https://github.com/zchrissirhcz/smallcv
Lightweight Mat and imread()/imwrite()/imshow()
https://github.com/zchrissirhcz/smallcv
imread imshow lightweight opencv
Last synced: 10 months ago
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Lightweight Mat and imread()/imwrite()/imshow()
- Host: GitHub
- URL: https://github.com/zchrissirhcz/smallcv
- Owner: zchrissirhcz
- Created: 2020-12-06T15:38:36.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2024-06-17T17:20:23.000Z (almost 2 years ago)
- Last Synced: 2024-12-09T03:24:32.586Z (over 1 year ago)
- Topics: imread, imshow, lightweight, opencv
- Language: C
- Homepage:
- Size: 38.7 MB
- Stars: 80
- Watchers: 5
- Forks: 10
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: license/ncnn/LICENSE.txt
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README
# SmallCV
[](https://github.com/zchrissirhcz/smallcv/actions/workflows/unit_test.yml)
Small Computer Vision Library.
## Features
- Lightweight
- [x] C++11 based
- [x] Not including optimization
- Conformance
- [x] API like OpenCV
- [x] Same result on PC and Android
## APIs
Supported:
- `Mat`
- `imread()`/`imwrite()`/`imshow()`/`waitKey()`
- `cvtColor()`/`resize()`
- `putText()`/`rectangle()`/`circle()`/`line()`
Not supported:
- `Mat::clone()`
- `saturate_cast`
- `parallel_for_`
- `operator Point_`
## Getting Started
To build this project, you are assumed:
- Familiar with CMake based C/C++ building
- Install **glfw** for `imshow()`. See [deps/glfw_build](deps/glfw_build) for build hints.
- Modify [cmake/deps.cmake](cmake/deps.cmake) to specify dependencies paths.
```bash
cd build
./linux-x64.sh # Linux build
./Xcode.sh # macOSX build
.\vs2019-x64.cmd # Windows build
```
## Example Usage
```c++
#include
#include "smallcv.hpp"
int main() {
std::string image_path = "mingren.jpg";
cv::Mat image = cv::imread(image_path);
cv::Rect rect(100, 100, 233, 233);
cv::rectangle(image, rect, cv::Scalar(0,0,255), 2);
cv::imshow("mingren", image);
cv::waitKey(0);
cv::imwrite("mingren_swap.bmp", image);
return 0;
}
```
```c++
#include
#include "smallcv.hpp"
int main()
{
std::string image_path = "mingren.jpg";
//std::string image_path = "E:/projects/arccv/smallcv/build/vs2019-x64/mingren.jpg";
cv::Mat image = cv::imread(image_path);
cv::Rect rect(100, 100, 233, 233);
cv::rectangle(image, rect, cv::Scalar(0,0,255), 2);
cv::Mat bigger_image;
cv::Size ssize = image.size();
cv::Size dsize = ssize * 2;
cv::resize(image, bigger_image, dsize);
cv::Mat gray;
cv::cvtColor(image, gray, cv::COLOR_BGR2GRAY);
cv::putText(image, "image", cv::Point(60, 60), 10, 1, cv::Scalar(255, 0, 0), 2);
cv::putText(bigger_image, "bigger image", cv::Point(60, 60), 10, 1, cv::Scalar(255, 0, 0), 2);
cv::putText(gray, "gray", cv::Point(60, 60), 10, 1, cv::Scalar(255, 0, 0), 2);
cv::imshow("mingren", image);
cv::imshow("bigger image", bigger_image);
cv::imshow("gray", gray);
cv::waitKey(0);
cv::imwrite("image.png", image);
cv::imwrite("bigger_image.png", bigger_image);
cv::imwrite("gray.png", gray);
}
```
## Acknowledgement
SmallCV referenced the following projects：
- [OpenCV](https://github.com/opencv/opencv)
- [ncnn](https://github.com/tencent/ncnn)
- [shufaCV](https://github.com/scarsty/shufaCV)