In addition to the excellent recommendations by @Zeashan and @Wiam, I highly recommend

D.M. Etter. Engineering Problem Solving with Matlab, Prentice-Hall, 2nd Ed.

http://www.researchgate.net/publication/246069781_Engineering_Problem_Solving_with_MATLAB

I recommend this book because Delores Etter's introduction is very detailed with lots of examples for someone just beginning the use of Matlab.     A source of tutorials is available at

http://www.fen.bilkent.edu.tr/~guven/phys371/matlab.html

An excellent, very detailed introduction to image processing (with minimum programming required) is available from Wolfram:

http://www.wolfram.com/solutions/industry/image-processing/

I recommend Mathematica because it is very easy to use and is accompanied by a multitude of helpful demonstration programs, available at

http://www.wolfram.com/cdf/

And for a collection of web sites that focus on image processing, see

https://www.hal.t.u-tokyo.ac.jp/~pasqual/image.html

Article Engineering Problem Solving with Matlab

Hi, 

I would recommend you:

"Fundamentals of Digital Image Processing" by (Chris Solomon and Toby Breckon).

"Digital Image Processing Using Matlab" by (Rafael Gonzalez, Richard Woods and Steven Eddins).

In addition to the excellent recommendations by @Zeashan and @Wiam, I highly recommend

D.M. Etter. Engineering Problem Solving with Matlab, Prentice-Hall, 2nd Ed.

http://www.researchgate.net/publication/246069781_Engineering_Problem_Solving_with_MATLAB

I recommend this book because Delores Etter's introduction is very detailed with lots of examples for someone just beginning the use of Matlab.     A source of tutorials is available at

http://www.fen.bilkent.edu.tr/~guven/phys371/matlab.html

An excellent, very detailed introduction to image processing (with minimum programming required) is available from Wolfram:

http://www.wolfram.com/solutions/industry/image-processing/

I recommend Mathematica because it is very easy to use and is accompanied by a multitude of helpful demonstration programs, available at

http://www.wolfram.com/cdf/

And for a collection of web sites that focus on image processing, see

https://www.hal.t.u-tokyo.ac.jp/~pasqual/image.html

Article Engineering Problem Solving with Matlab

Hello Rhenan, You can ask more about  Digital Image Processing (biological images)  dr. Ion Andronache (https://www.researchgate.net/profile/Ion_Andronache3).

He has a article about it. 

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