The Exif standard defines the following data types for comments. Usage is dependent of your development platform. To see the usage, refer to the code example for your platform.
Data type | Description |
---|---|
UNDEFINED |
The data type is determined by the field. |
SHORT |
Integer |
LONG |
Long integer |
ASCII |
Character string |
BYTE |
Array of bytes |
RATIONAL |
An array of two unsigned long integers that express a fraction. The first value is the numerator, and the second is the denominator. |
SRATIONAL |
An array of two signed long integers that express a fraction. The first value is the numerator, and the second is the denominator. |
The byte length of a comment is based on the data type. For example, an SRATIONAL with a length of 3 is an array of 6 long integers.
When a comment that requires an array is set, the array can be zero-based (where the first element has an index of 0) or one-based (where the first element has an index of 1). When you get a comment that is an array, it will always be zero-based.
For more information about Exif file comments, refer to:
For more information and sample code, refer to:
Raster .NET | C API | C++ Class Library | JavaScript HTML5
Document .NET | C API | C++ Class Library | JavaScript HTML5
Medical .NET | C API | C++ Class Library | JavaScript HTML5
Medical Web Viewer .NET
Your email has been sent to support! Someone should be in touch! If your matter is urgent please come back into chat.
Chat Hours:
Monday - Friday, 8:30am to 6pm ET
Thank you for your feedback!
Please fill out the form again to start a new chat.
All agents are currently offline.
Chat Hours:
Monday - Friday
8:30AM - 6PM EST
To contact us please fill out this form and we will contact you via email.