how to choose which is best

hi I have extracted the features of image such as colour ,shape and texture,no i have to apply a technique to select which is best from colour shape or texture,can anyone tell which technique or algorithm to apply please

Answer 1

[Walter Roberson]

The most important technique is to mathematically define what you mean by "best" in this context. Without a mathematical definition for your situation, you are not going to be able to resolve this.

[FIR]

walter in my point of view,i have extracted features of image,some features may be difficult to compare with the same feature of query image,some may be easy to compare which will produce exact result ,for image retrival.So i want to select the feature will can be compared easily with the query image feature for image retrival...sorry walter i dont have any idea about mathematical definition,please help

[Walter Roberson]

This is something you must decide for yourself. "best" is always relative to the exact mathematical definition of the comparisons you are performing. If you do not have an exact mathematical definition, you must invent one yourself.

If technique A takes T times as long as technique B, but technique A is M times more accurate than technique B but only P% of the time, then which of the two is "best" ?

If you have two or more factors to consider (such as time and accuracy), and 3 or more candidates, then mathematical voting theory shows that there are situations in which it is impossible to find a single winner (i.e., a "best")

[FIR]

ok Walter i am blank in this at present no idea,you please suggest what to do

[Walter Roberson]

Did you create the requirement of "best", or did someone else? If you are the one who created that requirement, then change the requirements until you get something that you can mathematically define. If someone else created that requirement, go back to them and talk to them about what is required.

I have no algorithms to suggest to you: you have asked for something that does not have a meaning. Your question is like asking "What is best, pizza, beer, or chocolate?"

[FIR]

ok walter i will come back to you after defining the meaning for best

Answer 2

[Jan]

It is impossible to give you a valid suggestion. It depends on the input and the wanted output, but you did not define them exactly.

Currently your question is equivalent to: "I have different sets of numbers. Which one is the best?"

Using the Buddha Toolbox, the answer will be:

The one with the smallest information (maximum entropy), because there is no information at all.

[FIR]

Jan i have posted it ,ok ,in other way i have image features formats stores in cell in .mat file

[1x30 double] [1x60 double] [1x30 double]

[1x30 double] [1x30 double] [1x30 double]

[1x30 double] [1x30 double] [1x30 double]

from these is it able to find which is best,these are the output of three different images,where each row represents extracted features of colour,shape,texture

[Jan]

@FIR: There is still no definition of "best". You have to start from a mathematical definition of "good". If you build the gradient over this expression, you will find the defition of "better". And at the points, where "better" is zero, you get either the "best" or "worst" images.