Repository Analysis

SixLabors/ImageSharp

:camera: A modern, cross-platform, 2D Graphics library for .NET

6.9 Low AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of SixLabors/ImageSharp, a C# project with 8,009 GitHub stars. SynthScan v2.0 examined 325,790 lines of code across 2137 source files, recording 2346 pattern matches distributed across 5 syntactic categories. The overall adjusted score of 6.9 places this repository in the Low AI signal band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

6.9
Adjusted Score
6.9
Raw Score
100%
Time Factor
2026-07-14
Last Push
8.0K
Stars
C#
Language
325.8K
Lines of Code
2.1K
Files
2.3K
Pattern Hits
2026-07-14
Scan Date
0.00
HC Hit Rate

What These Metrics Mean

Adjusted Score
Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score
The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor
The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits
Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate
High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files
Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

Longitudinal tracking requires multiple scan runs. Once this repository is re-scanned after new commits land, this chart will visualise how the synthetic code signal evolves over time — enabling you to detect whether AI authorship is growing, stabilising, or being actively corrected by human engineers.

No multi-scan history yet — run the scanner again to build trend data.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 0HIGH 0MEDIUM 3LOW 2343

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 2346 distinct pattern matches across 5 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Over-Commented Block2335 hits · 2225 pts
SeverityFileLineSnippetContext
LOWtests/ImageSharp.Tests/TestFile.cs21 /// The "Formats" directory, as lazy valueCOMMENT
LOWtests/ImageSharp.Tests/TestFile.cs41COMMENT
LOWtests/ImageSharp.Tests/TestFile.cs61COMMENT
LOWtests/ImageSharp.Tests/TestFile.cs81 public static TestFile Create(string file)COMMENT
LOWtests/ImageSharp.Tests/TestFile.cs101 public string GetFileNameWithoutExtension(object value)COMMENT
LOWtests/ImageSharp.Tests/TestFontUtilities.cs1// Copyright (c) Six Labors.COMMENT
LOWtests/ImageSharp.Tests/TestFontUtilities.cs21 /// <param name="file">COMMENT
LOW…/ImageSharp.Tests/ColorProfiles/Icc/TestIccProfiles.cs21 /// <summary>COMMENT
LOW…/ImageSharp.Tests/ColorProfiles/Icc/TestIccProfiles.cs41 /// <summary>COMMENT
LOW…mageSharp.Tests/Formats/Exr/ExrDecoderSecurityTests.cs21 /// EXR-1 — EXR DataWindow Integer Overflow Produces Negative Image Dimensions (DoS)COMMENT
LOW…mageSharp.Tests/Formats/Exr/ExrDecoderSecurityTests.cs41COMMENT
LOW…ageSharp.Tests/Formats/Png/ReferenceImplementations.cs1// Copyright (c) Six Labors.COMMENT
LOW…ageSharp.Tests/Formats/Png/ReferenceImplementations.cs181 /// Calculates the average value of two bytesCOMMENT
LOW…mats/Jpg/Utils/ReferenceImplementations.AccurateDCT.cs1// Copyright (c) Six Labors.COMMENT
LOW…g/Utils/ReferenceImplementations.StandardIntegerDCT.cs1// Copyright (c) Six Labors.COMMENT
LOW…g/Utils/ReferenceImplementations.StandardIntegerDCT.cs21 /// https://github.com/mozilla/mozjpeg/blob/master/jfdctint.cCOMMENT
LOW…g/Utils/ReferenceImplementations.StandardIntegerDCT.cs221 private const int W3pw5 = W3 + W5;COMMENT
LOW…Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs281 UniformUnmanagedMemoryPoolMemoryAllocator allocator = new(512, 1024, 16 * 1024, 1024);COMMENT
LOW…Allocators/UniformUnmanagedPoolMemoryAllocatorTests.cs301 AllocateGroupAndForget(allocator, lengthInner);COMMENT
LOWtests/ImageSharp.Tests/Color/RgbaDouble.cs1// Copyright (c) Six Labors.COMMENT
LOWtests/ImageSharp.Tests/Color/RgbaDouble.cs21/// </remarks>COMMENT
LOWtests/ImageSharp.Tests/Color/RgbaDouble.cs61 this.B = b;COMMENT
LOW…ts/ImageSharp.Tests/TestUtilities/TestDataGenerator.cs1// Copyright (c) Six Labors.COMMENT
LOW…/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs41COMMENT
LOW…/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs181 provider,COMMENT
LOW…/ImageSharp.Tests/TestUtilities/TestImageExtensions.cs721COMMENT
LOWtests/ImageSharp.Tests/TestUtilities/TestEnvironment.cs121 internal static Architecture ProcessArchitecture => RuntimeInformation.ProcessArchitecture;COMMENT
LOW…ageSharp.Tests/TestUtilities/ImagingTestCaseUtility.cs21COMMENT
LOW…TestUtilities/ImageComparison/TolerantImageComparer.cs21 public TolerantImageComparer(float imageThreshold, int perPixelManhattanThreshold = 0)COMMENT
LOW…TestUtilities/ImageComparison/TolerantImageComparer.cs41 /// <cref>https://en.wikipedia.org/wiki/Taxicab_geometry</cref>COMMENT
LOW…ests/TestUtilities/FeatureTesting/FeatureTestRunner.cs21 /// <para>COMMENT
LOW…s/TestUtilities/Attributes/WithBlankImagesAttribute.cs1// Copyright (c) Six Labors.COMMENT
LOW…Utilities/Attributes/WithTestPatternImagesAttribute.cs1// Copyright (c) Six Labors.COMMENT
LOW…Utilities/Attributes/WithSolidFilledImagesAttribute.cs1// Copyright (c) Six Labors.COMMENT
LOW…Utilities/Attributes/WithSolidFilledImagesAttribute.cs61 {COMMENT
LOW…Utilities/Attributes/WithSolidFilledImagesAttribute.cs141COMMENT
LOW…sts/TestUtilities/Attributes/ImageDataAttributeBase.cs121 }COMMENT
LOWtests/ImageSharp.Benchmarks/Config.HwIntrinsics.cs21 // * EnableSSE3COMMENT
LOW…sts/ImageSharp.Benchmarks/Bulk/ShuffleFloat4Channel.cs21COMMENT
LOW…sts/ImageSharp.Benchmarks/Bulk/ShuffleFloat4Channel.cs41// Runtime=.NET Core 3.1COMMENT
LOW…sts/ImageSharp.Benchmarks/Bulk/ShuffleFloat4Channel.cs61// | Shuffle4Channel | 1. No HwIntrinsics | DOTNET_EnableHWIntrinsic=0,DOTNET_FeatureSIMD=0 | 2048 | 980.134 ns | 3.740COMMENT
LOW…sts/ImageSharp.Benchmarks/Bulk/ShuffleFloat4Channel.cs81// | Shuffle4Channel | 2. SSE | DOTNET_EnableAVX=0 | 128 | 11.564 ns | 0.02COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ToVector4_Bgra32.cs21 }COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ShuffleByte4Channel.cs21COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ShuffleByte4Channel.cs41// Runtime=.NET Core 3.1COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ShuffleByte4Channel.cs61// | Shuffle4Channel | 1. No HwIntrinsics | DOTNET_EnableHWIntrinsic=0,DOTNET_FeatureSIMD=0 | 2048 | 315.29 ns | 5.206 COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ShuffleByte4Channel.cs81// | Shuffle4Channel | 2. SSE | DOTNET_EnableAVX=0 | 128 | 11.39 ns | 0.045COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ToVector4_Rgb24.cs21 }COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ToVector4_Rgb24.cs41// | | | | | | | | | COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/ToVector4_Rgb24.cs61// | PixelOperations_Specialized | Job-OPAORC | .NET Core 2.1 | 2048 | 1,985.5 ns | 4,714.23 ns | 258.40 ns | 0.36 | COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/Shuffle3Channel.cs41//COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/Shuffle3Channel.cs61COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/Shuffle3Channel.cs81// | Shuffle3 | 1. No HwIntrinsics | DOTNET_EnableHWIntrinsic=0,DOTNET_FeatureSIMD=0 | 384 | 155.68 ns | 0.539 ns | 0.COMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs41// [Host] : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJITCOMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs61// | | | | | COMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs81// | | | | | COMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs101// Runtime=.NET 6.0COMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs121// | Shuffle4Slice3 | 1. No HwIntrinsics | DOTNET_EnableHWIntrinsic=0,DOTNET_FeatureSIMD=0 | 512 | 165.31 COMMENT
LOW…ts/ImageSharp.Benchmarks/Bulk/Shuffle4Slice3Channel.cs141// | Shuffle4Slice3FastFallback | 1. No HwIntrinsics | DOTNET_EnableHWIntrinsic=0,DOTNET_FeatureSIMD=0 | 2048 | 196.85 COMMENT
LOWtests/ImageSharp.Benchmarks/Bulk/FromRgba32Bytes.cs61 public void OptimizedBulk()COMMENT
2275 more matches not shown…
AI Slop Vocabulary3 hits · 9 pts
SeverityFileLineSnippetContext
MEDIUM…TestUtilities/ImageComparison/TolerantImageComparer.cs67 // TODO: Comparing through Rgba64 may not robust enough because of the existence of super high precision pixel tCOMMENT
MEDIUM…ts/TestUtilities/ImageComparison/ExactImageComparer.cs25 // TODO: Comparing through Rgba64 may not be robust enough because of the existence of super high precision pixeCOMMENT
MEDIUMsrc/ImageSharp/Metadata/Profiles/ICC/IccProfile.SRGB.cs276 // Downsample a few points to a robust fingerprintCOMMENT
Structural Annotation Overuse4 hits · 8 pts
SeverityFileLineSnippetContext
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs59 // Step 1: Widen short -> intCOMMENT
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs63 // Step 2: Convert int -> floatCOMMENT
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs67 // Step 3: Store to destination (this is 16 lanes -> two Vector128<float> blocks)COMMENT
LOWsrc/ImageSharp/Compression/Zlib/Deflater.cs130 /// NOTE: This method can also return true when the streamCOMMENT
Verbosity Indicators3 hits · 7 pts
SeverityFileLineSnippetContext
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs59 // Step 1: Widen short -> intCOMMENT
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs63 // Step 2: Convert int -> floatCOMMENT
LOW…geSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs67 // Step 3: Store to destination (this is 16 lanes -> two Vector128<float> blocks)COMMENT
Overly Generic Function Names1 hit · 1 pts
SeverityFileLineSnippetContext
LOWtests/ImageSharp.Tests/Formats/Jpg/pdfjs/jpg.js1166 getData: function getData(width, height, forceRGBoutput) {CODE