; ++ky) {
for (int kx = -halfKernel; kx <= halfKernel; ++kx) {
int ix = min(max(x + kx, 0), width - 1);
int iy = min(max(y + ky, 0), height - 1);
sum += input[iy * width + ix] * kernel[(ky + halfKernel) * kernelSize + (kx + halfKernel)];
}
}
output[y * width + x] = sum;
}
}
""")
def convolve_image(input_image, kernel):
height, width = input_image.shape
kernel_size = kernel.shape[0]
input_image_gpu = cuda.mem_alloc(input_image.nbytes)
output_image_gpu = cuda.mem_alloc(input_image.nbytes)
kernel_gpu = cuda.mem_alloc(kernel.nbytes)
cuda.memcpy_htod(input_image_gpu, input_image)
cuda.memcpy_htod(kernel_gpu, kernel)
block_size = (16, 16, 1)
grid_size = (int(np.ceil(width / 16)), int(np.ceil(height / 16)), 1)
func = mod.get_function("convolutionKernel")
func(input_image_gpu, output_image_gpu, kernel_gpu, np.int32(width), np.int32(height), np.int32(kernel_size), block=block_size, grid=grid_size)
output_image = np.empty_like(input_image)
cuda.memcpy_dtoh(output_image, output_image_gpu)
return output_image
kernel = np.array([[1, 1, 1],
[1, 1, 1],
[1, 1, 1]], dtype=np.float32) / 9.0
convolved_image = convolve_image(preprocessed_image, kernel)
后处理模块
对计算结果进行后处理,如增强对比度、边缘检测等。
def postprocess_image(image):
# Example: Apply edge detection
edges = cv2.Canny((image * 255).astype(np.uint8), 100, 200)
return edges.astype(np.float32) / 255.0
postprocessed_image = postprocess_image(convolved_image)
结果展示模块
将处理后的图像数据展示出来或保存到文件。
def display_image(image, title='Image'):
cv2.imshow(title, image)
cv2.waitKey(0)
cv2.destroyAllWindows()
def save_image(filename, image):
cv2.imwrite(filename, (image * 255).astype(np.uint8))
display_image(postprocessed_image, 'Processed Medical Image')
save_image('processed_medical_image.png', postprocessed_image)
主函数
if __name__ == '__main__':
image = load_image('medical_image.png')
height, width = image.shape
preprocessed_image = preprocess_image(image)
kernel = np.array([[1, 1, 1],
[1, 1, 1],
[1, 1, 1]], dtype=np.float32) / 9.0
convolved_image = convolve_image(preprocessed_image, kernel)
postprocessed_image = postprocess_image(convolved_image)
display_image(postprocessed_image, 'Processed Medical Image')
save_image('processed_medical_image.png', postprocessed_image)