assigning value to image

how can i assign value to image ? for example i have image ('apple') and image ('banana') I want to give ('apple') value = 5 and I want to give ('banana') value = 8 then compare between these two image and choose the max value so how can i do it in matlab

Answer 1

[Stephen23]

Presumably you have more than two images, in which case using a structure might be the best solution:

A.apple = 5
A.banana = 8
A.coconut = 3

You can then refer get the maximum value of any elements that you want to:

max([A.apple, A.banana])

Note that you can also use dynamic fieldnames, eg:

A.('banana')

is the same thing as

 A.banana

Answer 2

[Image Analyst]

You need to develop an image classification algorithm to determine what's in the image. For example, just look at the dominant color and decide if it's an image of an apple or a banana. Then return the classification. Make a function for that, in pseudocode:

function theClass = ClassifyImage(rgbImage)
if main color = red
  theClass = 5
else if main color = yellow
  theClass = 8
end

and so on. Then you can do the comparison you want with the values. I have several color classification tutorials in my File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862