Update README.md

Author: ivancarras

README.md

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-![alt tag](https://github.com/ivancarras/color-quantification-firefly-algorithm/blob/master/lenna_reduction.PNG)
 # Color quantification using firefly algorithm
+![alt tag](https://github.com/ivancarras/color-quantification-firefly-algorithm/blob/master/lenna_reduction.PNG)
+
 Color quantification using firefly algorithm  
 The objetive of this project is the color image reduction through the firefly algorithm with the k-means. 
 You can change the fireflys number and the iteractions of k-means.