java - 使用 ImageJ 调整和裁剪图像

Question

我正在尝试使用 ImageJ 调整图像大小和裁剪图像。这是代码:

ImagePlus ip1 = IJ.openImage("_Pic.jpg");
ImagePlus ip2 = IJ.openImage("_Pic.jpg");

ImageProcessor imgP1 = ip1.getProcessor();
ImageProcessor imgP2 = ip2.getProcessor();

FileSaver fs1 = new FileSaver(ip1);
FileSaver fs2 = new FileSaver(ip2);

/* Trying to resize */
imgP1.resize(100); // also tried with width and height
fs1.saveAsJpeg("Resized.jpg");

/* Trying to crop */
imgP2.setRoi(100, 100, 200, 200);
imgP2.crop();
fs2.saveAsJpeg("Cropped.jpg");

不幸的是，新创建的文件与原始文件相同。

到目前为止，我已经找到了如何模糊、平滑、反转、平移、旋转……，但这两个让我很难过。有人有想法吗？

Answer 1

你的 cross-posted question to the ImageJ forum Stefan Helfrich 在那里回答:

If you take a look at the Javadocs for ImageProcessor you'll see that resize() as well as crop() return new ImageProcessor instances and do not operate on this. That's why you'll have to use the ImagePlus.setProcessor(ImageProcessor) method to add the returned ImageProcessors to ip1 and ip2.

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