RangesSegmenter
RDO_Segmenter
ColorQRSegmenter
SplitChannelsSegmenter

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RangesSegmenter

Interface of image segmentation by color ranges.

This segmenter allows to extract from image to separated images all pixels with colors that fall within user defined ranges (or if it is required pixel that do not fall within these ranges). These ranges can be set by definition of lower and upper range boundaries:

<RangesSegmenter GetMasks="0">
<UsedColorSpace>RGB</UsedColorSpace>
<LowerBoundaries>0,0,0;130,55,80;219,200,130</LowerBoundaries>
<UpperBoundaries>128,128,128;209,190,190;255,255,191</UpperBoundaries>
</RangesSegmenter>

Property name	Description	Default value
UsedColorSpace	Colorspace of an image	RGB
LowerBoundaries	Lower boundaries of a range	0,0,0;127,127,127
UpperBoundaries	Upper boundaries of a range	128,128,128;255,255,255
GetMasks	Flag for masks	0

RDO_Segmenter

Segmenter for extracting layers from an image.

This segmentation procedure is based on article Cheng, H. and Bouman, C.A., 2001. Document compression using rate-distortion optimized segmentation. Journal of Electronic Imaging, 10(2), pp.460-475. But RDO_Segmenter is modification of algorithm from the article.

Parameters of this filter can be described in profile:

<ProcessingProfile>
...
<RDO_Segmenter> 
<ImageBlockSize>8</ImageBlockSize> 
<IsTextBinaryMaskRequired>true</IsTextBinaryMaskRequired>
<ThreshHigh>150.0</ThreshHigh>
<ThreshLow>25.0</ThreshLow>
<ThreshMean>200.0</ThreshMean> 
<DCTCoeff>400</DCTCoeff>
<ThreshVariance>25</ThreshVariance>
<IsDownsamplingRequired>false</IsDownsamplingRequired> 
<RatioForeground>4.0</RatioForeground>
<RatioBackground>2.0</RatioBackground>
</RDO_Segmenter>
...
</ProcessingProfile>

Property name	Description	Default value
ImageBlockSize	Size of image blocks for processing	8
IsTextBinaryMaskRequired	Flag for result layers filling	true
ThreshHigh	High threshold for the segmenter	150.0
ThreshLow	Low threshold for the segmenter	25.0
ThreshMean	Mean threshold for the segmenter	200.0
DCTCoeff	Threshold for discrete cosine transform	400
ThreshVariance	Variance threshold	25
IsDownsamplingRequired	Flag for optional background and foreground downsampling	false
RatioForeground	Scale factor for foreground downsampling	4.0
RatioBackground	Scale factor for background downsampling	2.0

ColorQRSegmenter

Segmenter for extracting layers from a QR RGB image (experimental). It only accepts 1 input image, and outputs 3 images, one per channel.

Parameters of this filter can be described in profile:

<ProcessingProfile>
...
<ColorQRSegmenter>
 <IsTextBinaryMaskRequired>true</IsTextBinaryMaskRequired>
</ColorQRSegmenter>
...
</ProcessingProfile>

Property name	Description	Default value
MaxSide	Longest side for rescaling	0
CleanBackground	If enabled it attempts to clean the background	false
Blur	If enabled it will execute blurring	false
Sharp	If enabled it will add a sharp filter	false
HueDiscretization	If enabled it will use HUE discretization to process the image	false
Grayscale	If enabled, final image will not be binarized	false

SplitChannelsSegmenter

This segmenter allows to separate multichannel image to few grayscale images with one channel.

There are no parameters for this segmenter.