- (BOOL)isVisible:(LeadPoint)point
def IsVisible(self,point):
point
The LeadPoint structure to test.
true when point is contained within this RasterRegion; false, otherwise.
This example will create a small elliptical region in an image, gets the RasterRegion object before resetting the image region. It will then switch the red and blue component of every pixel inside the region data.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
public void RasterRegionIsVisibleExample()
{
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_IsVisibleRegion.bmp");
using (RasterCodecs codecs = new RasterCodecs())
{
// Load the source image
using (RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Add a small elliptical region
image.AddEllipseToRegion(null, new LeadRect(image.ImageWidth / 3, image.ImageHeight / 3, image.ImageWidth / 3, image.ImageHeight / 3), RasterRegionCombineMode.Set);
// Get the region
using (RasterRegion region = image.GetRegion(null))
{
// Remove the region from the image
image.MakeRegionEmpty();
// Loop the image pixels, if it is inside the region, switch
// the red and blue component of the pixel color
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
// Check if this pixel is inside the region
if (region.IsVisible(new LeadPoint(x, y)))
{
// Yes, flip its R and B component
RasterColor color = image.GetPixelColor(y, x);
color = new RasterColor(color.B, color.G, color.R);
image.SetPixelColor(y, x, color);
}
}
}
}
codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import org.junit.*;
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;
import leadtools.*;
import leadtools.codecs.*;
import leadtools.imageprocessing.FillCommand;
public void rasterRegionIsVisibleExample() {
final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images";
String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp");
String destFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1_IsVisibleRegion.bmp");
RasterCodecs codecs = new RasterCodecs();
// Load the source image
RasterImage image = codecs.load(srcFileName, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1);
// Add a small elliptical region
image.addEllipseToRegion(null, new LeadRect(image.getImageWidth() / 3, image.getImageHeight() / 3,
image.getImageWidth() / 3, image.getImageHeight() / 3), RasterRegionCombineMode.SET);
// Get the region
RasterRegion region = image.getRegion(null);
// Remove the region from the image
image.makeRegionEmpty();
// Loop the image pixels, if it is inside the region, switch
// the red and blue component of the pixel color
for (int y = 0; y < image.getHeight(); y++) {
for (int x = 0; x < image.getWidth(); x++) {
// Check if this pixel is inside the region
if (region.isVisible(new LeadPoint(x, y))) {
// Yes, flip its R and B component
RasterColor color = image.getPixelColor(y, x);
color = new RasterColor(color.b(), color.g(), color.r());
image.setPixelColor(y, x, color);
}
}
}
codecs.save(image, destFileName, RasterImageFormat.BMP, 24);
assertTrue("Image unsuccessfully saved", new File(destFileName).exists());
System.out.println("Command run and image saved to " + destFileName);
}
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