Description

This property defines the quality of raster images. Possbile values of this property are integer numbers from 0 to 100.

Type

long (read/write)

Remarks

Value of 0 defines the lossless image quality (PNG-like compression).

Values from 1 to 100 define the lossy image quality (JPEG-like compression). Higher values provide higher image quality, the lower values provide lower size.

The default value for this property is 0 which means lossless compression.

Images can be represented in Flash format using Lossless (PNG-like) or Lossy (JPEG-like) image compression. Lossless image compression preserves the original quality of images but usually increases Flash file size. Lossy image compression usually provides higher compression rates especially for photorealistic images but decreases their quality. Non-photorealistic images such as graphs, charts, or sketches being compressed with the lossy algorithm lose their quality noteceably. That's why lossless algorithms are the most suitable for them. That's why we provide 2 options for image quality controlling.

There is so-called smart image compression technique available since FlashSpring Server 2.4 and FlashSpring Pro 3.0. FlashSpring analyses the content of raster images to determine whether they are photo-realistic or non-photo realistic and applies lossy or lossless image compression. This technique provides the best image quality as well as the reasonable file size.

Note: The smar image compression is automatically used when the ImageQuality property is set to 0 and the JpegImageQuality property is set to non-zero.

Example

The following example converts the presentation to solid Flash file using smart image compression..

Sub Sample()
    Dim fs As New FlashSpringAPI.FlashSpring
    fs.OpenPresentation "d:\temp\test.ppt"
    fs.Settings.Media.JpegImageQuality = 85
    fs.Settings.Media.ImageQuality = 0
    fs.GenerateFlash "c:\presentations", "myMovie.swf", OM_SOLID, "Standard"
    fs.ClosePresentation
    fs.ClosePowerPoint
End Sub

See Also

JpegImageQuality Property
GifImageQuality Property
MediaSettings Object