Question about Color histogram plot

Question

Portgas Ace 2014-8-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/151067-question-about-color-histogram-plot

评论： Image Analyst 2014-8-16

createColorHistograms.m

So im trying to modify the code here:

http://www.mathworks.com/matlabcentral/fileexchange/20757-drawing-color-histograms-and-color-clouds

My modified code is attached to this question.

my problem is that the color in my histogram plot is not according to color. It does not have a sequence of color since the black bar is near the center when it is supposed to be at the right most.

Original image is:

Histogram of the image is:

Also, follow up question. How can i extract using the histogram plot a specific boundary of color. Like example i want to extract from the original image the pixels with yellowish color. How can i do that? Thank you so much!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2014-8-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/151067-question-about-color-histogram-plot#answer_148811

It's best if you ask the author about why his program behaves that way. Are you sure the function expects a 3D color image?

I have several color segmentation routines in my File Exchange to help you with 'i want to extract from the original image the pixels with yellowish color" http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862