Lusamine.ImageIdentifier 1.2.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Lusamine.ImageIdentifier --version 1.2.0
                    


                    

                
NuGet\Install-Package Lusamine.ImageIdentifier -Version 1.2.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Lusamine.ImageIdentifier" Version="1.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Lusamine.ImageIdentifier" Version="1.2.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Lusamine.ImageIdentifier" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Lusamine.ImageIdentifier --version 1.2.0
                    


                    

                
#r "nuget: Lusamine.ImageIdentifier, 1.2.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Lusamine.ImageIdentifier@1.2.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Lusamine.ImageIdentifier&version=1.2.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Lusamine.ImageIdentifier&version=1.2.0
                    


                            Install as a Cake Tool

Lusamine.ImageIdentifier

Identify an image's format and pixel dimensions by reading only its header. The full image is never loaded into memory. Works over any readable stream, including non-seekable ones (network, compression).

Supported formats: PNG, JPEG, GIF, BMP, WebP (VP8/VP8L/VP8X), TIFF, ICO.

Usage

using Lusamine.ImageIdentifier;

var identifier = new ImageIdentifier();

using var stream = File.OpenRead("photo.jpg");
ImageInfo? info = identifier.Identify(stream);

if (info is not null)
    Console.WriteLine($"{info.Format} {info.Width}x{info.Height}");

Identify returns null when the data is unrecognized or the header is truncated.

Why

Only the leading header bytes are read (typically well under 1 KB), so identifying a multi-megabyte image is allocation-light and near-instant. For non-seekable streams the reader skips forward by reading and discarding, so it still never buffers the whole file.

Extensibility

The decoder set is injectable for custom formats or testing:

var identifier = new ImageIdentifier(new IImageFormatDecoder[] { new MyFormatDecoder() });
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net10.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.3.0 164 5/30/2026
1.2.2 100 5/27/2026
1.2.1 154 5/26/2026
1.2.0 103 5/26/2026
1.1.0 87 5/26/2026
1.0.1 103 5/26/2026
1.0.0 89 5/26/2026