write IPTC data into an image without losing XMP,EXIF data

im trying to insert IPTC data into an image. i used following code for this.

var bitmap = new Aurigma.GraphicsMill.Bitmap(imgpath); //input image and output image paths are same(i.e,same image)
var settings = new Aurigma.GraphicsMill.Codecs.JpegSettings();
var iptc = new Aurigma.GraphicsMill.Codecs.IptcDictionary();
string keyWords = "string1" + "," + "string1";
iptc[Aurigma.GraphicsMill.Codecs.IptcDictionary.Keyword] = keyWords;
settings.Iptc = iptc;
bitmap.Save(imgpath, settings);  //input image and output image paths are same(i.e,same image)

with this code we are losing EXIF,XMP data and image size also decreasing.

i found following link which tells how to preserve data while editing metadata of an image,but the link uses two images i.e reading data from one image and copying image into other location with the changes.we don't want to do that.

http://www.graphicsmill....le-processing-images.htm

my requirement is to write iptc data into an image without losing EXIF,XMP data.

please suggest how can we achieve this.

Thank you.

Edited by moderator Thursday, September 25, 2014 1:02:59 AM(UTC)  | Reason: Not specified

Thanks a TON.

The code is working very fine with a small defect.still the image size is reducing .

please check the code.

          string sourcePath = @"E:\Images\Arnez_Jennifer_120144.jpg";//at this point image size is 60 kb

            using (var losslessJpeg = new Aurigma.GraphicsMill.Codecs.LosslessJpeg(sourcePath))
            {
                // IPTC
                if (losslessJpeg.Iptc == null)
                {
                    losslessJpeg.Iptc = new Aurigma.GraphicsMill.Codecs.IptcDictionary();
                }
                losslessJpeg.Iptc[Aurigma.GraphicsMill.Codecs.IptcDictionary.Caption] = "Mountain";
                losslessJpeg.Iptc[Aurigma.GraphicsMill.Codecs.IptcDictionary.Caption] = "Mohan;Krishna";

                // EXIF
                if (losslessJpeg.Exif == null)
                {
                    losslessJpeg.Exif = new Aurigma.GraphicsMill.Codecs.ExifDictionary();
                }
                losslessJpeg.Exif[Aurigma.GraphicsMill.Codecs.ExifDictionary.Software] = "Aurigma Graphics Mill";

                // XMP
                var xmp = new Aurigma.GraphicsMill.Codecs.XmpData();
                if (losslessJpeg.Xmp != null)
                {
                    xmp.Load(losslessJpeg.Xmp);
                }
                losslessJpeg.Xmp = xmp.Save();

                losslessJpeg.Write(@"E:\Images\Arnez_Jennifer_120144_1.jpg");//after wrting it is reduced to 47.3 kb
            }

            System.IO.File.Delete(sourcePath);  
            System.IO.File.Move(@"E:\Images\Arnez_Jennifer_120144_1.jpg", sourcePath);

Edited by moderator Thursday, September 25, 2014 3:35:08 AM(UTC)  | Reason: Not specified

File Attachment(s):

Test.rar (37kb) downloaded 10 time(s).

We have figured out the reason of reducing file size. Graphics Mill recompressed the thumbnail as well as lost some vendor specific EXIF tags.

The problems are fixed now. The update will be available on NuGet next week

Edited by user Monday, September 29, 2014 7:34:29 PM(UTC)  | Reason: Not specified

Sorry to bother you again.

we still didn't get any update through Nuget.

one more thing i want to ask you,we have 7.6.1 key with us ,is it a problem if we use the Dll that we will get through Nuget???

Please try to download and install Microsoft Visual C++ Redistributable Package:

http://www.graphicsmill.com/doc...on-notices.htm#MVPackage

It seems you need the x86 version.

BTW, which version of Visual Studio do you use?

Please download and install the Graphics Mill redistributable package to make sure that you have installed the correct VC++ runtime:

https://www.graphicsmill.com/Dow...sMillRedistributable.exe

Please let me know whether it helps.

Edited by user Tuesday, October 28, 2014 2:31:19 AM(UTC)  | Reason: Not specified

We have checked the problem and it seems the image size is increased a bit.

We have explored the saved JPEG files to make sure that Graphics Mill preserves the EXIF and XML metadata as well as it doesn't recompress the image and its embedded thumbnail. Our tests show that the library works as expected. Even though we discovered that Graphics Mill saves the XML content of the XMP metadata with extra white spaces and it causes the increase of the size.

We will fix it in the further releases, however I hope that this issue is not critical.