用 Java 读取 JPEG [英] Reading JPEGs in Java

问题描述

我正在尝试将 JPEG 转换为 BufferedImage 以显示在 JPanel 上.但是，javax.imageio.ImageIO.read() 似乎对它处理的 JPEG 非常挑剔，经常抛出 IIOException.几乎所有您想命名的图像阅读器都可以正常打开相同的 JPEG.

I'm attempting to get a JPEG into a BufferedImage to display on a JPanel . However, javax.imageio.ImageIO.read() seems to be very fussy about the JPEGs it processes, often throwing an IIOException. The same JPEGs open fine in pretty much any image reader you'd care to name.

我看过 Apache 的 Sanselan 和 JAI.但是 Sanselan 无法处理 JPEG，并且 JAI 不适用于 64 位 Windows 平台并且似乎没有得到维护(上次更新是在 2006 年).之前的 StackOverflow 上的答案 建议 com.sun.image.codec.jpeg.JPEGCodec，但这在 Java 5 中已被弃用，并在 7 中消失.

I've looked at Apache's Sanselan and JAI. But Sanselan can't process JPEGs and JAI isn't available for 64-bit Windows platforms and doesn't seem to be maintained (the last update was in 2006). A previous answer on StackOverflow suggested com.sun.image.codec.jpeg.JPEGCodec, but this was deprecated in Java 5 and has disappeared in 7.

这些是我唯一的选择吗?真的没有 Java 库能够稳健地将 JPEG 读取到 BufferedImage 中吗?

Are these my only options? Are there really no Java libraries capable of robustly reading JPEGs into a BufferedImage?

推荐答案

Legacy Toolkit 方法，例如 createImage 和 getImage 比 ImageIO 更宽松.

Legacy Toolkit methods such as createImage and getImage are known to be more lenient than ImageIO.

Werner Randelshofer 还写了一个 服务提供商使用 ImageIO 读取 CMYK JPEG.

Werner Randelshofer also wrote a Service Provider to read CMYK JPEGs with ImageIO.

通过结合这两种方法(尝试所有可能的ImageReader，然后回退到Toolkit)，您将能够处理合理数量的 JPEG 图像.

By combining both approaches (try every possible ImageReader and then fallback to Toolkit) you will be able to handle a reasonable number of JPEG Images.

使用 CMYK 配置文件读取 JPEG可能是一个有趣的阅读.

Reading JPEGs with CMYK profile may be a interesting read.

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