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StillQuality Enumeration

Summary

Defines the compression quality factors affecting CMP still images.

Syntax

C++

public enum StillQuality

Public Enum StillQuality

public enum class StillQuality

Members

Value	Member	Description
0xFFFFFFF7	MC	Maximum compression. This option gives maximum compression. It is equivalent to a Q factor of 255.
0xFFFFFFF8	MCQ	Maximum compression keeping quality. This option provides maximum compression while maintaining as high as possible image quality.
0xFFFFFFF9	SQT	Size more important than quality (less tiling). This option produces less tiling in the image than the previous options. However, it can distort text or straight lines. It is a good option for image database applications.
0xFFFFFFFA	SQS	Size more important that quality (sharp). This option is recommended for images that have sharp edges. For example, an image that has a text overlay or an image with many straight lines. While it creates a larger file than the next option, it retains better edges
0xFFFFFFFB	QS	Quality and size equally important. This option provides the highest compression while maintaining good image quality. Try this option first, then move up or down the list accordingly to obtain acceptable compression size and image quality.
0xFFFFFFFC	QMS	Quality more important than size. While more colors are removed, most of them are colors or shades that are close to one another. The compressed image will appear very much like the original image. It will take some study to see the difference.
0xFFFFFFFD	QFS	Quality far more important than size. This option removes colors not noticed by the human eye. Most viewers cannot tell the difference between an image compressed at this level and the original image.
0xFFFFFFFE	PQ2	Perfect quality 2. This will produce a smaller file size than PQ1 while maintaining similar quality.
0xFFFFFFFF	PQ1	Perfect quality 1. This option compresses all colors of a 24-bit file and maintains the quality of the original image at a smaller file size. As the name suggests, there is no visual loss of color at this setting.

Remarks

The quality factor can be specified when saving an image file to the LEAD (CMP) format, or one of the JPEG still image formats. The quality factor (Q factor) is a number that determines the acceptable degree of loss in the compression process. Values can be set from 2 to 255, where 2 is the highest quality and 255 is the most compressed.

Requirements

Target Platforms

Reference

Leadtools.MediaFoundation Namespace

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Help Version 20.0.2020.4.2

Leadtools.MediaFoundation Assembly

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Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies