private static void ResizeImage(int width, int height, int quality, string options, IMagickImage magickImage)
{
magickImage.Quality = quality;
magickImage.Strip();
if (options.Contains("g")) //grayscale
{
magickImage.Grayscale(PixelIntensityMethod.Average);
}
if (width == magickImage.BaseWidth && height == magickImage.BaseHeight)
{
return;
}
else if (options.Contains("f") || options.Contains("t"))
{
magickImage.Resize(width, height);
}
else
{
var magickGeometry = new MagickGeometry(width, height)
{
IgnoreAspectRatio = false, //保持长宽比
FillArea = true
};
magickImage.Resize(magickGeometry);
magickImage.Crop(magickGeometry, Gravity.Center);
}
}
/// <summary>
/// Generate compress result from base64 image.
/// </summary>
/// <param name="base64Image"></param>
/// <returns></returns>
public CompressedImageModel CompressFromBase64(string base64Image)
{
MagickFormat format = MagickFormat.Jpeg;
IMagickImage image = MagickImage.FromBase64(base64Image);
MemoryStream compressedBuffer = new MemoryStream();
MemoryStream thumbnailBuffer = new MemoryStream();
image.Write(compressedBuffer, format);
image.Resize(ImageService.ThumbnailAspectSize, ImageService.ThumbnailAspectSize);
image.Write(thumbnailBuffer, format);
compressedBuffer.Seek(0, SeekOrigin.Begin);
thumbnailBuffer.Seek(0, SeekOrigin.Begin);
this.ImageOptimizer.LosslessCompress(compressedBuffer);
this.ImageOptimizer.LosslessCompress(thumbnailBuffer);
return(new CompressedImageModel(
compressedBuffer.GetBuffer(),
thumbnailBuffer.GetBuffer(),
ImageService.ImageFormat
));
}
private static void ResizeImage(int requestWidth, int requestHeight, int quality, string options, IMagickImage image)
{
image.Quality = quality;
image.Strip();
if (options.Contains("g")) //grayscale
{
image.Grayscale(PixelIntensityMethod.Average);
}
if (image.BaseWidth == requestWidth && image.BaseHeight == requestHeight) //requested image is same size
{
return;
}
if (requestWidth == 0 && requestHeight == 0) //requested image is same size
{
return;
}
if (options.Contains("f") || options.Contains("t")) //scale with aspect of image
{
var size = new MagickGeometry(requestWidth, requestHeight);
image.Resize(size);
}
else if (requestWidth == 0 || requestHeight == 0) //scale with aspect of image
{
var size = new MagickGeometry(requestWidth, requestHeight);
image.Resize(size);
}
else // This will resize the image to a fixed size without maintaining the aspect ratio.
{
var size = new MagickGeometry(requestWidth, requestHeight)
{
IgnoreAspectRatio = false, //keep aspect ratio!
FillArea = true
};
image.Resize(size);
image.Crop(size, Gravity.Center);
}
}
public override void ShowPreview(Renderer renderer)
{
if (NeedleImage != null)
{
var pixelMagnification = 8.0;
var magnification = Math.Min(1 / (double)pixelMagnification, 1.0);
var resizeAmount = new Percentage(magnification * 100);
IMagickImage newHaystack = null;
var haystack = this.state.Image(this.haystack);
lock (haystack) {
newHaystack = haystack.Clone();
newHaystack.Resize(resizeAmount);
};
var scaleFactor = newHaystack.Width / haystack.Width;
haystack = newHaystack;
if (this.initialCandidates != null)
{
foreach (var candidate in this.initialCandidates)
{
var rect = new Drawables()
.StrokeWidth(1)
.StrokeColor(new MagickColor("blue"))
.FillOpacity(new Percentage(0))
.Rectangle(candidate.X * scaleFactor, candidate.Y * scaleFactor, (candidate.X + NeedleSize) * scaleFactor, (candidate.Y + NeedleSize) * scaleFactor);
haystack.Draw(rect);
}
}
if (this.searchResult != null && this.searchResult.Distance < SearchResult.MAX_DISTANCE)
{
var joinPoint = this.searchResult.HaystackPoint;
var x = joinPoint.X;
var y = joinPoint.Y;
var rect = new Drawables()
.StrokeWidth(1)
.StrokeColor(searchResult.MeetsThreshold() ? new MagickColor("green") : new MagickColor("yellow"))
.FillOpacity(new Percentage(0))
.Rectangle(x * scaleFactor, y * scaleFactor, (x + NeedleSize) * scaleFactor, (y + NeedleSize) * scaleFactor);
haystack.Draw(rect);
}
var needle = NeedleImage.Clone();
needle.Resize(resizeAmount);
renderer.DisplayImages(haystack, needle);
}
}
public Stream Compare()
{
IMagickImage modifiedHigh = ReadPDF(_modifiedImagePath, _magickSettingsHigh);
IMagickImage original = ReadPDF(_originalImagePath, _magickSettings);
IMagickImage modified = ReadPDF(_modifiedImagePath, _magickSettings);
IMagickImage mask = GenerateMask(original, modified);
mask.Resize(new Percentage((double)Density / (double)ReducedDensity * 100d));
modifiedHigh.Composite(mask, Gravity.Center, CompositeOperator.Over);
MemoryStream ms = new MemoryStream();
modifiedHigh.Write(ms);
ms.Position = 0;
return(ms);
}
void DoMagic(ImageEditMode mode, IMagickImage image, int originalWidth, int originalHeight)
{
switch (mode)
{
case ImageEditMode.Swirl:
image.Swirl(360);
break;
case ImageEditMode.Rescale:
image.LiquidRescale(image.Width / 2, image.Height / 2);
image.LiquidRescale((image.Width * 3) / 2, (image.Height * 3) / 2);
image.Resize(originalWidth, originalHeight);
break;
case ImageEditMode.Wave:
image.BackgroundColor = MagickColor.FromRgb(0, 0, 0);
image.Wave(image.Interpolate, 10.0, 150.0);
break;
case ImageEditMode.Implode:
image.Implode(0.5d, PixelInterpolateMethod.Average);
break;
case ImageEditMode.JPEG:
image.Quality = 10;
break;
case ImageEditMode.MoreJPEG:
image.Quality = 5;
break;
case ImageEditMode.MostJPEG:
image.Quality = 1;
break;
default:
break;
}
}
private void Save(IMagickImage image, string device, string uploadPath, string identifier, MagickFormat format, int?size = null)
{
image.Format = format;
if (size != null)
{
image.Resize(new MagickGeometry()
{
Width = size.Value,
IgnoreAspectRatio = false
});
}
string path = Path.Combine(uploadPath, String.Format("{0}-{1}.{2}", identifier, device, format.ToString()));
image.Write(path);
if (format == MagickFormat.Jpg)
{
Compress(path);
}
}
private void DrawTreeCluster(MagickImage overlay, DrawableFixture fixture)
{
//MainForm.Log(string.Format("Image: {0} ({1}) ...", fixture.Name, fixture.TreeCluster.Tree), MainForm.LogLevel.notice);
string fileName = System.IO.Path.GetFileNameWithoutExtension(fixture.TreeCluster.Tree);
string defaultTree = "elm1";
// Load model image
if (!m_modelImages.ContainsKey(fileName))
{
string treeImageFile = string.Format("{0}\\data\\prerendered\\trees\\{1}.png", System.Windows.Forms.Application.StartupPath, fileName);
if (System.IO.File.Exists(treeImageFile))
{
MagickImage modelImage = new MagickImage(treeImageFile);
modelImage.Blur();
m_modelImages.Add(fileName, modelImage);
}
else
{
MainForm.Log(string.Format("Can not find image for tree {0} ({1}), using default tree", fixture.TreeCluster.Tree, fixture.NifName), MainForm.LogLevel.warning);
m_modelImages.Add(fileName, m_modelImages[defaultTree]);
}
}
if (m_modelImages.ContainsKey(fileName) && m_modelImages[fileName] != null)
{
// Get the width of the orginal tree shape
NifRow tree = FixturesLoader.NifRows.Where(n => n.Filename.ToLower() == fixture.TreeCluster.Tree.ToLower()).FirstOrDefault();
if (tree == null)
{
return;
}
System.Drawing.SizeF treeSize = tree.GetSize(0, 0);
int dimensions = ((fixture.CanvasWidth > fixture.CanvasHeight) ? fixture.CanvasWidth : fixture.CanvasHeight) + 10;
int extendedWidth = dimensions - fixture.CanvasWidth;
int extendedHeight = dimensions - fixture.CanvasHeight;
using (MagickImage treeCluster = new MagickImage(MagickColors.Transparent, dimensions, dimensions))
{
double centerX = treeCluster.Width / 2d;
double centerY = treeCluster.Height / 2d;
foreach (SharpDX.Vector3 treeInstance in fixture.TreeCluster.TreeInstances)
{
using (IMagickImage treeImage = m_modelImages[fileName].Clone())
{
double scaleWidthToTreeImage = treeSize.Width / treeImage.Width;
double scaleHeightToTreeImage = treeSize.Height / treeImage.Height;
int width = Convert.ToInt32(treeImage.Width * scaleWidthToTreeImage * fixture.Scale);
int height = Convert.ToInt32(treeImage.Height * scaleHeightToTreeImage * fixture.Scale);
treeImage.Resize(width, height);
int x = Convert.ToInt32(centerX - width / 2d - zoneConfiguration.ZoneCoordinateToMapCoordinate(treeInstance.X) * (fixture.FixtureRow.Scale / 100));
int y = Convert.ToInt32(centerY - height / 2d - zoneConfiguration.ZoneCoordinateToMapCoordinate(treeInstance.Y) * (fixture.FixtureRow.Scale / 100));
treeCluster.Composite(treeImage, x, y, CompositeOperator.SrcOver);
}
}
treeCluster.Rotate((360d * fixture.FixtureRow.AxisZ3D - fixture.FixtureRow.A) * -1);
using (MagickImage modelCanvas = new MagickImage(MagickColors.Transparent, fixture.CanvasWidth, fixture.CanvasHeight))
{
foreach (DrawableElement drawableElement in fixture.DrawableElements)
{
modelCanvas.Settings.FillColor = new MagickColor(
Convert.ToUInt16(128 * 256 * drawableElement.lightning),
Convert.ToUInt16(128 * 256 * drawableElement.lightning),
Convert.ToUInt16(128 * 256 * drawableElement.lightning)
);
DrawablePolygon polyDraw = new DrawablePolygon(drawableElement.coordinates);
modelCanvas.Draw(polyDraw);
}
modelCanvas.Composite(treeCluster, Gravity.Center, CompositeOperator.DstIn);
treeCluster.Composite(modelCanvas, Gravity.Center, CompositeOperator.Overlay);
//treeCluster.Composite(modelCanvas, Gravity.Center, CompositeOperator.SrcOver);
}
if (fixture.RendererConf.HasShadow)
{
CastShadow(
treeCluster,
fixture.RendererConf.ShadowOffsetX,
fixture.RendererConf.ShadowOffsetY,
fixture.RendererConf.ShadowSize,
new Percentage(100 - fixture.RendererConf.ShadowTransparency),
fixture.RendererConf.ShadowColor,
false
);
}
if (fixture.RendererConf.Transparency != 0)
{
treeCluster.Alpha(AlphaOption.Set);
double divideValue = 100.0 / (100.0 - fixture.RendererConf.Transparency);
treeCluster.Evaluate(Channels.Alpha, EvaluateOperator.Divide, divideValue);
}
overlay.Composite(treeCluster, Convert.ToInt32(fixture.CanvasX - extendedWidth / 2), Convert.ToInt32(fixture.CanvasY - extendedHeight / 2), CompositeOperator.SrcOver);
}
}
}
private void DrawImage(MagickImage overlay, DrawableFixture fixture)
{
//MainForm.Log(string.Format("Image: {0} ({1}) ...", fixture.Name, fixture.NifName), MainForm.LogLevel.notice);
string fileName = System.IO.Path.GetFileNameWithoutExtension(fixture.NifName);
string defaultTree = "elm1";
// Load default tree
if (!m_modelImages.ContainsKey(defaultTree))
{
string defaultTreeImage = string.Format("{0}\\data\\prerendered\\trees\\{1}.png", System.Windows.Forms.Application.StartupPath, defaultTree);
if (System.IO.File.Exists(defaultTreeImage))
{
MagickImage treeImage = new MagickImage(defaultTreeImage);
treeImage.Blur();
m_modelImages.Add(defaultTree, treeImage);
}
else
{
m_modelImages.Add(fileName, null);
}
}
// TreeClusters are sets of trees in a specified arrangement
// They need to be drawe separately
if (fixture.IsTreeCluster)
{
DrawTreeCluster(overlay, fixture);
return;
}
// Load model image
if (!m_modelImages.ContainsKey(fileName))
{
string objectImageFile = string.Format("{0}\\data\\prerendered\\objects\\{1}.png", System.Windows.Forms.Application.StartupPath, fileName);
if (fixture.IsTree)
{
objectImageFile = string.Format("{0}\\data\\prerendered\\trees\\{1}.png", System.Windows.Forms.Application.StartupPath, fileName);
}
if (System.IO.File.Exists(objectImageFile))
{
MagickImage objectImage = new MagickImage(objectImageFile);
if (fixture.IsTree)
{
objectImage.Blur();
}
m_modelImages.Add(fileName, objectImage);
}
else
{
if (fixture.IsTree)
{
MainForm.Log(string.Format("Can not find image for tree {0} ({1}), using default tree", fixture.Name, fixture.NifName), MainForm.LogLevel.warning);
m_modelImages.Add(fileName, m_modelImages[defaultTree]);
}
else
{
m_modelImages.Add(fileName, null);
}
}
}
// Draw the image
if (m_modelImages.ContainsKey(fileName) && m_modelImages[fileName] != null)
{
NifRow orginalNif = FixturesLoader.NifRows.Where(n => n.NifId == fixture.FixtureRow.NifId).FirstOrDefault();
if (orginalNif == null)
{
MainForm.Log(string.Format("Error with imaged nif ({0})!", fixture.FixtureRow.TextualName), MainForm.LogLevel.warning);
}
System.Drawing.SizeF objectSize = orginalNif.GetSize(0, 0);
// The final image
using (MagickImage modelImage = new MagickImage(MagickColors.Transparent, fixture.CanvasWidth, fixture.CanvasHeight))
{
// Place the replacing image
using (IMagickImage newModelImage = m_modelImages[fileName].Clone())
{
newModelImage.BackgroundColor = MagickColors.Transparent;
double scaleWidthToTreeImage = objectSize.Width / newModelImage.Width;
double scaleHeightToTreeImage = objectSize.Height / newModelImage.Height;
int width = Convert.ToInt32(newModelImage.Width * scaleWidthToTreeImage * fixture.Scale);
int height = Convert.ToInt32(newModelImage.Height * scaleHeightToTreeImage * fixture.Scale);
// Resize to new size
newModelImage.FilterType = FilterType.Gaussian;
newModelImage.VirtualPixelMethod = VirtualPixelMethod.Transparent;
newModelImage.Resize(width, height);
// Rotate the image
//newModelImage.Rotate(fixture.FixtureRow.A * -1 * fixture.FixtureRow.AxisZ3D);
newModelImage.Rotate((360d * fixture.FixtureRow.AxisZ3D - fixture.FixtureRow.A) * -1);
// Place in center of modelImage
modelImage.Composite(newModelImage, Gravity.Center, CompositeOperator.SrcOver);
}
// Draw the shaped model if wanted
if (fixture.RendererConf.HasLight)
{
using (MagickImage modelShaped = new MagickImage(MagickColors.Transparent, fixture.CanvasWidth, fixture.CanvasHeight))
{
foreach (DrawableElement drawableElement in fixture.DrawableElements)
{
var light = 1 - drawableElement.lightning;
modelShaped.Settings.FillColor = new MagickColor(
Convert.ToUInt16(ushort.MaxValue * light),
Convert.ToUInt16(ushort.MaxValue * light),
Convert.ToUInt16(ushort.MaxValue * light)
);
DrawablePolygon polyDraw = new DrawablePolygon(drawableElement.coordinates);
modelShaped.Draw(polyDraw);
}
using (MagickImage modelMask = new MagickImage(MagickColors.Transparent, fixture.CanvasWidth, fixture.CanvasHeight))
{
modelShaped.Blur();
modelMask.Composite(modelShaped, 0, 0, CompositeOperator.DstAtop);
modelMask.Composite(modelImage, 0, 0, CompositeOperator.DstIn);
modelMask.Level(new Percentage(20), new Percentage(100), Channels.All);
modelImage.Composite(modelMask, 0, 0, CompositeOperator.ColorDodge);
}
}
}
// Add the shadow if not a tree (tree shadow are substituted by a treeoverlay)
if (fixture.RendererConf.HasShadow && !fixture.IsTree)
{
CastShadow(
modelImage,
fixture.RendererConf.ShadowOffsetX,
fixture.RendererConf.ShadowOffsetY,
fixture.RendererConf.ShadowSize,
new Percentage(100 - fixture.RendererConf.ShadowTransparency),
fixture.RendererConf.ShadowColor
);
// Update the canvas position to match the new border
fixture.CanvasX -= fixture.RendererConf.ShadowSize;
fixture.CanvasY -= fixture.RendererConf.ShadowSize;
}
// Set transprency if not a tree (see shadow)
if (fixture.RendererConf.Transparency != 0 && !fixture.IsTree)
{
double divideValue = 100.0 / (100.0 - fixture.RendererConf.Transparency);
modelImage.Evaluate(Channels.Alpha, EvaluateOperator.Divide, divideValue);
}
// Place the image on the right position
overlay.Composite(modelImage, Convert.ToInt32(fixture.CanvasX), Convert.ToInt32(fixture.CanvasY), CompositeOperator.SrcOver);
}
}
}
async Task DoImageMagickCommandForGif(CommandContext ctx, byte[] buffer, ImageEditMode mode)
{
if (mode == ImageEditMode.Rescale)
{
await ctx.RespondAsync("이 모드는 속도가 느리고 이미지사이즈에 기반해서 느려지기 때문에 gif는 지원하지 않습니다.");
return;
}
MagickImageCollection image;
try
{
image = new MagickImageCollection(buffer);
}
catch (MagickMissingDelegateErrorException)
{
await ctx.RespondAsync("이미지 파일확장자를 알아볼 수 없다.");
return;
}
int originalWidth = image[0].Width, originalHeight = image[0].Height;
if (originalHeight * originalWidth > 1000000)
{
await ctx.RespondAsync($"Gif exceeds maximum size of 1000000 pixels (Actual size: {originalHeight * originalWidth})");
return;
}
if (image.Count > 100)
{
await ctx.RespondAsync($"Gif exceeds maximum frame count of 100 pixels (Actual count: {image.Count})");
return;
}
image.Coalesce();
long rawLength;
using (MemoryStream stream = new MemoryStream())
{
image.Write(stream);
rawLength = stream.Length;
}
double exceed = rawLength / 4194304d;
double rescale = 1f;
if (exceed > 1.0)
{
rescale = Math.Sqrt(exceed);
}
await ctx.TriggerTypingAsync();
for (int i = 0; i < image.Count; i++)
{
IMagickImage frame = image[i];
if (rescale > 1f)
{
if (rescale > 2f)
{
frame.AdaptiveResize((int)(frame.Width / rescale), (int)(frame.Height / rescale));
}
else
{
frame.Resize((int)(frame.Width / rescale), (int)(frame.Height / rescale));
}
}
DoMagic(mode, frame, originalWidth, originalHeight);
}
await ctx.TriggerTypingAsync();
image.OptimizeTransparency();
using (Stream stream = new MemoryStream())
{
image.Write(stream);
stream.Seek(0, SeekOrigin.Begin);
await ctx.RespondWithFileAsync(stream, "magic.gif");
}
}
// TODO: Name of this method + signature is a mess
private SearchResult FindTemplateInImage(IMagickImage needleImage, Gravity needleGravity, IMagickImage haystack, StitchTask task, Point anchor)
{
// Resize needle
var pixelMagnification = 8.0;
var magnification = Math.Min(1 / (double)pixelMagnification, 1.0);
var progress = (IProgress <double>)task;
var resizeAmount = new Percentage(magnification * 100);
var template = needleImage.Clone();
template.Resize(resizeAmount);
template.RePage();
IMagickImage searchArea = null;
var resized = false;
while (!resized)
{
try
{
lock (haystack)
{
searchArea = haystack.Clone();
searchArea.Resize(resizeAmount);
searchArea.RePage();
}
resized = true;
} catch (AccessViolationException)
{
Console.WriteLine("Corrupt Memory, trying again");
Thread.Sleep(500);
}
}
// We need to get the actual values here, since Resize() has unexpected rounding logic
// (only supports whole digit percentages) and if we don't use the actual values then
// scaling math won't work properly.
var oldWidth = searchArea.Width;
var oldHeight = searchArea.Height;
var bounds = new MagickGeometry(0, 0, searchArea.Width, searchArea.Height);
var candidates = FindTemplateCandidates(searchArea, template, bounds, progress, 2000, new HashSet <Point>());
if (candidates.Any())
{
var bestScore = candidates.First().Key;
this.initialCandidates = candidates.Where(x => x.Key < bestScore * 1.05).Select(x => {
return(new Point(x.Value.X / magnification, x.Value.Y / magnification));
}).ToList();
}
while (pixelMagnification > 1 && candidates.Any())
{
var newCandidates = new SortedList <double, Point>(new DuplicateKeyComparer <double>());
var newPixelMagnification = pixelMagnification / 2;
var newMagnification = Math.Min(1 / (double)newPixelMagnification, 1.0);
var newResizeAmount = new Percentage(newMagnification * 100);
var threshold = 2000.0;
var bestSeen = threshold;
var bestScore = candidates.First().Key;
var toLoop = candidates.Where(x => x.Key < bestScore * 1.05);
Console.WriteLine("Considering {0} candidates at {1}", toLoop.Count(), newMagnification);
IMagickImage newHaystack = null;
lock (haystack)
{
newHaystack = haystack.Clone();
newHaystack.Resize(newResizeAmount);
newHaystack.RePage();
}
var t2 = needleImage.Clone();
t2.Resize(newResizeAmount);
t2.RePage();
var cache = new HashSet <Point>();
foreach (var candidate in toLoop)
{
var point = new Point(candidate.Value.X / oldWidth * newHaystack.Width, candidate.Value.Y / oldHeight * newHaystack.Height);
var margin = newPixelMagnification;
var clampedBounds = new MagickGeometry(
(int)(point.X - margin),
(int)(point.Y - margin),
(int)(NeedleSize * newMagnification + margin * 2),
(int)(NeedleSize * newMagnification + margin * 2)
);
clampedBounds.X = Math.Max(0, clampedBounds.X);
clampedBounds.Y = Math.Max(0, clampedBounds.Y);
clampedBounds.Width = Math.Min(newHaystack.Width - clampedBounds.X, clampedBounds.Width);
clampedBounds.Height = Math.Min(newHaystack.Height - clampedBounds.Y, clampedBounds.Height);
var toAdd = FindTemplateCandidates(newHaystack, t2, clampedBounds, this, threshold, cache);
foreach (var add in toAdd)
{
newCandidates.Add(add.Key, add.Value);
if (add.Key < bestSeen)
{
bestSeen = add.Key;
Console.WriteLine("Updating best score: {0}", bestSeen);
}
}
}
candidates = newCandidates;
magnification = newMagnification;
pixelMagnification = newPixelMagnification;
oldWidth = newHaystack.Width;
oldHeight = newHaystack.Height;
}
Console.WriteLine("============ Final: {0}", candidates.Count);
if (candidates.Any())
{
var bestCandidate = candidates.First();
return(new SearchResult()
{
Distance = bestCandidate.Key,
HaystackPoint = bestCandidate.Value,
NeedlePoint = anchor
});
}
return(SearchResult.Null);
}
public static void Run([BlobTrigger("inbox/{inputFilename}", Connection = "StorageAccountConnString")] Stream inputStream, string inputFilename,
[Blob("outbox/out-{inputFilename}", FileAccess.Write, Connection = "StorageAccountConnString")] Stream outputStream, ILogger log)
{
log.LogInformation($"STEP: trigger fired for file:{inputFilename}, Size: {inputStream.Length} Bytes");
using (MagickImage image = new MagickImage(inputStream))
{
log.LogInformation($"STEP: Read image {inputFilename} with {image.BaseWidth} x {image.BaseHeight} in {image.Format.ToString()}");
// Step 0 - does nothing in the sample images I used
image.AutoOrient();
// Step 1 - Deskew
image.BackgroundColor = MagickColor.FromRgb(0, 0, 0);
image.Deskew(new Percentage(1)); // documentation suggests "A threshold of 40% works for most images" but 1% seems to work well
IMagickImage rotatedImage = image.Clone();
log.LogInformation($"STEP: Deskewed {inputFilename}");
// Step 2 - Apply threshold to transform in black and white image
image.AutoThreshold(AutoThresholdMethod.OTSU);
log.LogInformation($"STEP: Applied OTSU to {inputFilename}");
// Step 3 - find the regions (blocs) in the image and group them if large enough
IEnumerable <ConnectedComponent> components = null;
ConnectedComponentsSettings ccs = new ConnectedComponentsSettings();
ccs.AreaThreshold = 500 * 500.0; // 500x500 -- seems to be pointless, many more regions are returned
ccs.Connectivity = 8;
components = image.ConnectedComponents(ccs);
// if there are multiple blocs, consolidate them in a larger block
if (components != null && components.Count() > 0)
{
log.LogInformation($"STEP: Looked for regions in {inputFilename}, there are {components.Count()}");
// filter out the smaller rectangles, as the AreaThreshold parameter seems not to be working
List <ConnectedComponent> biggerComponents = components.Where(cc => cc.Height * cc.Width >= 250000 && cc.Height * cc.Width != image.Width * image.Height) /*.OrderByDescending(i => i.Height * i.Width)*/.ToList();
int topLeftX = biggerComponents[0].X, topLeftY = biggerComponents[0].Y, bottomRightX = biggerComponents[0].Width + topLeftX, bottomRightY = biggerComponents[0].Height + topLeftY;
foreach (ConnectedComponent cc in biggerComponents)
{
#region Debug -- draw the regions on the image
//DrawableStrokeColor strokeColor = new DrawableStrokeColor(new MagickColor("yellow"));
//DrawableStrokeWidth stokeWidth = new DrawableStrokeWidth(3);
//DrawableFillColor fillColor = new DrawableFillColor(new MagickColor(50, 50, 50, 128));
//DrawableRectangle dr = new DrawableRectangle(cc.X, cc.Y, cc.X + cc.Width, cc.Y + cc.Height);
//rotatedImage.Draw(dr, strokeColor, stokeWidth, fillColor);
#endregion
if (cc.X < topLeftX)
{
topLeftX = cc.X;
}
if (cc.Y < topLeftY)
{
topLeftY = cc.Y;
}
if (cc.X + cc.Width > bottomRightX)
{
bottomRightX = cc.X + cc.Width;
}
if (cc.Y + cc.Height > bottomRightY)
{
bottomRightY = cc.Y + cc.Height;
}
}
#region Debug -- draw the bounding box on the image
//DrawableStrokeColor strokeColor2 = new DrawableStrokeColor(new MagickColor("purple"));
//DrawableStrokeWidth stokeWidth2 = new DrawableStrokeWidth(3);
//DrawableFillColor fillColor2 = new DrawableFillColor(new MagickColor(50, 50, 50, 128));
//DrawableRectangle dr2 = new DrawableRectangle(topLeftX, topLeftY, bottomRightX, bottomRightY);
//rotatedImage.Draw(dr2, strokeColor2, stokeWidth2, fillColor2);
#endregion
// Step 4 - Crop the image
MagickGeometry mg = new MagickGeometry(topLeftX, topLeftY, bottomRightX - topLeftX, bottomRightY - topLeftY);
rotatedImage.RePage(); // this is needed because otherwise the crop is relative to the page information and sometimes this leads to an incorrect crop
rotatedImage.Crop(mg);
log.LogInformation($"STEP: Cropped {inputFilename} to fit existing large regions");
}
else
{
log.LogInformation($"STEP: Looked for large regions in {inputFilename}, none were found, skipping crop");
}
// Step 5 - Resize the image to 1200px width (todo: move to configuration)
int originalWidth = rotatedImage.BaseWidth;
int originalHeight = rotatedImage.BaseHeight;
rotatedImage.Resize(1200, 0); // make width 1200, height proportional
log.LogInformation($"STEP: Resized {inputFilename} from {originalWidth}x{originalHeight} to {image.BaseWidth}x{image.BaseHeight}");
// Step 6 - write out as Jpeg with 70% quality
rotatedImage.Format = MagickFormat.Jpeg;
rotatedImage.Quality = 70;
rotatedImage.Write(outputStream);
log.LogInformation($"STEP: Wrote out {inputFilename} as JPEG");
}
log.LogInformation($"STEP: Processing of {inputFilename} done");
}