Plotting in C++

1)  Plotting of graphs in C++
Soft Integration's Ch
http://www.softintegration.com/docs/ch/plot/

2) wxMathPlot
http://wxmathplot.sourceforge.net/

3) Qt

4) GNUPlot

5) GNUPlot++

6) Gigasoft Charting Library

7) VTK
http://www.vtk.org/

8) MathGL

9) DISLIN
http://www.mps.mpg.de/dislin/

Signal Processing Library in C++

1. Signal Processing Library in C
http://www.numerix-dsp.com/siglib/examples/

Intermediate C++

Video Lectures:
http://videolectures.net/stanfordcs106bw08_schwarz_lec27/

Books:
C++ Cookbook
C++ Gotchas (Stephen Dewhurst)
Imperfect C++: Practical Solutions for Real-Life Programming (Matthew Wilson)

Image Processing using C++ (Learning Resources)

Video Lectures
--------------

Image Processing using C
https://engineering.purdue.edu/~bouman/ece637/notes/
https://www.youtube.com/watch?v=uJvqbZtGIh4

Tutorials
---------

1.A good starting tutorial for image processing in c++
http://www.dreamincode.net/forums/topic/76816-image-processing-tutorial/

2. A good website on image processing algorithms to work on
http://www.imageprocessingplace.com/root_files_V3/tutorials.htm

4.http://ericscrosson.wordpress.com/2012/12/24/image-processing-in-cpp/

Books:
-----------

1. Concise Introduction to Image Processing using C++
http://www.amazon.com/Introduction-Processing-Numerical-Scientific-Computing/dp/1584888970

2. Digital Image Processing with C++ (available on web)
http://www.bmekmitl.org/index.php?option=com_content&view=article&id=63&Itemid=81

Learning C

If you want to learn C,

1) http://www.physics.drexel.edu/courses/Comp_Phys/General/C_basics/

2) 

Entry to C++:

If you are learning C++ for the first time. Here are some great website I found on web:

Tutorials
1) www.learncpp.com:
This is my favourite one. It is easy to understand

2) WiBit.net
Another great website with video explanations