public int YScalarNumerator { get; set; }
@property (nonatomic, assign) NSInteger yScalarNumerator
public int getYScalarNumerator();
public void setYScalarNumerator(
int intValue
);
YScalarNumerator # get and set (RasterRegionXForm)
The denominator for the Y scaling factor.
When translating information from the image, you can use the height of the painting method destination rectangle for this value.
When translating information to the image, you can use the height of the painting method source rectangle for this value. (By default, it is the image height.)
Refer to the XScalarNumerator property to see which methods translate which direction.
For more information, refer to Translating Coordinates for a Region.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
public void RasterRegionTransformExample()
{
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_TransformRegion.bmp");
using (RasterCodecs codecs = new RasterCodecs())
{
// Load the source image
using (RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Add a large elliptical region
image.AddEllipseToRegion(null, new LeadRect(0, 0, image.ImageWidth, image.ImageHeight), RasterRegionCombineMode.Set);
// Fill the image with yellow
FillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow));
cmd.Run(image);
// Get the region
using (RasterRegion region = image.GetRegion(null))
{
// Transform this region by making it twice as small
LeadRect bounds = region.GetBounds();
RasterRegionXForm xform = RasterRegionXForm.Default;
xform.XScalarNumerator = 1;
xform.XScalarDenominator = 2;
xform.YScalarNumerator = 1;
xform.YScalarDenominator = 2;
xform.XOffset = bounds.Width / 2;
xform.YOffset = bounds.Height / 2;
region.Transform(xform);
// Re-set this region into the image
image.SetRegion(null, region, RasterRegionCombineMode.Set);
}
// Now fill with red and save
cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red));
cmd.Run(image);
codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
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