Kotlin Bytedeco OpenCV 图像图像57 图像ROI
- [1 添加依赖](#1 添加依赖)
- [2 测试代码](#2 测试代码)
- [3 测试结果](#3 测试结果)
1 添加依赖
kotlin
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xu</groupId>
<artifactId>KotlinOpenCV</artifactId>
<version>1.0</version>
<properties>
<kotlin.version>2.0.0</kotlin.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kotlin.code.style>official</kotlin.code.style>
<kotlin.compiler.jvmTarget>1.8</kotlin.compiler.jvmTarget>
</properties>
<repositories>
<repository>
<id>mavenCentral</id>
<url>https://repo1.maven.org/maven2/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.8.29</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.27.0</version>
</dependency>
<dependency>
<groupId>org.tukaani</groupId>
<artifactId>xz</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlinx</groupId>
<artifactId>kotlinx-coroutines-core</artifactId>
<version>1.9.0-RC</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>org.opencv</groupId>-->
<!-- <artifactId>opencv</artifactId>-->
<!-- <version>4100</version>-->
<!-- <scope>system</scope>-->
<!-- <systemPath>${project.basedir}/lib/opencv/opencv-4100.jar</systemPath>-->
<!-- </dependency>-->
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>opencv-platform</artifactId>
<version>4.10.0-1.5.11</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>org.bytedeco</groupId>-->
<!-- <artifactId>ffmpeg-platform</artifactId>-->
<!-- <version>6.1.1-1.5.10</version>-->
<!-- </dependency>-->
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test-junit5</artifactId>
<version>2.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.10.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib</artifactId>
<version>2.0.0</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/kotlin</sourceDirectory>
<testSourceDirectory>src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>2.0.0</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<configuration>
<mainClass>MainKt</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>2 测试代码
kotlin
package com.xu.com.xu.image
import org.bytedeco.javacpp.Loader
import org.bytedeco.opencv.global.opencv_core
import org.bytedeco.opencv.global.opencv_highgui
import org.bytedeco.opencv.global.opencv_imgcodecs
import org.bytedeco.opencv.global.opencv_imgproc
import org.bytedeco.opencv.opencv_core.Mat
import org.bytedeco.opencv.opencv_core.Point
import org.bytedeco.opencv.opencv_core.Point2f
import org.bytedeco.opencv.opencv_core.Scalar
import org.bytedeco.opencv.opencv_core.Size
import org.bytedeco.opencv.opencv_imgproc.Vec4fVector
object Circles {
init {
Loader.load(opencv_core::class.java)
}
@JvmStatic
fun main(args: Array<String>) {
roi()
}
/** ROI */
private fun roi() {
// 读取图像
val src = opencv_imgcodecs.imread("C:\\Users\\xuyq\\Desktop\\2.png")
if (src == null || src.empty()) {
return
}
val dst = Mat()
opencv_imgproc.getRectSubPix(
src,
Size(100, 100), // 裁剪大小
Point2f((src.rows() / 2.0).toFloat(), (src.cols() / 2.0).toFloat()), // 裁剪图片中心
dst
)
// 显示ROI
opencv_highgui.imshow("src", src)
opencv_highgui.imshow("dst", dst)
opencv_highgui.waitKey(0)
}
/** 圆形检测 */
private fun circles() {
// 读取图像
val src = opencv_imgcodecs.imread("C:\\Users\\hyacinth\\Desktop\\2.png")
if (src == null || src.empty()) {
return
}
// 中值模糊(滤波-->平滑)
val img = Mat()
opencv_imgproc.medianBlur(src, img, 1)
// 图片转灰色
val gray = Mat()
opencv_imgproc.cvtColor(img, gray, opencv_imgproc.COLOR_BGR2GRAY)
// 霍夫变换-圆形检测
val point = Vec4fVector()
opencv_imgproc.HoughCircles(
gray.getPointer(),
point,
opencv_imgproc.HOUGH_GRADIENT,
1.0,
20.0,
50.0,
30.0,
20,
40
)
println(point.get().size)
// 遍历每个圆并绘制到图像上
for (i in 0 until point.size()) {
val circle = point[i]
val x = circle[0].toInt() // 圆心 x 坐标
val y = circle[1].toInt() // 圆心 y 坐标
val radius = circle[2].toInt() // 半径
// 绘制圆心
opencv_imgproc.circle(
src,
Point(x, y),
5,
Scalar(0.0, 255.0, 0.0, 0.0), // 绿色圆心
-1, // 填充
opencv_imgproc.LINE_AA,
0
)
// 绘制圆周
opencv_imgproc.circle(
src,
Point(x, y),
radius,
Scalar(255.0, 0.0, 0.0, 0.0), // 红色圆周
2, // 边框宽度
opencv_imgproc.LINE_AA,
0
)
}
// 显示结果
opencv_highgui.imshow("Detected Circles", src)
opencv_highgui.waitKey(0)
}
}3 测试结果
