Change in image properties after performing EXIF operation

[sumedhvidhate]

ImageMagick version

13.4.0

Operating system

Windows

Operating system, version and so on

Windows 11, Magick.NET.Core

Description

When performing EXIF operation on the image, image properties are getting changed. On carrying out pixel by pixel comparison there was around 50% pixels changed.

Steps to Reproduce

The code I'm using is as follows

        XmpMetaFactory.SchemaRegistry.RegisterNamespace("http://www.pix4d.com", "Camera");

        try
        {
            using (MagickImage image = new MagickImage(_imagePath))
            {

                #region Add EXIF metadata

                IExifProfile exifProfile = image.GetExifProfile();
                if (exifProfile == null)
                {
                    exifProfile = new ExifProfile();
                }

                exifProfile.SetValue(ExifTag.GPSLatitudeRef, _latitude >= 0 ? "N" : "S"); // select between northern (N) / southern (S) hemisphere
                var data = ConvertToRationalDMS(Math.Abs(_latitude));
                exifProfile.SetValue(ExifTag.GPSLatitude, data);

                data = ConvertToRationalDMS(Math.Abs(_longitude));
                exifProfile.SetValue(ExifTag.GPSLongitudeRef, _longitude >= 0 ? "E" : "W"); // select between eastern (E) / western (W) hemisphere
                exifProfile.SetValue(ExifTag.GPSLongitude, data);

                exifProfile.SetValue(ExifTag.GPSAltitudeRef, _altitude >= 0 ? (byte)0 : (byte)1); // select between above (0) / below (1)  sea-level
                exifProfile.SetValue(ExifTag.GPSAltitude, new Rational(Math.Abs(_altitude)));

                image.SetProfile(exifProfile);

                #endregion

                #region Add XMP metadata

                IXmpProfile xmpProfile1 = image.GetXmpProfile();

                Console.WriteLine();

                IXmpMeta xmpData = XmpMetaFactory.Create();

                xmpData.SetProperty("http://www.pix4d.com", "GPSXAccuracy", $"{_gpsXAccuracy:0.0000000000}");
                xmpData.SetProperty("http://www.pix4d.com", "GPSYAccuracy", $"{_gpsYAccuracy:0.0000000000}");
                xmpData.SetProperty("http://www.pix4d.com", "GPSZAccuracy", $"{_gpsZAccuracy:0.0000000000}");
                xmpData.SetProperty("http://www.pix4d.com", "GPSXYAccuracy", $"{_gpsXYAccuracy:0.0000000000}");
                xmpData.SetProperty("http://www.pix4d.com", "RINEXTimestamp", $"{_eventTime:yyyyMMdd_HHmmss.fff}");

                string serializedData = XmpMetaFactory.SerializeToString(xmpData, new XmpCore.Options.SerializeOptions());
                IXmpProfile xmpProfile = new XmpProfile(System.Text.Encoding.UTF8.GetBytes(serializedData));

                image.SetProfile(xmpProfile);

                #endregion
                image.Interlace = Interlace.NoInterlace;
                image.Quality = 100;
                image.Settings.Compression = CompressionMethod.NoCompression;
                var optimizer = new ImageOptimizer();
                optimizer.LosslessCompress(_imagePath);

                image.Write(_newImagePath);
            }
        }
        catch (Exception exp)
        {
        }

    }

Images

No response

[snibgo]

You don't show your input and output images, so we can only guess.

I guess your output format is lossy, eg jpeg compression.

[sumedhvidhate]

You don't show your input and output images, so we can only guess.

I guess your output format is lossy, eg jpeg compression.

Here i'm attaching the images in the drive link below
https://drive.google.com/drive/folders/1ggSsa2eM1IS-fDxVTuHK8P5P6_i3XCnB?usp=drive_link

We are using this images for photogrammetry purpose and ortho-mosaic generation.
There is significant change in the size too