public int MinValue { get; set; }
@property (nonatomic, assign) NSInteger minValue
public int getMinValue();
public void setMinValue(
int intValue
);
MinValue # get and set (RasterImage)
Minimum grayscale value.
For every value between 0 and MinValue, Black (RGB(0,0,0)) will be used. For values between MinValue and MaxValue, the gray value to be displayed is calculated by : gray = (index - MinValue) * 255 / (MaxValue - MinValue).
index is the intensity value of the pixel. If the intensity value is > MaxValue, the color will be White. If the intensity value is < MinValue, the color will be Black. For those intensity values between MinValue and MaxValue, the above equation is used to determine the color, with index equal to the intensity value.
For more information, refer to Grayscale Images.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using Leadtools.Svg;
public void WindowLevelExample()
{
RasterCodecs codecs = new RasterCodecs();
// Load an image that has BottomLeft ViewPerspective
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP"));
// Change the image to 16-bit grayscale
GrayscaleCommand grayscaleCmd = new GrayscaleCommand(16);
grayscaleCmd.Run(image);
MinMaxBitsCommand minMaxBitsCmd = new MinMaxBitsCommand();
minMaxBitsCmd.Run(image);
MinMaxValuesCommand minMaxValuesCmd = new MinMaxValuesCommand();
minMaxValuesCmd.Run(image);
int lowBit = minMaxBitsCmd.MinimumBit;
int highBit = minMaxBitsCmd.MaximumBit;
int size = (1 << (image.HighBit - image.LowBit + 1));
RasterColor[] palette = new RasterColor[size];
// fill the first half of the LUT with RED
for (int x = 0; x < size / 2; x++)
{
palette[x].R = 255;
palette[x].G = 0;
palette[x].B = 0;
palette[x].Reserved = 0;
}
int minVal = minMaxValuesCmd.MinimumValue;
int maxVal = minMaxValuesCmd.MaximumValue;
// Fill the rest with gray values
for (int x = (size / 2); x < size; x++)
{
palette[x].R = Convert.ToByte(Math.Min(255, ((x - minVal) * 255 / (maxVal - minVal))));
palette[x].G = palette[x].R;
palette[x].B = palette[x].R;
palette[x].Reserved = 0;
}
image.WindowLevel(lowBit, highBit, palette, RasterWindowLevelMode.PaintAndProcessing);
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1_WindowLevel.BMP"), RasterImageFormat.Bmp, 0);
image.Dispose();
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
Your email has been sent to support! Someone should be in touch! If your matter is urgent please come back into chat.
Chat Hours:
Monday - Friday, 8:30am to 6pm ET
Thank you for your feedback!
Please fill out the form again to start a new chat.
All agents are currently offline.
Chat Hours:
Monday - Friday
8:30AM - 6PM EST
To contact us please fill out this form and we will contact you via email.