How does Image namespace is structured?

Definition and implementation of pixel and image classes

Pixels definitions
Images definitions

Pixel definitions

Files: Pixels.h, Pixels.inl, Pixels.cpp, Pixels_ColorSpace.inl.

Pixels.h

Definitions of EPixelMode, EColorSpace, EPixelType, EPixelFormat and some associated services :

elxGetResolution, elxGetPixelMode, elxGetPixelType, elxGetColorSpace,
elxGetChannelCount, elxSizeofPixel, elxHasAlpha, elxGetPixelFormat, elxToString.

Definition of all template pixel structs:

PixelL< T >, PixelLA< T >, PixelComplex< T >, PixelRGBA< T >,
PixelRGB< T >, PixelHLS< T >,
PixelXYZ< T >, PixelLuv< T >, PixelLab< T >, PixelLch< T >, PixelHLab< T >.

Naming all suitable pixel types:

PixelLub, PixelLus, PixelLi, PixelLf, PixelLd,
PixelLAub, PixelLAus, PixelLAi, PixelLAf, PixelLAd,
PixelComplexi, PixelComplexf, PixelComplexd,
PixelRGBub, PixelRGBus, PixelRGBi, PixelRGBf, PixelRGBd,
PixelHLSf, PixelHLSd,
PixelXYZf, PixelXYZd,
PixelLuvf, PixelLuvd,
PixelLabf, PixelLabd,
PixelLchf, PixelLchd,
PixelHLabf, PixelHLabd,
PixelRGBAub, PixelRGBAus, PixelRGBAi, PixelRGBAf, PixelRGBAd.

Pixels.inl

Implementation of GetPixelFormat for all pixel specializations.

Pixels.cpp

Implementation of global services defined in Pixel.h.
Instantiations of all pixel types.

Pixels_ColorSpace

Implementation of all pixel copy constructor from other pixel types.

Image definitions

Files: AbstractImage.h, AbstractImage.inl,
ImageImpl.h, ImageImpl.inl,
ImageVariant.h, ImageVariant.inl, ImageVariant.cpp.

What are the differences between image classes?

AbstractImage define an generic pixel container at low level. It can't be instanciate as it has pure virtual methods. It allows to use image object where pixel format is known at runtime.

ImageImpl is the template class that implements AbstractImage at low level. This is a specialized pixel container that can be instanciate. It has data descriptions and accessors but no processing method.

ImageVariant is an high level image definition. It uses the bridge pattern to hide the implementation of the AbstractImage class for clients. Image variant pixel format is known at run-time and can change during his life cycle. It's also an wrapper for all AbstractImage services. It introduces the color field array concept (Bayer matrix).