How can I read all metadata (EXIF and IPTC) from .jp2 images?

The image info function, imfinfo(), gives insufficient information. I know that exposure time is a part of the image metadata stored with my images and I need to be able to read it from each image file.

Answer 1

[Image Analyst]

I assume you mean "exposure time". If imfinfo() doesn't get it for you, then you might try this:

http://www.mathworks.com/matlabcentral/fileexchange/42000-run-exiftool

Another approach is to ask the photographer.

Answer 2

[thiirane]

So if Matlab is not supporting exifread() and imfinfo() does not support ExposureTime, how can this metadata be accessed?

Asking the photographer is not an option.

[Image Analyst]

If it's not there, then it's not there and it's unavailable. If I look at EXIF info in another program (ACDSee) I see several things related to exposure: Exposure program, Exposure Bias Value, and Shutter Speed, plus some other parameters that affect exposure like F-Number, ISO, etc. Windows seems to use different names: Exposure Time, Exposure Bias, and F-stop. Which one are you attempting to retrieve? And how do you know for a fact that it is there?