Mode menu

Convert to Grey Convert to Bayer Convert to Color Change Bayer Matrix Change Color space Low resolution (8-bit) Medium resolution (16-bit) High resolution (32-bit) Split channels Remove Alpha Channel

Convert to Grey

This command allows color images to be converted to grey.

Compute the luminance from the red, green and blue components: Green L = g Mean L = (r+g+b)/3 Desaturate L = (min(r,g,b) + max(r,g,b))/2 CCIR 601 L = 0.2989*r + 0.5866*g + 0.1145*b CCIR 709 L = 0.2125*r + 0.7154*g + 0.0721*b ITU L = 0.222*r + 0.707*g + 0.071*b

Code sources: include/elx/image/inl/Conversion/Grey.inl, include/elx/image/inl/Conversion/Color.inl

Convert to Bayer

Convert a RGB color image to Bayer image choosing the Bayer matrix pattern.

This is used to test the demosaicing algorithms from synthetized images.

Raw color filled array

Code source: src/Image/Bayer/CreateBayer.hpp

Convert to Color

Convert a gray or gray with alpha image to a RGB or RGBA image copying L plane in each planes.

From a gray+alpha image

Select how to handle the alpha plane

Not implemented by now, click OK

Result with keep alpha channel

Result with remove alpha channel

Result with remove alpha channel but blend it into other channels

Change Bayer Matrix

Change Color space

Change the color space of a color image.

Note that CIE Lab and HSL color spaces are stored in 32-bit float formats. So for RGB images from lower resolutions (8- and 16-bit) a resolution conversion is done first.

From an image with a Bayer matrix, you have to choose the demosaicing algorithm for the conversion to the RGB color space.

Code sources: src/Image/ColorSpace.cpp, Image/ColorSpace/RGB.hpp, Image/ColorSpace/HLS.hpp, Image/ColorSpace/CIE.hpp, src/Image/Bayer/

Low resolution (8-bit unsigned integer)

Change channel resolution to 8 bits unsigned integer.

This is available only for grey and RGB images with or without alpha channel.

Medium resolution (16-bit unsigned integer)

Change channel resolution to 16 bits unsigned integer.

This is available only for grey and RGB images with or without alpha channel.

High resolution (32-bit floating point)

Change channel resolution to 32 bits floating point.

This is available only for grey and RGB images with or without alpha channel.

Split Channels

A RGB image is splitted in red, green and blue planes:

Remove Alpha Channel

Apply alpha blending into other channels

Unmodify other channels