MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 86)

5 Acquiring Image Data

5-8

Format Frame Types

Signed 16- and 32-bit formats; both little-endian and big-endian;

in regular and flip formats.

Floating-point and double formats; both little-endian and big-

endian formats; in regular and flip formats.

Color 8-, 24-, 32-, and 48-bit RGB formats; both little-endian and big-

endian; regular and flip; packed and planar (see “Understanding

Packed and Planar Formats” on page 5-8).

Frame types that specify the order of the bytes of color data (RGB

or GBR) and specify where the blank byte is located (XRGB or

XGBR).

Formats that represent colors in 4-bits (4444), 5-bits (555), 5- or 6-

bits (565), or 10-bits (101010).

Formats that use the YUV color space.

Suggested Algorithm

Your adaptor's getFrameType() function must return the appropriate frame type that

describes the data returned by your device for the specified format.

If your device supports multiple color formats, you do not need to expose all the formats

to toolbox users. You can simply provide one color format and handle the low-level details

in your adaptor with FRAMETYPE.

Example

The following example shows a skeletal implementation of the getFrameType()

function. An actual implementation might select the frame type based on the format the

user selected.

virtual imaqkit::frametypes::FRAMETYPE getFrameType() const {

return imaqkit::frametypes::FRAMETYPE:MONO8;

}

Understanding Packed and Planar Formats

The adaptor kit IAdaptorFrame class defines many FRAMETYPE enumerations that

cover the many possible types of image data devices can return. For example, some

devices can return color images in packed or nonpacked (planar) formats. These formats

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MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guide de l'utilisateur Page 86