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## The JPEG 2000 Reader

The `J2KImageReader` class is used to read JPEG 2000 files or streams.

This class supports a number of query functions to find information about how the image was encoded with JPEG 2000, as well as some decode-time functions to control how the image will be decoded. Please consult the Reference Manual for details.

NOTE: The `J2KimageReader` class cannot be used to read “old-style” JPEG files.