QualityFactor Property (original) (raw)
Summary
Gets and sets the Quality Factor (QFactor) to use when saving JPEG, LEAD CMP and other compressed images that support Quality Factor.
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 JPEG and LEAD CMP compressed images.
| Value | Description |
|---|---|
| 0 | Lossless JPEG |
| 2 | Highest quality; The default value is 2. |
| 3-254 | The lower the value, the higher the quality. The higher the value, the higher the compression. |
| 255 | Highest compression |
Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void CodecsJpegOptionsExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg");
// Get all Information about the Jpeg file that you want to load.
CodecsImageInfo imageInfo = codecs.GetInformation(srcFileName, true);
//Setting Jpeg Load options. CodecsJpegOptions & CodecsJpegLoadOptions reference
codecs.Options.Jpeg.Load.DisableMmx = false;
codecs.Options.Jpeg.Load.DisableP3 = false;
codecs.Options.Jpeg.Load.ForceCieLab = true;
codecs.Options.Jpeg.Load.ForceRgbFile = false;
codecs.Options.Jpeg.Load.IgnoreAdobeColorTransform = false;
codecs.Options.Jpeg.Load.UseBadJpegPredictor = false;
codecs.Options.Jpeg.Load.Multithreaded = true;
codecs.Options.Jpeg.Load.UseFastConversion = false;
RasterImage srcImage = codecs.Load(srcFileName);
//if the image has stamp then set the Jpeg settings related to the stamp.
if (imageInfo.Jpeg.HasStamp)
{
// Note, codecs.Options.Jpeg.Save.SaveWithoutTimestamp is deprecated. Use CodecsPngSaveOptions.SaveWithoutTimestamp instead.
// CodecsJpegSaveOptions reference
codecs.Options.Jpeg.Save.FixedPaletteStamp = true;
codecs.Options.Jpeg.Save.JpegStamp = true;
codecs.Options.Jpeg.Save.SaveWithStamp = true;
codecs.Options.Jpeg.Save.StampBitsPerPixel = srcImage.BitsPerPixel;
codecs.Options.Jpeg.Save.StampHeight = 100;
codecs.Options.Jpeg.Save.StampWidth = 100;
codecs.Options.Jpeg.Save.YccStamp = false;
}
if (imageInfo.Jpeg.IsLossless)
Debug.WriteLine("This is a lossless Jpeg Image");
else
Debug.WriteLine("This is not a lossless Jpeg Image");
if (imageInfo.Jpeg.IsProgressive)
codecs.Options.Jpeg.Save.Passes = 0;
codecs.Options.Jpeg.Save.CmpQualityFactorPredefined = CodecsCmpQualityFactorPredefined.Custom;
codecs.Options.Jpeg.Save.DisableMmx = true;
codecs.Options.Jpeg.Save.DisableP3 = true;
codecs.Options.Jpeg.Save.QualityFactor = 2;
codecs.Options.Jpeg.Save.SaveOldJtif = true;
codecs.Save(srcImage, Path.Combine(LEAD_VARS.ImagesDir, "jpeg1.jpg"), RasterImageFormat.Jpeg, srcImage.BitsPerPixel);
codecs.Options.Jpeg.Save.FixedPaletteStamp = false;
codecs.Options.Jpeg.Save.JpegStamp = true;
codecs.Options.Jpeg.Save.SaveWithStamp = true;
codecs.Options.Jpeg.Save.StampBitsPerPixel = srcImage.BitsPerPixel;
codecs.Options.Jpeg.Save.StampHeight = 75;
codecs.Options.Jpeg.Save.StampWidth = 50;
codecs.Options.Jpeg.Save.YccStamp = true;
codecs.Options.Jpeg.Save.CmpQualityFactorPredefined = CodecsCmpQualityFactorPredefined.MaximumQuality;
codecs.Options.Jpeg.Save.DisableMmx = false;
codecs.Options.Jpeg.Save.DisableP3 = false;
codecs.Options.Jpeg.Save.SaveOldJtif = false;
codecs.Save(srcImage, Path.Combine(LEAD_VARS.ImagesDir, "jpeg2.jpg"), RasterImageFormat.Jpeg, srcImage.BitsPerPixel);
// Clean up
srcImage.Dispose();
codecs.Dispose();
}
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