FromByte Method

Summary

Sets the comment data to the specified array of bytes.

Syntax

Objective-C

C++/CLI

Java

Python

public void FromByte( 
   byte[] value 
)

- (void)fromByte:(unsigned char *)buffer itemCount:(NSUInteger)count

public void fromByte( 
   byte[] byte[Value 
);

public: 
void FromByte(  
   array<byte>^ value 
)

def FromByte(self,value):

Parameters

value
The data to set.

Example

using Leadtools; 
using Leadtools.Codecs; 
 
 
public void RasterCommentMetadataExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
	codecs.ThrowExceptionsOnInvalidImages = true; 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_comments.tif"); 
 
	// Load the image 
	RasterImage image = codecs.Load(srcFileName); 
	codecs.Save(image, destFileName, RasterImageFormat.Tif, 24); 
 
	image.Dispose(); 
 
	// Write some comments to the existing tif file 
	RasterCommentMetadata comment = new RasterCommentMetadata(); 
	comment.Type = RasterCommentMetadataType.Artist; 
	string artistNameWrite = "Artist name"; 
	comment.FromAscii(artistNameWrite); 
	Console.WriteLine("Writing Artist"); 
	codecs.WriteComment(destFileName, 1, comment); 
 
	comment.Type = RasterCommentMetadataType.GpsLatitude; 
	RasterMetadataRational[] rationalsWrite = new RasterMetadataRational[3]; 
	for (int i = 0; i < rationalsWrite.Length; i++) 
		rationalsWrite[i] = new RasterMetadataRational(i + 3, i + 2); 
 
	comment.FromRational(rationalsWrite); 
	Console.WriteLine("Writing GpsLatitude"); 
	codecs.WriteComment(destFileName, 1, comment); 
 
	// Now read the comments from the tif file 
 
	// read ASCII 
	comment = codecs.ReadComment(destFileName, 1, RasterCommentMetadataType.Artist); 
	string artistNameRead = comment.ToAscii(); 
	Console.WriteLine("Artist: {0}", artistNameRead); 
	Assert.IsTrue(artistNameRead == artistNameWrite); 
 
	// read rationals 
	comment = codecs.ReadComment(destFileName, 1, RasterCommentMetadataType.GpsLatitude); 
	RasterMetadataRational[] rationalsRead = comment.ToRational(); 
 
	int size = rationalsRead.Length; 
	Console.WriteLine("GpsLatitude: size = {0} ", size); 
	for (int i = 0; i < size; i++) 
		Console.WriteLine("{0}/{1}", rationalsRead[i].Numerator, rationalsRead[i].Denominator); 
 
	Assert.IsTrue(rationalsRead.Length == rationalsWrite.Length); 
	for (int i = 0; i < rationalsRead.Length; i++) 
	{ 
		Assert.IsTrue(rationalsRead[i].Numerator == rationalsWrite[i].Numerator); 
		Assert.IsTrue(rationalsRead[i].Denominator == rationalsWrite[i].Denominator); 
	} 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterCommentMetadata Class

RasterCommentMetadata Members

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Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies