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.