SaveJPEGChromFactor Property

Description

Gets and sets the chrominance quality setting for saving JPEG, TIFF-JPEG, and ePIC files.

Property Type

Read-write property

Syntax

Visual Basic
Public Property SaveJPEGChromFactor As Integer

Return Type

The chrominance quality setting for saving the file.

Valid values range from 0 to 255, with a value of zero meaning no compression (and hence, maximum color quality) and 255 meaning maximum image color compression (and hence, minimal image color quality).

The default setting of Chrominance = 10.

Remarks

JPEG and ePIC images are stored in a compressed format. Compression is lossy which means when saving JPEG or ePIC files, there will be data loss.

Data loss is the result of JPEG and ePICs ability to achieve high compression ratios. Higher quality settings result in less compression, while lower quality settings result in higher compression.

Quality versus compression is a tradeoff. Adjust image compression ratio by setting the Luminance and Chrominance properties. The Luminance property adjusts the luminance or gray scale quality, while the Chrominance property adjusts the chrominance or color quality.

Lower settings for these properties result in higher quality images with less compression.
Higher settings for these properties result in lower quality images with more compression.

For general use photographic type images, the default settings of Luminance = 24 and Chrominance = 30 provides about a 12:1 image compression ratio with minimal data loss. Compression ratios and perceived image quality will vary depending on the image.