How to add file comments to a .JP2 image

#1 Posted : Thursday, June 1, 2017 4:10:26 PM(UTC)

Nick Villalobos

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Posts: 119

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Several formats allow you to store non-image data such as comments, tags, and markers. You can manipulate the comments of an image by adding/removing RasterCommentMetadata objects to this collection. By setting the CodecsSaveOptions.Comments property to true before calling RasterCodecs.Save, you can save the comments in this collection when the image is saved into a file.

Below is the code that you would need to add file metadata comments to a .JP2 image.

Code:


RasterCodecs codecs = new RasterCodecs();
RasterImage image = codecs.Load(input);

RasterCommentMetadata jp2comment = new RasterCommentMetadata();

// set the comment 
jp2comment.Type = RasterCommentMetadataType.Jpeg2000Latin;
jp2comment.FromAscii("This is a test string to load metadata to a JP2 image");
image.Comments.Add(jp2comment);

codecs.Options.Save.Comments = true;
codecs.Save(image, dest, RasterImageFormat.Jp2, 0);

// load the comment together with the image 
RasterCommentMetadata comment = codecs.ReadComment(dest, 1, RasterCommentMetadataType.Jpeg2000Latin);

Console.WriteLine("Comment of type " + comment.Type.ToString() + " = " + comment.ToAscii());

Here is a screenshot of the outcome from the code above:
UserPostedImage

Nick Villalobos
Developer Support Engineer
LEAD Technologies, Inc.

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How to add file comments to a .JP2 image