[Apache Sanselan] Retrieving Image Metadata using Sanselan

Apache Sanselan is a pure Java library for reading and Writing Image formats. It has recently graduated from Incubator and is now a proud member of Apache commons proper.

In this article we shall see how to get Image metadata using Apache Sanselan.

Let’s see how the code looks

Most of the work is done in single line ?

getMetadata() API returns the IImageMetadata details. The toString() method of actual instance class of IImageMetadata prints the image information in a formatted fashion. The instance depends upon the format of the image.

Running the program on one the images shipped with Sanselan source produced this output

--- Image Metadata ----
Exif metadata:
Root:
Image Description: '’'
Make: 'Oregon Scientific'
Model: 'DS6639'
Orientation: 1
XResolution: 72
YResolution: 72
Resolution Unit: 2
Software: 'Adobe Photoshop 7.0'
Modify Date: '2008:07:13 21:05:34'
YCbCr Positioning: 2
Exif Offset: 228

Exif:
Exposure Time: 10/10266 (0.001)
FNumber: 28/10 (2.8)
Exposure Program: 2
ISO: 55
Exif Version: 48, 50, 50, 48
Date Time Original: '2003:10:20 09:01:29'
Create Date: '2003:10:20 09:01:29'
Components Configuration: 1, 2, 3, 0
Compressed Bits Per Pixel: 2
Brightness Value: 9
Exposure Compensation: 0
Max Aperture Value: 3
Metering Mode: 1
Light Source: 0
Flash: 0
Focal Length: 864/100 (8.64)
Subject Location: 27556, 57533, 60147, 20319
Flashpix Version: 48, 49, 48, 48
Color Space: 1
Exif Image Width: 300
Exif Image Length: 225
File Source: 3
Scene Type: 1
Custom Rendered: 0
Exposure Mode: 0
White Balance: 1
Digital Zoom Ratio: 1
Focal Length In 3 5mm Format: 42
Scene Capture Type: 0
Gain Control: 0
Contrast: 0
Saturation: 0
Sharpness: 0

Sub: (jpegImageData)
Compression: 6
XResolution: 72
YResolution: 72
Resolution Unit: 2
Jpg From Raw Start: 838
Jpg From Raw Length: 6258

Photoshop (IPTC) metadata:
Caption/Abstract: ?

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