GrayscaleCommand Constructor()

Summary

Initializes a new instance of the GrayscaleCommand class with default parameters.

Syntax

Objective-C

C++/CLI

Java

Python

public GrayscaleCommand()

- (instancetype)init

public GrayscaleCommand()

public: 
GrayscaleCommand();

__init__() # Default constructor

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void GrayscaleCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName8 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale8.jpg"); 
	string destFileName12 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale12.jpg"); 
	string destFileName16 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_grayscale16.jpg"); 
 
	// Load the source image from disk as 24-bits/pixel 
	RasterImage image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); 
 
	// Check the grayscale mode 
	Console.WriteLine("Grayscale mode of original image = {0}", image.GrayscaleMode); 
 
	// Convert to 8-bit grayscale 
	GrayscaleCommand command = new GrayscaleCommand(); 
	command.BitsPerPixel = 8; 
	command.Run(image); 
 
	// Check the grayscale mode 
	Console.WriteLine("Grayscale mode after grayscale command with 8 bpp = {0}", image.GrayscaleMode); 
 
	// Save it to disk 
 
	codecs.Options.Jpeg.Save.QualityFactor = 2; 
	codecs.Save(image, destFileName8, RasterImageFormat.Jpeg, 8); 
	image.Dispose(); 
 
	// Load the image again this time grayscale to 12-bits/pixel 
	image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); 
	command.BitsPerPixel = 12; 
	command.Run(image); 
	Console.WriteLine("Grayscale mode after grayscale command with 12 bpp = {0}", image.GrayscaleMode); 
	codecs.Options.Jpeg.Save.QualityFactor = 2; 
	codecs.Save(image, destFileName12, RasterImageFormat.Jpeg, 12); 
	image.Dispose(); 
 
	// Load the image again this time grayscale to 16-bits/pixel 
	image = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); 
	command.BitsPerPixel = 16; 
	command.Run(image); 
	Console.WriteLine("Grayscale mode after grayscale command with 16 bpp = {0}", image.GrayscaleMode); 
 
	// When saving 16-bit jpegs, you must use lossless quality factor 
	codecs.Options.Jpeg.Save.QualityFactor = 0; 
	codecs.Save(image, destFileName16, RasterImageFormat.Jpeg, 16); 
	image.Dispose(); 
 
	// Clean Up 
	codecs.Dispose(); 
} 
 
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.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.*; 
 
 
public void grayscaleCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "rgsref.cmp"); 
   String destFileName8 = combine(LEAD_VARS_IMAGES_DIR, "rgsref_grayscale8.jpg"); 
   String destFileName12 = combine(LEAD_VARS_IMAGES_DIR, "rgsref_grayscale12.jpg"); 
   String destFileName16 = combine(LEAD_VARS_IMAGES_DIR, "rgsref_grayscale16.jpg"); 
 
   // Load the source image from disk as 24-bits/pixel 
   RasterImage image = codecs.load(srcFileName, 24, CodecsLoadByteOrder.BGR, 1, 1); 
 
   // Check the grayscale mode 
   System.out.printf("Grsyscale mode of original image = %s%n", image.getGrayscaleMode()); 
 
   // Convert to 8-bit grayscale 
   GrayscaleCommand command = new GrayscaleCommand(); 
   command.setBitsPerPixel(8); 
   command.run(image); 
 
   // Check the grayscale mode 
   System.out.printf("Grsyscale mode after grayscale command with 8 bpp = %s%n", image.getGrayscaleMode()); 
 
   // Save it to disk 
 
   codecs.getOptions().getJpeg().getSave().setQualityFactor(2); 
   codecs.save(image, destFileName8, RasterImageFormat.JPEG, 8); 
   image.dispose(); 
 
   // Load the image again this time grayscale to 12-bits/pixel 
   image = codecs.load(srcFileName, 24, CodecsLoadByteOrder.BGR, 1, 1); 
   command.setBitsPerPixel(12); 
   command.run(image); 
   System.out.printf("Grsyscale mode after grayscale command with 12 bpp = %s%n", image.getGrayscaleMode()); 
   codecs.getOptions().getJpeg().getSave().setQualityFactor(2); 
   codecs.save(image, destFileName12, RasterImageFormat.JPEG, 12); 
   image.dispose(); 
 
   // Load the image again this time grayscale to 16-bits/pixel 
   image = codecs.load(srcFileName, 24, CodecsLoadByteOrder.BGR, 1, 1); 
   command.setBitsPerPixel(16); 
   command.run(image); 
   System.out.printf("Grsyscale mode after grayscale command with 16 bpp = %s%n", image.getGrayscaleMode()); 
 
   // When saving 16-bit jpegs, you must use lossless quality factor 
   codecs.getOptions().getJpeg().getSave().setQualityFactor(0); 
   codecs.save(image, destFileName16, RasterImageFormat.JPEG, 16); 
 
   assertTrue("file unsuccessfully saved to " + destFileName16, (new File(destFileName16)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName16); 
 
   // Clean Up 
   image.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

GrayscaleCommand Class

GrayscaleCommand Members

Overload List

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Help Version 23.0.2024.5.22