public static ImgStripStatus Process(Bitmap imgWithoutModel, Bitmap img, ComparisonWithImgWithoutModelParams @params, Color backgroundColor)
{
var imgStripStatus = new ImgStripStatus(img.Width, img.Height);
for (var y = 0; y < img.Height; y++)
{
for (var x = 0; x < img.Width; x++)
{
var imgWithoutModelColor = imgWithoutModel.GetPixel(x, y);
var imgColor = img.GetPixel(x, y);
var variationR = Math.Abs(imgColor.R - imgWithoutModelColor.R);
var variationG = Math.Abs(imgColor.G - imgWithoutModelColor.G);
var variationB = Math.Abs(imgColor.B - imgWithoutModelColor.B);
var similar = variationR <= @params.AllowedVariationInRgb && variationG <= @params.AllowedVariationInRgb && variationB <= @params.AllowedVariationInRgb;
//if the color is the same as the color on the image without model then it is the background
if (similar)
{
imgStripStatus.SetInvalid(x, y);
}
}
}
return(imgStripStatus);
}
public BlockSizeBasedStripper(ImgStripStatus stripStatus, bool blocksOfInvalidPixels = true)
{
_stripStatus = stripStatus;
_blocksOfInvalidPixels = blocksOfInvalidPixels;
_blockIndices = new long[stripStatus.Width, stripStatus.Height];
Blocks = new Dictionary <long, Block>();
long blockCounter = 0;
for (var y = 0; y < _stripStatus.Height; y++)
{
for (var x = 0; x < _stripStatus.Width; x++)
{
if (SatisfiesCondition(y, x))
{
continue; //is a background pixel
}
//if any pixel around it is assigned to a block, take that number
var validNeighbors = GetValidNeighbors(y, x, _stripStatus.Width);
if (validNeighbors.Count() > 0)
{
//use the first block index
var indexToUse = validNeighbors.First();
var blockToUse = Blocks[indexToUse];
_blockIndices[x, y] = indexToUse;
blockToUse.AddPixelIndex(x, y);
//handle the condition where there can be neighbors with different block indices
//they all should be normalized to have one block index as they are all connected
foreach (var blockIndex in validNeighbors.Where(index => index != indexToUse))
{
//merge the blocks
var blockToMerge = Blocks[blockIndex];
foreach (var position in blockToMerge.PixelPositions)
{
_blockIndices[position.X, position.Y] = indexToUse;
}
blockToUse.MergeBlock(blockToMerge);
Blocks.Remove(blockIndex);
}
}
else
{
//if none of the neighbors had a block assigned, then assign to a new block
blockCounter++;
var block = new Block();
block.AddPixelIndex(x, y);
_blockIndices[x, y] = blockCounter;
Blocks.Add(blockCounter, block);
}
}
}
}
