CODEWITHSUNDEEP
c#imageorientationmetadata
JKennedy
JKennedy

Reputation: 18799

Reset Image Orientation EXIF metadata flag

I am importing a picture into my application and rotating the image according to the EXIF metadata. After this I am saving the rotated image to my disk, but as I have still left the rotated image metadata on the image and windows thinks it should rotate it again... basically meaning my image ends up upside down.

So far I have got:

            using (Stream sourceStream = File.Open(dlg.FileName, FileMode.Open, FileAccess.Read))
            {
                BitmapDecoder sourceDecoder = BitmapDecoder.Create(sourceStream, createOptions, BitmapCacheOption.OnLoad);
                // Check source is has valid frames 
                if (sourceDecoder.Frames[0] != null && sourceDecoder.Frames[0].Metadata != null)
                {
                    sourceDecoder.Frames[0].Metadata.Freeze();
                    // Get a clone copy of the metadata
                    BitmapMetadata sourceMetadata = sourceDecoder.Frames[0].Metadata.Clone() as BitmapMetadata;
                    ImportedPhotoMetaData = sourceMetadata;
                }
            }

and

                using (var image = Image.FromFile(dlg.FileName))
                {
                    foreach (var prop in image.PropertyItems)
                    {
                        if (prop.Id == 0x112)
                        {
                            if (prop.Value[0] == 6)
                                rotate = 90;
                            if (prop.Value[0] == 8)
                                rotate = -90;
                            if (prop.Value[0] == 3)
                                rotate = 180;
                            prop.Value[0] = 1;
                        }
                    }
                }

but the prop.Value[0] = 1; line does not seem to reset the image metadata. I need to reset the image orientation on the ImportedPhotoMetaData property

Upvotes: 1

Views: 3073

Answers (1)

JKennedy
JKennedy

Reputation: 18799

Got it... Replace 

prop.Value[0] = 1;

with

ImportedPhotoMetaData.SetQuery("System.Photo.Orientation", 1);

Upvotes: 1

Related Questions