public void Generate_Image_Hash()
{
var imageFilename = @"C:\temp\image_tests\1.jpg";
var secondImagFilename = @"C:\temp\image_tests\2.jpg";
var resizedFirstImageFilename = @"C:\temp\image_tests\1-resized.jpg";
var thirdImageFilename = @"C:\temp\image_tests\3.jpg";
var hash = ImageHasher.AverageHash(imageFilename);
Assert.True(hash > 0);
var secondHash = ImageHasher.AverageHash(imageFilename);
Assert.True(secondHash > 0);
Assert.Equal(hash, secondHash);
secondHash = ImageHasher.AverageHash(secondImagFilename);
Assert.True(secondHash > 0);
Assert.Equal(hash, secondHash);
var similiar = ImageHasher.Similarity(imageFilename, secondImagFilename);
Assert.Equal(100d, similiar);
Assert.True(ImageHasher.ImagesAreSame(imageFilename, secondImagFilename));
secondHash = ImageHasher.AverageHash(resizedFirstImageFilename);
Assert.True(secondHash > 0);
Assert.Equal(hash, secondHash);
Assert.False(ImageHasher.ImagesAreSame(imageFilename, thirdImageFilename));
}
public static async Task <Image> GetImageFromUrlAsync(string url)
{
byte[] imageBytes = null;
try
{
using (var webClient = new WebClient())
{
webClient.Headers.Add("user-agent", WebHelper.UserAgent);
imageBytes = await webClient.DownloadDataTaskAsync(new Uri(url));
}
}
catch
{
}
if (imageBytes != null)
{
var signature = ImageHasher.AverageHash(imageBytes).ToString();
var ib = ImageHelper.ConvertToJpegFormat(imageBytes);
return(new Image
{
Url = url,
Status = Statuses.New,
Signature = signature,
Bytes = ib
});
}
return(null);
}
public string GenerateSignature()
{
if (this.Bytes == null || !this.Bytes.Any())
{
return(null);
}
return(ImageHasher.AverageHash(this.Bytes).ToString());
}
public static async Task <IImage> GetImageFromUrlAsync(string url)
{
byte[] imageBytes = null;
try
{
using (var webClient = new WebClient())
{
webClient.Headers.Add("user-agent", UserAgent);
imageBytes = await webClient.DownloadDataTaskAsync(new Uri(url));
}
}
catch
{
}
try
{
if (imageBytes != null)
{
var signature = ImageHasher.AverageHash(imageBytes).ToString();
var ib = ImageHelper.ConvertToJpegFormat(imageBytes);
return(new Image(Guid.NewGuid())
{
Url = url,
Status = Statuses.New,
Signature = signature,
Bytes = ib
});
}
}
catch (Exception ex)
{
Trace.WriteLine($"GetImageFromUrlAsync Url [{ url }], Exception [{ ex.ToString() }", "Warning");
}
return(null);
}