我已經(jīng)將Picasa的面部數(shù)據(jù)保存在JPEG文件中(在XMP中),現(xiàn)在我試圖用Java讀取該信息.到目前為止,我失敗了,將不勝感激.

我正在嘗試使用metadata-extractor庫(kù)(盡管任何其他解決方案也可以).我可以閱讀基本信息(例如日期,圖像尺寸等),但是我在提取其他數(shù)據(jù)時(shí)迷失了方向.這是到目前為止我得到的：

File file -- this is my JPEG file

Metadata metadata = JpegMetadataReader.readMetadata(file);

XmpDirectory xmpDirectory = metadata.getDirectory(XmpDirectory.class);

XMPMeta xmpMeta = xmpDirectory.getXMPMeta();

System.out.println(xmpMeta.dumpObject());

結(jié)果：

ROOT NODE

http://www.metadataworkinggroup.com/schemas/regions/ = "mwg-rs:" (0x80000000 : SCHEMA_NODE)

mwg-rs:Regions (0x100 : STRUCT)

mwg-rs:AppliedToDimensions (0x100 : STRUCT)

stDim:h = "2793"

stDim:unit = "pixel"

stDim:w = "2047"

mwg-rs:RegionList (0x200 : ARRAY)

[1] (0x100 : STRUCT)

mwg-rs:Area (0x100 : STRUCT)

stArea:h = "0.69531"

stArea:unit = "normalized"

stArea:w = "0.790425"

stArea:x = "0.491451"

stArea:y = "0.41783"

mwg-rs:Name = "abcde"

mwg-rs:Type = "Face"

http://ns.adobe.com/xap/1.0/ = "xmp:" (0x80000000 : SCHEMA_NODE)

xmp:ModifyDate = "2014-04-06T19:43:24+01:00"

我不明白如何到達(dá)這些stArea：w,mwg-rs：Type =“ Face”等.

解決方法:

像往常一樣,在發(fā)布后立即有found a solution.我將在下面列出以將其放在此處.

try {

Metadata metadata = ImageMetadataReader.readMetadata(imageFile);

XmpDirectory xmpDirectory = metadata.getDirectory(XmpDirectory.class);

XMPMeta xmpMeta = xmpDirectory.getXMPMeta();

XMPIterator itr = xmpMeta.iterator();

while (itr.hasNext()) {

XMPPropertyInfo pi = (XMPPropertyInfo) itr.next();

if (pi != null && pi.getPath() != null) {

if ((pi.getPath().endsWith("stArea:w")) || (pi.getPath().endsWith("mwg-rs:Name")) || (pi.getPath().endsWith("stArea:h")))

System.out.println(pi.getValue().toString());

}

}

} catch (final NullPointerException npe) {

// ignore

}

我在這里不喜歡的是,它遍歷所有屬性,而不僅僅是讀取必需的屬性.有更好(更快)的解決方案嗎？

標(biāo)簽：picasa,xmp,metadata-extractor,java

來源： https://codeday.me/bug/20191121/2054131.html

總結(jié)

以上是生活随笔為你收集整理的Java中xmp标签的作用_如何在Java中从JPEG读取XMP面部数据的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。