When you use the constructor the whole image will be decoded. You should use the Ping method if you don't want to decode the whole image. But I am not sure if the exif profile will be read. I might be able to modify the reader if the exif profile is not read when you ping the image. When you Ping the image and you want to access the pixels you will need to Read the image from the start of the stream. Can you let me know if that works for you?
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