/// <summary>
/// extra_padding.pdf
/// </summary>
/// <param name="image"></param>
/// <param name="imageCorners"></param>
/// <param name="invalidColor"></param>
/// <returns></returns>
public static double GetExtraPaddingPercent(Bitmap image, ImageCorners imageCorners, Color invalidColor)
{
var diffPercentLeft = GetDiffPercentOnLeft(imageCorners, image, invalidColor);
var diffPercentRight = GetDiffPercentOnRight(imageCorners, image, invalidColor);
//return the max between the two
return(diffPercentLeft > diffPercentRight? diffPercentLeft : diffPercentRight);
}
public static ImageCorners GetActualImageCorners(ImageCorners clickImgCorners, Image image, IList <ClickPositionOnImage> clickInput)
{
return(new ImageCorners
{
Left = clickImgCorners.Left * image.Width / clickInput[0].AllowedWidth,
Right = clickImgCorners.Right * image.Width / clickInput[0].AllowedWidth,
Bottom = clickImgCorners.Bottom * image.Height / clickInput[0].AllowedHeight,
Top = clickImgCorners.Top * image.Height / clickInput[0].AllowedHeight
});
}
private static ImageCorners GetImgCornersWithExtraPadding(ImageClickInputDetails clickInputs, Bitmap image, ImageAlterationParams imageAlterationParams)
{
//image corners with respect to the dimensions of click area
var clickImgCorners = ImageCorners.GetImageCornersFromClickInputs(clickInputs, imageAlterationParams.MinImageHeightRatio, imageAlterationParams.BottomPaddingPercent);
//image corners in actual image dimension
var actualImgCorners = ImageCorners.GetActualImageCorners(clickImgCorners, image, clickInputs.ClickPositionListForImages);
//image corners with extra padding on on each side of disc
return(GetModifiedImgCornersForExtraWidth(actualImgCorners, imageAlterationParams.PercentExtraWidth));
}
private static bool CheckForModelPixelInYDirection(ImageCorners imageCorners, double x, Bitmap image, Color invalidColor)
{
for (var y = imageCorners.Top; y <= imageCorners.Bottom; y++)
{
var pixel = image.GetPixel((int)x, (int)y);
if (pixel.R != invalidColor.R || pixel.G != invalidColor.G || pixel.B != invalidColor.B)
{
return(true);
}
}
return(false);
}
private static ImageCorners GetModifiedImgCornersForExtraWidth(ImageCorners origCorners, double percentExtraWidth)
{
var extraOnEachSide = percentExtraWidth * origCorners.Width / 100.0;
//return modified left and right based on extraOnEachSide
return(new ImageCorners
{
Left = origCorners.Left - extraOnEachSide,
Right = origCorners.Right + extraOnEachSide,
Top = origCorners.Top,
Bottom = origCorners.Bottom
});
}
private static double GetDiffPercentOnRight(ImageCorners imageCorners, Bitmap image, Color invalidColor)
{
double x;
var noOfModelPixelsAlongX = 0;
for (x = imageCorners.Right + 1; x < image.Width; x++)
{
if (!CheckForModelPixelInYDirection(imageCorners, x, image, invalidColor))
{
break;
}
noOfModelPixelsAlongX++;
}
return(noOfModelPixelsAlongX * 100.0 / imageCorners.Width);
}
/// <summary>
/// The width of the object can be more than the diameter of the base disc
/// In such scenarios, we will need to keep some extra padding on each side of disc
/// while cropping the image. This function calculates the amount by which we should pad.
/// </summary>
/// <param name="contract"></param>
/// <returns></returns>
public static double GetExtraPadding(CreateMeshContract contract)
{
var maxExtraPaddingPercent = 0.0;
var bottomPaddingPercent = contract.BottomPaddingPercent;
//for each image
foreach (var clickInput in contract.ClickInputs.ImageClickInputDetailsList)
{
var imageName = clickInput.ImageName;
var bitmapImg = (Bitmap)Image.FromFile(string.Format(@"{0}\{1}", contract.ImageFolder, imageName));
//resize to 100 (small size)
const int newWidth = 100;
var newHeight = newWidth * bitmapImg.Height / bitmapImg.Width;
var imageAlterationParams = new ImageAlterationParams
{
ResizeType = ResizeType.ToSpecifiedSizes,
SpecificResizeHeight = newHeight,
SpecificResizeWidth = newWidth
};
var resizedImage = ImageResizer.ResizeImage(bitmapImg, imageAlterationParams);
//strip background
BackgroundStripper.StripBackground(resizedImage, contract.BackgroundStrippingParams);
//get actual borders for this image
var origImageCorners = ImageCorners.GetImageCornersFromClickInputs(clickInput, contract.MinImageHeightRatio, bottomPaddingPercent);
var actualImageCorners = ImageCorners.GetActualImageCorners(origImageCorners, resizedImage, clickInput.ClickPositionListForImages);
//calculate extra padding percent
var padding = ExtraPadding.GetExtraPaddingPercent(resizedImage, actualImageCorners,
contract.InvalidColor);
//check if it is more than the maximum so far
if (maxExtraPaddingPercent < padding)
{
maxExtraPaddingPercent = padding;
}
}
return(maxExtraPaddingPercent);
}