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LEADTOOLS (Leadtools assembly)
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ScrambleCommand Class








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Leadtools.ImageProcessing Namespace : ScrambleCommand Class
Scrambles all or a portion of an image.
Object Model
Syntax
public class ScrambleCommand : RasterCommand, IRasterCommand  
'Declaration
 

Public Class ScrambleCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
'Usage
 

Dim instance As ScrambleCommand
public sealed class ScrambleCommand : IRasterCommand  
@interface LTScrambleCommand : LTRasterCommand
public class ScrambleCommand extends RasterCommand
function Leadtools.ImageProcessing.ScrambleCommand()
public ref class ScrambleCommand : public RasterCommand, IRasterCommand
Remarks

This command is available in the Document/Medical Imaging editions toolkits.

Scrambling a rectangular area means that the pixels in that area are shuffled around into a pseudo-random location within the area.

Given the same encrypt area (defined by ScrambleCommand.Rectangle) and the same ScrambleCommand.Key, setting ( ScrambleCommand.Flags = ScrambleCommandFlags.Encrypt) is the inverse of (ScrambleCommand.Flags = ScrambleCommandFlags.Decrypt).

Example

This example will scramble the upper-left quadrant of an image using the key 123 and then save the image to disk. It will then unscramble it and saves it disk for comparison.

Copy Code   
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing

      
Public Sub ScrambleCommandExample()
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
   Dim scrambledFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_scrambled.bmp")
   Dim unscrambledFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_unscrambled.bmp")

   ' Load the source image from disk
   Dim image As RasterImage = codecs.Load(srcFileName)

   Dim rc As LeadRect = New LeadRect(0, 0, image.Width \ 2, image.Height \ 2)
   Dim key As Integer = 123

   ' Scramble it and save it to disk
   Dim command As ScrambleCommand = New ScrambleCommand()
   command.Flags = ScrambleCommandFlags.Encrypt
   command.Rectangle = rc
   command.Key = key
   command.Run(image)
   codecs.Save(image, scrambledFileName, RasterImageFormat.Bmp, 24)

   ' Unscramble the image and save it to disk
   command.Flags = ScrambleCommandFlags.Decrypt
   command.Run(image)
   codecs.Save(image, unscrambledFileName, RasterImageFormat.Bmp, 24)

   ' Clean Up
   image.Dispose()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;

      
public void ScrambleCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
   string scrambledFileName = Path.Combine(ImagesPath.Path, "Image1_scrambled.bmp");
   string unscrambledFileName = Path.Combine(ImagesPath.Path, "Image1_unscrambled.bmp");

   // Load the source image from disk
   RasterImage image = codecs.Load(srcFileName);

   LeadRect rc = new LeadRect(0, 0, image.Width / 2, image.Height / 2);
   int key = 123;

   // Scramble it and save it to disk
   ScrambleCommand command = new ScrambleCommand();
   command.Flags = ScrambleCommandFlags.Encrypt;
   command.Rectangle = rc;
   command.Key = key;
   command.Run(image);
   codecs.Save(image, scrambledFileName, RasterImageFormat.Bmp, 24);

   // Unscramble the image and save it to disk
   command.Flags = ScrambleCommandFlags.Decrypt;
   command.Run(image);
   codecs.Save(image, unscrambledFileName, RasterImageFormat.Bmp, 24);

   // Clean Up
   image.Dispose();
   codecs.Dispose();
}
RasterCommandExamples.prototype.ScrambleCommandExample = function () {
    Tools.SetLicense();
    with (Leadtools) {
        with (Leadtools.Codecs) {
            with (Leadtools.ImageProcessing) {
                var codecs = new RasterCodecs();

                var srcFileName = "Assets\\Image1.cmp";
                var scrambledFileName = "Image1_scrambled.bmp";
                var unscrambledFileName = "Image1_unscrambled.bmp";
                var image;
                var command;
                // Load the source image from disk
                return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
                    return codecs.loadAsync(LeadStreamFactory.create(loadFile))
                })
            .then(function (img) {
                image = img;

                var rc = LeadRectHelper.create(0, 0, image.width / 2, image.height / 2);
                var key = 123;

                // Scramble it and save it to disk
                command = new ScrambleCommand();
                command.flags = ScrambleCommandFlags.encrypt;
                command.rectangle = rc;
                command.key = key;
                command.run(image);
                return Tools.AppLocalFolder().createFileAsync(scrambledFileName)
            })
            .then(function (saveFile) {
                return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 24)
            })
            .then(function () {

                // Unscramble the image and save it to disk
                command.flags = ScrambleCommandFlags.decrypt;
                command.run(image);
                return Tools.AppLocalFolder().createFileAsync(unscrambledFileName)
            })
            .then(function (saveFile) {
                return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 24)
            })
            .then(function () {
                // Clean Up
                image.close();
                codecs.close();
            });
            }
        }
    }
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;

      
public async Task ScrambleCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string scrambledFileName = @"Image1_scrambled.bmp";
   string unscrambledFileName = @"Image1_unscrambled.bmp";

   // Load the source image from disk
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   LeadRect rc = LeadRectHelper.Create(0, 0, image.Width / 2, image.Height / 2);
   int key = 123;

   // Scramble it and save it to disk
   ScrambleCommand command = new ScrambleCommand();
   command.Flags = ScrambleCommandFlags.Encrypt;
   command.Rectangle = rc;
   command.Key = key;
   command.Run(image);
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(scrambledFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

   // Unscramble the image and save it to disk
   command.Flags = ScrambleCommandFlags.Decrypt;
   command.Run(image);
   saveFile = await Tools.AppLocalFolder.CreateFileAsync(unscrambledFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

   // Clean Up
   image.Dispose();
}
Requirements

Target Platforms

See Also

Reference

ScrambleCommand Members
Leadtools.ImageProcessing Namespace

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