public SobelAnalyzer(BitmapData bitmap, int sobelThreshold, float bucketTreshold)
{
var thumbnail = GetThumbnail(bitmap);
var thumbnailData = thumbnail.LockBits(new Rectangle(0, 0, thumbnail.Width, thumbnail.Height), ImageLockMode.ReadOnly, thumbnail.PixelFormat);
var thumbnailInspection = new BorderInspector(thumbnailData, _thumbnailSize, 1.0f);
thumbnail.UnlockBits(thumbnailData);
var features = GetFeatureMap(thumbnail);
var featureBox = new Rectangle(0, 0, features.Width, features.Height);
var featureData = features.LockBits(featureBox, ImageLockMode.ReadOnly, features.PixelFormat);
var featureInspection = new BorderInspector(featureData, sobelThreshold, bucketTreshold, forceRgb: true);
if (featureInspection.Failed)
{
featureBox = featureBox.Contract(10);
var additionalInspection = new BorderInspector(featureData, featureBox, sobelThreshold, bucketTreshold);
if (!additionalInspection.Failed)
{
featureInspection = additionalInspection;
}
}
if (featureInspection.Failed)
{
_boundingBox = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
_foundBoundingBox = false;
}
else
{
_boundingBox = GetBoundingBoxForFeature(featureData, featureInspection.Rectangle, sobelThreshold, bitmap.Width, bitmap.Height);
_foundBoundingBox = true;
}
features.UnlockBits(featureData);
features.Dispose();
thumbnail.Dispose();
_analysis = new CropAnalysis
{
Success = _foundBoundingBox,
BoundingBox = _boundingBox,
Background = thumbnailInspection.BackgroundColor,
};
}
public BoundsAnalyzer(BitmapData bitmap, int colorThreshold, float bucketTreshold)
{
var outerBox = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
var imageBox = outerBox;
var borderInspection = new BorderInspector(bitmap, imageBox, colorThreshold, bucketTreshold);
if (borderInspection.Failed)
{
colorThreshold = (int)Math.Round(colorThreshold * 0.5);
bucketTreshold = 1.0f;
imageBox = imageBox.Contract(10);
var additionalInspection = new BorderInspector(bitmap, imageBox, colorThreshold, bucketTreshold);
if (!additionalInspection.Failed)
{
borderInspection = additionalInspection;
}
}
if (borderInspection.Failed)
{
_boundingBox = outerBox;
_foundBoundingBox = false;
}
else
{
if (borderInspection.BytesPerPixel == 3)
{
_boundingBox = GetBoundingBoxForContentRgb(bitmap, borderInspection.Rectangle, borderInspection.BackgroundColor, colorThreshold);
}
else
{
_boundingBox = GetBoundingBoxForContentArgb(bitmap, borderInspection.Rectangle, borderInspection.BackgroundColor, colorThreshold);
}
_foundBoundingBox = ValidateRectangle(_boundingBox);
}
_cropAnalysis = new CropAnalysis
{
Background = borderInspection.BackgroundColor,
BoundingBox = _boundingBox,
Success = _foundBoundingBox
};
}
