如何在java中调整tiff图像的大小?
我想调整.tiff文件的大小。我使用JAI工具包调整了不同类型图像的大小。以下是我尝试实施的内容:如何在java中调整tiff图像的大小?,java,image,jai,Java,Image,Jai,我想调整.tiff文件的大小。我使用JAI工具包调整了不同类型图像的大小。以下是我尝试实施的内容: int imageWidth = 330; int imageHeight = 490; BufferedImage tempImage = new BufferedImage(imageWidth, imageHeight,BufferedImage.TYPE_INT_RGB); Graphics2D graphics2D = tempImage
int imageWidth = 330;
int imageHeight = 490;
BufferedImage tempImage = new BufferedImage(imageWidth, imageHeight,BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = tempImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BICUBIC);
graphics2D.drawImage(tempImage, 0, 0, imageWidth, imageHeight, null);
graphics2D.dispose();
File outfile = new File("D:/Work/YoursGallery/output.tif");
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(outfile));
FileSeekableStream ss = new FileSeekableStream("D:/Work/YoursGallery/sample1.tif");
ImageDecoder dec = ImageCodec.createImageDecoder("tiff", ss, null);
TIFFEncodeParam param = new TIFFEncodeParam();
param.setTileSize(tempImage.getWidth(), tempImage.getHeight());
TIFFImageEncoder encoder = (TIFFImageEncoder) TIFFCodec.createImageEncoder("tiff", out, param);
encoder.encode(dec.decodeAsRenderedImage());
out.close();
创建的图像与原始图像的大小相同。谁能告诉我是什么问题吗
这是我用来测试它的示例tiff图像
提前感谢。这是因为您正在写tempImage,它仍然是原始图像
graphics2D.drawImage(image, 0, 0, imageWidth, imageHeight, null);
改为:
graphics2D.drawImage(tempImage, 0, 0, imageWidth, imageHeight, null);
或者将其他代码更改为写出image而不是tempImage
--编辑--
好的,尝试2。也许让来源和目的地相同是愚蠢的
BufferedImage bsrc = ImageIO.read(new File(src));
BufferedImage bdest =
new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bdest.createGraphics();
AffineTransform at =
AffineTransform.getScaleInstance((double)width/bsrc.getWidth(),
(double)height/bsrc.getHeight());
g.drawRenderedImage(bsrc,at);
试试看:)1)您正在将tempImage写入其内部:
graphics2D.drawImage(tempImage, 0, 0, imageWidth, imageHeight, null);
应该是:
graphics2D.drawImage(originalImage, 0, 0, imageWidth, imageHeight, null);
encoder.encode(tempImage);
2) 你正在写你刚刚读过的图像(顺便说一句,你为什么要读它?)
应该是:
graphics2D.drawImage(originalImage, 0, 0, imageWidth, imageHeight, null);
encoder.encode(tempImage);
根据建议进行更改,但仍然得到与原始图像具有相同尺寸的图像。抱歉,伙计,在我放弃之前,我还有一个建议:)它创建具有预期尺寸的图像,但整个图像为黑色。缺少或错误。图像现在没有预览。应用并测试了更改,但仍然得到黑色图像。