A. Load and Save
A.01. Loading and Saving ImagesA.02. JPEG FormatA.03. Lossless JPEG TransformsA.04. TIFF FormatA.05. TIFF Extra ChannelsA.06. PNG FormatA.07. BMP FormatA.08. GIF FormatA.09. Animated GIFA.10. WebP FormatA.11. RAW FormatA.12. Extract TIFF Preview from EPSA.13. Writing EPS and PDFA.14. TGA FormatA.15. PNG NeuQuant
B. Filters and Transforms
B.01. ResizeB.02. Rotate, FlipB.03. CropB.04. Brightness, ContrastB.05. AutorotateB.06. TintB.07. Advanced Tone CorrectionB.08. Color AdjustmentB.09. Minimum, Maximum, MedianB.10. Bezier
C. Drawing
C.01. Line, Rectangle, EllipseC.02. Matrix TransformC.03. Graphics PathC.04. Clipping PathC.05. Draw ImageC.06. Artistic Frame
D. Font and Text
D.01. Plain and Bounded (Multiline) TextD.02. Font Loading and Text MeasuringD.03. Art TextD.04. Double Path TextD.05. WatermarkD.06. PDF and EPS OutputD.07. Formatted TextD.08. Paragraphs and ListsD.09. Text Flow Control
E. Color Management
E.01. Converting Pixel FormatsE.02. CMYK, Grayscale to RGBE.03. RGB to CMYKE.04. Color ProfileE.05. Color Management EnginesE.06. ChannelsE.07. Converting Color ValuesE.08. Lab Color SpaceE.09. Color ProofingE.10. Device Link Profile
F. Metadata
F.01. EXIF and IPTCF.02. Thumbnail from EXIFF.03. XMPF.04. Adobe Image Resource BlocksF.05. Clipping PathF.06. Preserving Metadata
G. Large Images (Memory-Friendly Pipeline API)
G.01. Resize, Rotate, CropG.02. DrawingG.03. Pipeline API SyntaxG.04. Multiple ReceiversG.05. Multiple SourcesG.06. Progress and CancelG.07. Split Image into Tiles
H. Green Screen Removal
H.01. Green Screen Removal
I. PSD Format (Adobe Photoshop)
I.01. Merge and ResizeI.02. Modify and Merge LayersI.03. Curved TextI.04. Render TemplatesI.05. Create 3D Preview
K. Web
K.03. Zoomable Image
L. Misc
L.01. System.Drawing InteroperabilityL.02. Batch Resize Using PowerShellL.03. InnoSetup Installer
  1. Demos & Samples
  2. Load and Save

PNG NeuQuant

Demonstrates how to reduce 24-bit colors to 8-bit using NeuQuant algorithm and save the result to PNG. Comparing to classic color quantization algorithms, NeuQuant provides much better quality and preserves alpha channel, scarifying the performance.

Download Trial

To run this sample in Visual Studio, install the Graphics Mill trial and open the Aurigma.GraphicsMill.sln solution in the Samples folder. Find the sample in this project:

A. Load and Save → A.15. PNG NeuQuant

indexed+4loading+15neuquantpalette+3png+1saving+10web optimization+5

Code snippet

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