Interpretation of color histogram











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I'm reading a paper about image processing and came across this color histogram:
image. But I'm not sure how to interpet it. The 3 different curves are for red, green and blue. But what is on the X and Y-axis? My guess would be X-axis going from 0 to 255 for the 'intensity' of the color and Y-axis the amount of pixels in the image that have this intensity. Could anyone confirm this or correct me if I'm wrong?










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  • Not an expert here but your interpretation sounds about right.
    – XDS
    Nov 10 at 19:43















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I'm reading a paper about image processing and came across this color histogram:
image. But I'm not sure how to interpet it. The 3 different curves are for red, green and blue. But what is on the X and Y-axis? My guess would be X-axis going from 0 to 255 for the 'intensity' of the color and Y-axis the amount of pixels in the image that have this intensity. Could anyone confirm this or correct me if I'm wrong?










share|improve this question







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user406406406 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • Not an expert here but your interpretation sounds about right.
    – XDS
    Nov 10 at 19:43













up vote
1
down vote

favorite









up vote
1
down vote

favorite











I'm reading a paper about image processing and came across this color histogram:
image. But I'm not sure how to interpet it. The 3 different curves are for red, green and blue. But what is on the X and Y-axis? My guess would be X-axis going from 0 to 255 for the 'intensity' of the color and Y-axis the amount of pixels in the image that have this intensity. Could anyone confirm this or correct me if I'm wrong?










share|improve this question







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user406406406 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I'm reading a paper about image processing and came across this color histogram:
image. But I'm not sure how to interpet it. The 3 different curves are for red, green and blue. But what is on the X and Y-axis? My guess would be X-axis going from 0 to 255 for the 'intensity' of the color and Y-axis the amount of pixels in the image that have this intensity. Could anyone confirm this or correct me if I'm wrong?







image-processing






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asked Nov 10 at 17:44









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  • Not an expert here but your interpretation sounds about right.
    – XDS
    Nov 10 at 19:43


















  • Not an expert here but your interpretation sounds about right.
    – XDS
    Nov 10 at 19:43
















Not an expert here but your interpretation sounds about right.
– XDS
Nov 10 at 19:43




Not an expert here but your interpretation sounds about right.
– XDS
Nov 10 at 19:43












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If I know well, someone please correct me if I am wrong, the X axis represents the possible values of a color from either one of the RGB channels (a value in the [0-255] interval), and the Y axis represents the number of pixels having that value.






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  • This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
    – user406406406
    Nov 10 at 17:51










  • And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
    – Kuba Ober
    Nov 10 at 17:51











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1 Answer
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active

oldest

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1 Answer
1






active

oldest

votes









active

oldest

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active

oldest

votes








up vote
2
down vote



accepted










If I know well, someone please correct me if I am wrong, the X axis represents the possible values of a color from either one of the RGB channels (a value in the [0-255] interval), and the Y axis represents the number of pixels having that value.






share|improve this answer








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  • This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
    – user406406406
    Nov 10 at 17:51










  • And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
    – Kuba Ober
    Nov 10 at 17:51















up vote
2
down vote



accepted










If I know well, someone please correct me if I am wrong, the X axis represents the possible values of a color from either one of the RGB channels (a value in the [0-255] interval), and the Y axis represents the number of pixels having that value.






share|improve this answer








New contributor




Rakirnd is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.


















  • This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
    – user406406406
    Nov 10 at 17:51










  • And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
    – Kuba Ober
    Nov 10 at 17:51













up vote
2
down vote



accepted







up vote
2
down vote



accepted






If I know well, someone please correct me if I am wrong, the X axis represents the possible values of a color from either one of the RGB channels (a value in the [0-255] interval), and the Y axis represents the number of pixels having that value.






share|improve this answer








New contributor




Rakirnd is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









If I know well, someone please correct me if I am wrong, the X axis represents the possible values of a color from either one of the RGB channels (a value in the [0-255] interval), and the Y axis represents the number of pixels having that value.







share|improve this answer








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answered Nov 10 at 17:49









Rakirnd

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  • This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
    – user406406406
    Nov 10 at 17:51










  • And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
    – Kuba Ober
    Nov 10 at 17:51


















  • This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
    – user406406406
    Nov 10 at 17:51










  • And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
    – Kuba Ober
    Nov 10 at 17:51
















This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
– user406406406
Nov 10 at 17:51




This corresponds perfectly with the interpretation that is given of this histogram. Thanks.
– user406406406
Nov 10 at 17:51












And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
– Kuba Ober
Nov 10 at 17:51




And the counts are normalized for the peak in this particular histogram: the peaks are made the same, even though the actual peak counts of pixels may differ by quite a bit. Otherwise, the pixel count scales would be same for all colors, and the peaks would not appear at same height usually.
– Kuba Ober
Nov 10 at 17:51










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