java - 使用 imageJ 库扫描 .tiff 图像的像素

Question

我正在使用 imageJ 库读取 .tiff 图像文件。但是当我尝试读取变量 c 中 image1 的像素时，我收到一条错误消息“不兼容的类型:需要 int，找到 int[]。我对java很陌生，所以有人可以告诉我如何解决这个问题。该代码在其他图像格式上运行良好。

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import javax.imageio.ImageIO;
import ij.ImagePlus;

public class GetPixelCoordinates {

//int y, x, tofind, col;
/**
 * @param args the command line arguments
 * @throws IOException  
 */
    public static void main(String args[]) throws IOException {
        try {
            //read image file

            ImagePlus img = new ImagePlus("E:\\abc.tiff");

            //write file
            FileWriter fstream = new FileWriter("E:\\log.txt");
            BufferedWriter out = new BufferedWriter(fstream);

            //find cyan pixels
            for (int y = 0; y < img.getHeight(); y++) {
                for (int x = 0; x < image.getWidth(); x++) {

                    int c = img.getPixel(x,y);
                    Color color = new Color(c);


                     if (color.getRed() < 30 && color.getGreen() >= 225 && color.getBlue() >= 225) {
                         out.write("CyanPixel found at=" + x + "," + y);
                         out.newLine();

                     }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Answer 1

如果你看documentation for getPixel(int,int) in ImagePlus您会看到它返回一个 int 数组，而不是单个 int:

Returns the pixel value at (x,y) as a 4 element array. Grayscale values are retuned in the first element. RGB values are returned in the first 3 elements. For indexed color images, the RGB values are returned in the first 3 three elements and the index (0-255) is returned in the last.

看起来您正在处理 RGB 图像，因此您应该能够执行以下操作:

int [] colorArray = image1.getPixel(x,y);

int redValue = colorArray[0];
int greenValue = colorArray[1];
int blueValue = colorArray[2];