Provides functions to analyze / operate JPEG file in C#.
- No dependencies
- Works on WindowsPhone 8/8.1
- For UWP (Windows 10), See new one
- The latest Visual Studio Express 2012 is required to run included tests.
JpegMetaDataParser parses metadata in JPEG image file simply. Both of byte array and byte stream are supported as input format. JpegMetaData structure may contains 3 sections(called IFD), Primary, Exif, and GPS. Each IFD has a dictionary of Entry with keys.
var Metadata = JpegMetaDataParser.ParseImage(image);JpegMetaDataProcessor#SetMetaData function overwrites metadata to given image.
var metadata = JpegMetaDataParser.ParseImage(image);
// do something to the metadata
var newImage = JpegMetaDataProcessor.SetMetaData(image, metadata);It has a method to add GPS IFD from Geoposition(Windows.Devices.Geolocation.Geoposition).
// parse given image first
var exif = JpegMetaDataParser.ParseImage(image);
// check whether the image already contains GPS section or not
if (exif.PrimaryIfd.Entries.ContainsKey(Definitions.GPS_IFD_POINTER_TAG))
{
// You can throw excpetion
throw new GpsInformationAlreadyExistsException("This image contains GPS information.");
}
// or overwrite section.
// Create IFD structure from given GPS info
var gpsIfdData = GpsIfdDataCreator.CreateGpsIfdData(position);
// Add GPS info to exif structure
exif.GpsIfd = gpsIfdData;
// create a new image with given location info
var newImage = JpegMetaDataProcessor.SetMetaData(image, exif);A class, HistogramCreator supports to show level of each colors.
private void SomethingInitialize()
{
// Initialize instance with resolution setting
histogramCreator = new HistogramCreator(HistogramCreator.HistogramResolution.Resolution_128);
histogramCreator.OnHistogramCreated += histogramCreator_OnHistogramCreated;
}
public void ImageUpdated()
{
// input image
await histogramCreator.CreateHistogram(ImageSource);
}
void histogramCreator_OnHistogramCreated(int[] Count_R, int[] Count_G, int[] Count_B)
{
// Do something with values.
// Length of these arrays will be same, and it will be the resolution, 64, 128 or 256.
// Pixel count of each levels are stored.
}