AutoCropRectangleCommand Class

Summary

Gets the rectangle to be used to trim the image if AutoCropCommand were used.

Syntax

Objective-C

C++/CLI

Java

Python

public class AutoCropRectangleCommand : RasterCommand

@interface LTAutoCropRectangleCommand : LTRasterCommand

public class AutoCropRectangleCommand 
    extends RasterCommand

public ref class AutoCropRectangleCommand : public RasterCommand

class AutoCropRectangleCommand(RasterCommand):

Remarks

Use this command in conjunction with CropCommand instead of AutoCropCommand when you want to modify the trim rectangle. For example, you could let the user preview the rectangle, or you could add a margin.
This command uses image coordinates to specify the area to be trimmed. Therefore, you must account for the view perspective of the image. For information about image coordinates, refer to RasterViewPerspective.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support signed data images.
This command does not support 32-bit grayscale images.

Example

Run the AutoCropRectangleCommand on an image.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void AutoCropRectangleCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")); 
 
   // Prepare the command 
   AutoCropRectangleCommand command = new AutoCropRectangleCommand(); 
   command.Threshold = 0; 
   command.Run(image); 
   MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + "\n" + 
         "Top = " + command.Rectangle.Top.ToString() + "\n" + 
         "Right = " + command.Rectangle.Right.ToString() + "\n" + 
         "Bottom = " + command.Rectangle.Bottom.ToString()); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.Test; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.AutoCropRectangleCommand; 
 
 
public void autoCropRectangleCommandExample() { 
 
    final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
    // Load an image 
    RasterCodecs codecs = new RasterCodecs(); 
    codecs.setThrowExceptionsOnInvalidImages(true); 
 
    RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "Master.jpg")); 
 
    // Prepare the command 
    AutoCropRectangleCommand command = new AutoCropRectangleCommand(); 
    command.setThreshold(0); 
    command.run(image); 
 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 0); 
 
    System.out.printf("Left = %1s%nTop = %2s%nRight = %3s%nBottom = %4s%n", command.getRectangle().getLeft(), 
            command.getRectangle().getRight(), command.getRectangle().getRight(), 
            command.getRectangle().getBottom()); 
 
    System.out.println("Command run and image saved to: " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
 
}