metadata-extractor | 易学教程

Extract IPTC-Keywords Longer than 64 Chars in Java

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问题 I'm using Drews Metadata Extractor for Java to extract IPTC-keywords from a JPEG Image. Works good so far. I assigned the keywords using Adobe Bridge. Unfortunately, Bridge supports keywords longer than 64 chars but the metadata extractor library only reads the first 64 chars of the String. Are there any ideas of how to read the whole keyword? (max. 128 chars) PS: It's not possible to shorten the Keywords. 回答1: If you have a sample image I can test this with, I'll give it a shot. You can open

Getting FileNotFoundException (Permission denied) when trying to read metadata from a picture

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问题 I am accessing pictures of the device's gallery via my app, when the picture is accessed the metadata of the picture will be read and stored in metadata . The problem I'm facing is that whenever the program tries to read the metadata I'm getting the following error java.io.FileNotFoundException: /storage/emulated/0/Snapchat/Snapchat-1185425082.jpg (Permission denied) . @Override protected void onActivityResult(int requestCode, int resultCode, Intent data){ super.onActivityResult(requestCode,

metadata-extractor class file unable to import in java class

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问题 I am using metadata-extractor to extract geo location from images but class file of metadata-extractor unable to recognise in java class, while all the classes are showing in maven lib. Maven dependency <dependency> <groupId>com.drewnoakes</groupId> <artifactId>metadata-extractor</artifactId> <version>2.11.0</version> </dependency> <dependency> <groupId>javaxt</groupId> <artifactId>javaxt-core</artifactId> <version>1.8.1</version> </dependency> Java import classes import com.drew.imaging

Unable to retrieve full text of title from JPEG metadata

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问题 This is closely related to Extract IPTC-Keywords Longer than 64 Chars in Java . Please see my comments there. The problem is that a title added to a JPEG file in Adobe Bridge as "Document Title" in the description tab (also shown as "Title" in the Details tab of the Windows File Properties dialog) ends up in two places in the JPEG file, as can be seen in a hex display of the file. One has the full title and one has only 64 characters' worth. I can get the truncated one (tag name "Object Name"

How do I obtain a hash of the payload of a digital photo container, ideally in Java?

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问题 I have edited EXIF properties on digital pictures, and would like to be able to identify them as identical. I believe this implies extracting the payload stream and computing a hash. What is the best way to do this, ideally in the Java language, most ideally in Java using a native implementation for performance. 回答1: JPEG files are a series of 'segments'. Some contain image data, others don't. Exif data is stored in the APP1 segment. You could write some code to compare the other segments,

How to read XMP face data from JPEG in Java

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问题 I have saved Picasa's face data inside my JPEG files (in XMP) and now I am trying to read that information in Java. So far I am failing and help would be much appreciated. I am trying to use metadata-extractor library (though any other solution would also be fine). I can read the basic information (like the date, the image size etc.), but I am lost at extracting the additional data. This is what I get so far: File file -- this is my JPEG file Metadata metadata = JpegMetadataReader

How do I obtain a hash of the payload of a digital photo container, ideally in Java?

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I have edited EXIF properties on digital pictures, and would like to be able to identify them as identical. I believe this implies extracting the payload stream and computing a hash. What is the best way to do this, ideally in the Java language, most ideally in Java using a native implementation for performance. JPEG files are a series of 'segments'. Some contain image data, others don't. Exif data is stored in the APP1 segment. You could write some code to compare the other segments, and see if they match. A hash seems like a reasonable approach here. For example, you might compare a hash of

How to read XMP face data from JPEG in Java

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I have saved Picasa's face data inside my JPEG files (in XMP) and now I am trying to read that information in Java. So far I am failing and help would be much appreciated. I am trying to use metadata-extractor library (though any other solution would also be fine). I can read the basic information (like the date, the image size etc.), but I am lost at extracting the additional data. This is what I get so far: File file -- this is my JPEG file Metadata metadata = JpegMetadataReader.readMetadata(file); XmpDirectory xmpDirectory = metadata.getDirectory(XmpDirectory.class); XMPMeta xmpMeta =