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ColorDetect[image,cspec]

returns a mask image representing regions in image with colors within the specified color region.

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Basic Examples  
Scope  
Applications  
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ColorDetect

ColorDetect[image,cspec]

returns a mask image representing regions in image with colors within the specified color region.

Details

  • ColorDetect is typically used to specify an image mask, including pixels within the color region.
  • Possible settings for the color specification cspec include:
  • colorcolors near color
    ColorsNear[color,d,…]explicit specification of colors near color

Examples

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Basic Examples  (1)

Use ColorDetect to compute an image region:

Wolfram Language code: ColorDetect[[image], RGBColor[0.40541765226970417, 0.5989489462507049, 0.9031254989108909]]

Use the region as an alpha channel:

Wolfram Language code: SetAlphaChannel[[image], ColorNegate[%]]

Scope  (3)

Compute the pixels in the color region:

Wolfram Language code: ColorDetect[[image], RGBColor[0.6989759246143588, 0.818080938661109, 0.9248021130489484]]

Specify a maximum color distance:

Wolfram Language code: ColorDetect[[image], ColorsNear[RGBColor[0.6989759246143588, 0.818080938661109, 0.9248021130489484], .2]]

Specify a custom function to compute the distance:

Wolfram Language code: ColorDetect[[image], ColorsNear[RGBColor[0.6989759246143588, 0.818080938661109, 0.9248021130489484], .05, "DeltaL"]]

Applications  (1)

Perform selective decolorization:

Wolfram Language code: img = [image];
Wolfram Language code: mask = ColorDetect[img, ColorsNear[Red]]
Wolfram Language code: ImageApply[Mean, img, Masking -> ColorNegate[mask]]
Wolfram Research (2019), ColorDetect, Wolfram Language function, https://reference.wolfram.com/language/ref/ColorDetect.html.

Text

Wolfram Research (2019), ColorDetect, Wolfram Language function, https://reference.wolfram.com/language/ref/ColorDetect.html.

CMS

Wolfram Language. 2019. "ColorDetect." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ColorDetect.html.

APA

Wolfram Language. (2019). ColorDetect. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ColorDetect.html

BibTeX

@misc{reference.wolfram_2026_colordetect, author="Wolfram Research", title="{ColorDetect}", year="2019", howpublished="\url{https://reference.wolfram.com/language/ref/ColorDetect.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_colordetect, organization={Wolfram Research}, title={ColorDetect}, year={2019}, url={https://reference.wolfram.com/language/ref/ColorDetect.html}, note=[Accessed: 12-June-2026]}