Orange Color isolate from the image

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Arch Man
Arch Man 2016-10-9
评论： Image Analyst 2016-10-10
Hello I am new in Image process can you help me please hoe can I isolate the orange color from the picture and show the orange component?

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回答（3 个）

Walter Roberson
Walter Roberson 2016-10-9
  2 个评论
Walter Roberson
Walter Roberson 2016-10-10
Display your image. Turn on the data cursor in the figure toolbar -- it is the one to the left of the paint-brush. Move the cursor to some points that you consider "orange" and notice the RGB values that are shown. Make sure that your code considers those pixels to be "orange".
Image Analyst
Image Analyst 2016-10-10
Here is a site you'll find interesting. http://colorthesaurus.epfl.ch/
It lets you click on a color in a palette and gives you the various names for it in different languages. Or you can type in the name and see the color and other names for it in other languages:

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Jakub Rysanek
Jakub Rysanek 2016-10-9
You can define a set of RGB codes that define "orange" color and then apply image thresholding like this:
% Load image from a file
img = imread('photo.jpg');
red_layer = img(:,:,1);
green_layer = img(:,:,2);
blue_layer = img(:,:,3);
% Define RGB code range for orange color
threshold_red = 255;
threshold_green = [130 165];
threshold_blue = 0;
% Apply thresholds
orange_pos = red_layer==threshold_red & ...
green_layer>=threshold_green(1) & ...
green_layer<=threshold_green(2) & ...
blue_layer==threshold_blue;
orange_pos gives you 0/1 indication of orange color per pixel.
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Image Analyst
Image Analyst 2016-10-10
You might have forgot to use [] in imshow(), or your image is not uint8 or in the valid range after your processing.
Walter Roberson
Walter Roberson 2016-10-10
Jakub's definition of "orange" relies upon Red exactly 255 and Blue exactly 0, and Green between 130 and 165. If the "orange" in Izziddin Banimenah's images happened to have Red 254 or Blue 1, then Jakub's code would not find those regions. This is not a bug in Jakub's code: it is a problem with the meaning of "orange" not being specified by Izziddin Banimenah.

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Image Analyst
Image Analyst 2016-10-9
Try the color thresholder app on the Apps tab of the tool ribbon. Or else see my File Exchange for color segmentation demos. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

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