How to filter an RGB image and transform into an BW one [closed]

How to filter an RGB image and transform into an BW one [closed]

References

Reference NO 1

http://stackoverflow.com/questions/15165951/how-to-filter-an-rgb-image-and-transform-into-an-bw-one

Reference NO 2

http://www.mathworks.com/matlabcentral/answers/65522

Reference NO 3

http://www.gimp.org/tutorials/Color2BW/

Reference NO 4

http://answers.opencv.org/question/8322/how-to-filter-an-rgb-image-and-transform-into-an/

Reference NO 5

http://www.planetary.org/explore/space-topics/space-imaging/tutorial_rgb_ps.html

Reference NO 6

http://www.photoshopessentials.com/essentials/rgb/

Reference NO 7

http://www.getreuer.info/tutorials/matlabimaging

Reference NO 8

http://www.johndcook.com/blog/2009/08/24/algorithms-convert-color-grayscale/