public string GetLightnessPixelsAsync(IFormFile file, int lightness)
{
SKBitmap bitmap = SKBitmap.Decode(file.OpenReadStream());
for (int i = 0; i < bitmap.Width; ++i)
{
for (int j = 0; j < bitmap.Height; ++j)
{
var rlin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Red));
var glin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Green));
var blin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Blue));
var Y = PixelInfo.CalculateYLuminence(rlin, glin, blin);
var lum = PixelInfo.CalculatePerceivedLightness(Y);
if (lum > lightness)
{
bitmap.SetPixel(i, j, new SKColor(103, 235, 52));
}
}
}
var image = SKImage.FromBitmap(bitmap);
var imageStream = image.Encode().AsStream();
using (MemoryStream ms = new MemoryStream())
{
imageStream.CopyTo(ms);
var bytesArray = ms.ToArray();
return(Convert.ToBase64String(bytesArray));
}
}
public string SortPixelsAsync(IFormFile file)
{
SKBitmap bitmap = SKBitmap.Decode(file.OpenReadStream());
var pixels = new List <Pixel>();
for (int i = 0; i < bitmap.Width; ++i)
{
for (int j = 0; j < bitmap.Height; ++j)
{
var rlin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Red));
var glin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Green));
var blin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Blue));
var Y = PixelInfo.CalculateYLuminence(rlin, glin, blin);
pixels.Add(new Pixel()
{
Red = bitmap.GetPixel(i, j).Red,
Green = bitmap.GetPixel(i, j).Green,
Blue = bitmap.GetPixel(i, j).Blue,
Luminence = PixelInfo.CalculatePerceivedLightness(Y)
});
}
}
pixels.Sort();
int k = 0;
for (int i = 0; i < bitmap.Width; ++i)
{
for (int j = 0; j < bitmap.Height; ++j)
{
bitmap.SetPixel(i, j, new SKColor(pixels[k].Red, pixels[k].Green, pixels[k].Blue));
k++;
}
}
var image = SKImage.FromBitmap(bitmap);
var imageStream = image.Encode().AsStream();
using (MemoryStream ms = new MemoryStream())
{
imageStream.CopyTo(ms);
var bytesArray = ms.ToArray();
return(Convert.ToBase64String(bytesArray));
}
}
public string DrawLightRectangles(IFormFile file, ImagePrediction predictionResult, int lightness)
{
SKBitmap bitmap = SKBitmap.Decode(file.OpenReadStream());
foreach (var prediction in predictionResult.Predictions)
{
if (prediction.Probability > 0.2)
{
int x = (int)(prediction.BoundingBox.Left * bitmap.Width + 0.5);
int y = (int)(prediction.BoundingBox.Top * bitmap.Height + 0.5);
int width = (int)(prediction.BoundingBox.Width * bitmap.Width + 0.5);
int height = (int)(prediction.BoundingBox.Height * bitmap.Height + 0.5);
for (int i = x; i < x + width; ++i)
{
for (int j = y; j < y + height; ++j)
{
var rlin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Red));
var glin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Green));
var blin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Blue));
var Y = PixelInfo.CalculateYLuminence(rlin, glin, blin);
var lum = PixelInfo.CalculatePerceivedLightness(Y);
if (lum > lightness)
{
bitmap.SetPixel(i, j, new SKColor(103, 235, 52));
}
}
}
}
}
var image = SKImage.FromBitmap(bitmap);
var imageStream = image.Encode().AsStream();
using (MemoryStream ms = new MemoryStream())
{
imageStream.CopyTo(ms);
var bytesArray = ms.ToArray();
return(Convert.ToBase64String(bytesArray));
}
}
public async Task <IEnumerable <ImageModel> > Lightness(List <int> pointIds)
{
var list = new List <ImageModel>();
for (int k = 0; k < pointIds.Count; k++)
{
int count = 0;
var pixels = new List <Pixel>();
SKBitmap bitmap = SKBitmap.Decode(await _imageService.DownloadIMageFromStorageAsync(pointIds[k].ToString()));
Parallel.For(0, bitmap.Width, (i) =>
{
Parallel.For(0, bitmap.Height, (j) =>
{
var rlin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Red));
var glin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Green));
var blin = PixelInfo.ConvertToLinear(PixelInfo.ConvertToDecimal(bitmap.GetPixel(i, j).Blue));
var Y = PixelInfo.CalculateYLuminence(rlin, glin, blin);
var lum = PixelInfo.CalculatePerceivedLightness(Y);
if (lum > PixelInfo.LIGHTNESS)
{
count++;
}
});
});
var percents = ((double)count / (bitmap.Width * bitmap.Height)) * 100;
if (percents > 25)
{
list.Add(new ImageModel()
{
PointId = pointIds[k], IsLight = true
});
}
else
{
list.Add(new ImageModel()
{
PointId = pointIds[k], IsLight = false
});
}
}
return(list);
}