Color Property

Summary

The color for extraction.

Syntax

Objective-C

C++/CLI

Java

Python

public RasterColor Color {get; set;}

@property (nonatomic, strong) LTRasterColor * color;

public RasterColor getColor(); 
public void setColor( 
   RasterColor rasterColor 
);

public:  
   property RasterColor^ Color 
   { 
      RasterColor^ get() 
      void set(RasterColor^ value) 
   }

Color # get and set (ExObjColorInfo)

Property Value

The color for object extraction. The default value is RasterColor.Black.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
 
public void ExtractObjectsCommandUseMultiColorsExample() 
{ 
   using (RasterCodecs codecs = new RasterCodecs()) 
   // Load the original image 
   using (RasterImage inputImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "unwarp1.jpg"))) 
   { 
      // Setup the extraction options 
      Tuple<string, RasterColor>[] colors = new Tuple<string, RasterColor>[] 
      { 
         Tuple.Create("DarkGray", new RasterColor(30, 30, 30)), 
         Tuple.Create("DarkGreen", new RasterColor(41, 108, 70)), 
         Tuple.Create("LightRed", new RasterColor(200, 68, 65)) 
      }; 
      ExtractObjectsCommand command = new ExtractObjectsCommand() 
      { 
         ColorInfo = colors 
            .Select(c => new ExObjColorInfo() 
            { 
               Color = c.Item2, 
               Threshold = 50 
            }) 
            .ToArray(), 
         DetectChildren = true, 
         EightConnectivity = true, 
         IgnoreSmallNoise = true, 
         Outline = true, 
         SmallNoiseThreshold = 5, // Filter out noise smaller than 5x5 pixels 
         UseMultiColors = true 
      }; 
 
      // Extract the objects 
      command.Run(inputImage); 
 
      using (ExObjData data = command.Data) 
      { 
         // Put objects into one list for processing all at once 
         List<ExObjObject> objects = new List<ExObjObject>(); 
         foreach (ExObjResult result in data) 
            objects.AddRange(result.Objects); 
 
         // Setup the region options 
         ExObjRegionOptions regionOptions = new ExObjRegionOptions() 
         { 
            Horizontal = true 
         }; 
 
         // Calculate each object's region 
         data.CalculateRegion(objects, regionOptions); 
 
         // Create an output image 
         using (RasterImage outputImage = RasterImage.Create(inputImage.Width, inputImage.Height, 24, inputImage.XResolution, RasterColor.White)) 
         { 
            // Extract each color to a separate image 
            int colorIndex = -1; 
 
            foreach (ExObjResult result in data) 
            { 
               colorIndex++; 
 
               // Fill the output image with white 
               new FillCommand(RasterColor.White).Run(outputImage); 
 
               // Populate the output image with each object's region 
               foreach (ExObjObject @object in result.Objects) 
                  foreach (ExObjSegment segment in @object.RegionHorizontal) 
                  { 
                     // Update the region to the current segment 
                     outputImage.AddRectangleToRegion(null, segment.Bounds, RasterRegionCombineMode.Set); 
 
                     // Fill the region with the current color 
                     new FillCommand(colors[colorIndex].Item2).Run(outputImage); 
                  } 
 
               // Clear the output image's region 
               outputImage.MakeRegionEmpty(); 
 
               // Save the output image 
               codecs.Save(outputImage, Path.Combine(LEAD_VARS.ImagesDir, $"ExtractObjectsMultiColors_{colors[colorIndex].Item1}.png"), RasterImageFormat.Png, 0); 
            } 
         } 
      } 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

ExObjColorInfo Class

ExObjColorInfo Members

Leadtools.ImageProcessing.Core Namespace

Download our FREE evaluation

Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies