publicbyte[] process(BufferedImage image,intdpi)throwsMalformedURLException, IOException { for(Iterator<ImageWriter> iw = ImageIO.getImageWritersByFormatName("png"); iw.hasNext();) { ImageWriter writer = iw.next(); ImageWriteParam writeParam = writer.getDefaultWriteParam(); ImageTypeSpecifier type...
首先,我们可以定义一个方法getDpiFromImage,该方法接收图片文件路径作为参数,并返回图片的DPI信息。 importcom.drew.imaging.ImageMetadataReader;importcom.drew.metadata.Metadata;importcom.drew.metadata.exif.ExifIFD0Directory;importjava.io.File;importjava.io.IOException;publicclassImageDpiUtils{publicstaticdoubleget...
}//读取tiff文件到 BufferedImageprivatestaticBufferedImageloadtiff(File tifFile,long[] dpiData){ImageReaderreader=null;FileImageInputStreamfis=null;BufferedImageres=null;try{ Object[] src = readtiff(tifFile);if(src ==null) {returnnull; } reader = (ImageReader) src[0]; fis = (FileImageInputS...
4. 设置 DPI 现在,我们需要设置修改后图片的 DPI。以下是代码示例: IIOMetadatametadata=writer.getDefaultImageMetadata(ImageTypeSpecifier.createFromBufferedImageType(type),null);Elementtree=(Element)metadata.getAsTree("javax_imageio_jpeg_image_1.0");Elementjfif=(Element)tree.getElementsByTagName("app0JFIF"...
当有流量经过时基于DPI的监控系统后，系统需要读取报文中OSI七层协议中应用层的信息进行分析并根据策略...
handleDpi(file,DPI,DPI); } /** * 改变图片DPI * @param file * @param xDensity 水平分辨率 * @param yDensity 垂直分辨率 */ publicstaticvoidhandleDpi(Filefile,intxDensity,intyDensity) { FileOutputStreamfileOutputStream=null; try { BufferedImageimage=ImageIO.read(file); ...
⽤javaimageio调整图⽚DPI，例如从96调整为300因项⽬需求把图⽚的DPI值提升到300，否则OCR识别产⽣错乱：直接上源码：1、图⽚处理接⼝：package util.image.dpi;import java.awt.image.BufferedImage;import java.io.IOException;/** * 图⽚处理接⼝设计 * @author jffan * */ public interface...
8032667 client-libs java.awt [macosx] Components cannot be rendered in HiDPI to BufferedImage 8032788 client-libs java.awt ImageIcon constructor throws an NPE and hangs when passed a null String parameter 8032961 client-libs java.awt A JTextField of an applet loses the abillity to receive the ...
8032667 client-libs java.awt [macosx] Components cannot be rendered in HiDPI to BufferedImage 8032788 client-libs java.awt ImageIcon constructor throws an NPE and hangs when passed a null String parameter 8032961 client-libs java.awt A JTextField of an applet loses the abillity to receive the ...
if (metadata.isReadOnly() || !metadata.isStandardMetadataFormatSupported()) { continue; } setDPI(metadata); final ImageOutputStream stream = ImageIO.createImageOutputStream(output); try { writer.setOutput(stream); writer.write(metadata, new IIOImage(gridImage, null, metadata), writeParam); ...