calculate color mask

[Madhubalan]

Hi,

    How to calculate color mask image using the dominant color of the input image?

Thank you

[alexderjuengere]

hi,

please define "color mask", this expression sounds a little like a shampoo

might it be you meant color ramp or color gradient ?

EDIT: yep, regarding your other post at https://forums.ni.com/t5/Machine-Vision/Dominant-color-and-color-mask/m-p/2460752#M38960

, you're looking for a gradient

[alexderjuengere]

here's a quick and dirty draft. the "color ramp array"  contains all colors which occur in the input image

now, implement an algorithm to get the dominat colors from the color ramp array!

[Madhubalan]

Hi alexderjuengere,

                           I am using the same techniques used in the pdf(attached) to calculate the color mask using dominant color.

In the above posted file your are using .png file as input,but i am using .bmp image file as an input image.so i used k-mean clustering to find the dominant color.   

[Madhubalan]

Hi alexderjuengere,

                            In the attached pdf(previous post).In fig.5(b),color mast image.Using the k-mean clustering i could able to find the dominant of the input image,but can you help in getting the same output as shown in fig.5(b).

i ahve attached the vi file to determine the dominant color.

Thank you

[alexderjuengere]

In the above posted file your are using .png file as input,but i am using .bmp image file as an input image

on the same palette there's also a "read from bmp.vi" - you can change it directly with the "read from png.vi" that I used in the snippet.

In the attached pdf(previous post).In fig.5(b),color mast image.Using the k-mean clustering i could able to find the dominant of the input image,but can you help in getting the same output as shown in fig.5(b).

what's a "color mast image" supposed to be?

is a "color mast image" a binary image?

I don't have the Vision Toolkit, so please let's work with this:

 

Regards,
Alex

[Madhubalan]

Hi alexderjuengere,
I think it is color mask image, they typed it wrongly as mast.The flow chart in the PDF says it as color mask image.
color mask image is a binary image.

From what I understood from that pdf about color mask image is after finding the dominant color from the input image,i.e top 80 percentage of the color histogram is considered as dominant color and then color mask is set 1, if the input image color is included in the dominant color

Thank you.

[alexderjuengere · Accepted solution]

So, you use the "dominant color" as a threshold for segmentation.

[Madhubalan]

Hi alexderjuengere,

                            Yes,dominant color is used.my task is similar to the task in that pdf,in that they will finally mark the printer as the target object,in my work i have to mark the screw as the target object.

I have attached the my input image.

Thank you

[alexderjuengere]

that's an interesting project!

feel free to post your code when you'll have another question