QualityFactor Property (original) (raw)
Summary
Gets and sets the Quality Factor (QFactor) to use when saving WebP images (single-frame or animation).
Syntax
C#
Objective-C
C++/CLI
Java
Python
public int QualityFactor { get; set; } @property (nonatomic, assign) NSInteger qualityFactor; public int getQualityFactor()
public void setQualityFactor(int value)
public:
property int QualityFactor {
int get();
void set ( int );
}
Property Value
The Quality Factor to use when saving WebP compressed images.
| Value | Description |
|---|---|
| 0 | Lossless JPEG |
| 1 | Highest quality |
| 2-254 | The lower the value, the higher the quality. The higher the value, the higher the compression. The default value is 20. |
| 255 | Highest compression |
Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void TestSaveWebpExample()
{
// This example saves 3 files with various stamp settings and quality factors
string srcFile = Path.Combine(LEAD_VARS.ImagesDir, @"sample1.cmp");
string dstFile = Path.Combine(LEAD_VARS.ImagesDir, @"out-");
using (RasterCodecs codecs = new RasterCodecs())
using (RasterImage image = codecs.Load(srcFile, 1))
{
// CodecsWebpOptions & CodecsWebpSaveOptions reference
codecs.Options.Webp.Save.SaveWithStamp = true;
codecs.Options.Webp.Save.StampBitsPerPixel = 24;
codecs.Options.Webp.Save.QualityFactor = 20;
codecs.Options.Webp.Save.StampWidth = 160;
codecs.Options.Webp.Save.StampHeight = 120;
// this file should have a stamp that is 160x120
codecs.Save(image, dstFile + "stamp160x120-q20.webp", RasterImageFormat.Webp, 0);
// this file should have a stamp that is 240x200
codecs.Options.Webp.Save.QualityFactor = 120;
codecs.Options.Webp.Save.StampWidth = 240;
codecs.Options.Webp.Save.StampHeight = 200;
codecs.Save(image, dstFile + "stamp240x200-q120.webp", RasterImageFormat.Webp, 0);
// this file should have no stamp
codecs.Options.Webp.Save.SaveWithStamp = false;
codecs.Options.Webp.Save.QualityFactor = 0;
codecs.Save(image, dstFile + "NoStamp-lossless.webp", RasterImageFormat.Webp, 0);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
Leadtools.Codecs Assembly
CompactFile(Stream,Stream,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(Stream,Stream,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method
CompactFile(string,string,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(string,string,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method