Undefined function 'taylor' for input arguments of type 'uint8'. je peut pas vraiement comprendre c'est quoi l'erreur ?

    img=imread('img1.jpg');
[m,n,p]=size(img);
if p==3
    img=rgb2double(img);
end 
for i=1:m 
    for j=1:n
    a=img(i,j);
    taylor(img,a);
    end
  end

[Walter Roberson]

What are you expecting the call to taylor() to do?

[amal abbbes]

i want to get the Coefficent of the Taylor of the img1 in ech point of image

[Stephen23]

taylor is a function in the Symbolic Math Toolbox, and its first input must be a symbolic expression/function/..., while the second must be a symbolic variable. What do you expect from the function when you provide numeric arrays?

[Walter Roberson]

Are you trying to calculate moments of the image?

[amal abbbes]

i want to compare the coefficent with an threshold in order to eliminates same pixel

[Walter Roberson]

You will need to find a different approach. taylor analysis is not defined for numeric arrays.

[amal abbbes]

thanks for your help Walter,i will search another approach

Answer 1

[nima aalizade]

taylor analysis is not defined for numeric arrays.

Answer 2

[Walter Roberson]

A truncated taylor series can be viewed as a polynomial fitting.

Hypothetically, you could model an image by declaring it to be a surface in X and Y, and then doing a multinomial fit to it, and then replacing the image with the values projected by the multinomial.

In practice: this is likely to work very very poorly.