Keep working

I expect every one of you is going forward with the assignments.There are some more confusing terms you will encounter while doing the assignments, let me give some details

1. Step - A step is the number of column pixels present in an image.So for every step, the height of the image increases by one step
2. Components - They are equivalent to channels, so for an RGB image, there are 3 components (Red, Green, Blue) and for a grey scaled image, there is 1 component (White)
3. Resolution - This is the dimension of the image, in simple terms it is number of row pixels / number of column pixels

Also  this is one of the links that I forgot to give, it gives the best possible documentation for openCV

http://www710.univ-lyon1.fr/~bouakaz/OpenCV-0.9.5/docs/ref/OpenCVRef_ImageProcessing.htm

You can hack the code given in the below link to perform display histograms

http://xa.yimg.com/kq/groups/1986690/1513778415/name/cvHistogram.c

Keep going forward with enthusiasm and curiosity, I have a time frame for this blog to complete the tutorial in the next 25 posts, but I may take a leave in the middle after the 30th of this month for 20 days, will try to complete it before that.I want to take you people till face recognition and leave you there for furthur research

Coding - Image Processing

I hope you already did the Hello World programme mentioned in the previous to previous post.For today, I will give you some assignments, try to do them.Take help of openCV documentation and the Hello World programme you had already written.Try to use the already available functions in openCV library as much as you can

Orginal Color Image

1.Make a color image into a grey scale image

Grey scale Image

2.Produce a negative of an image (Already over - helloworld)

Negative Image

3.Make a grey scale image, pure black and white (You can use the hint I mentioned in the previous post)

4.Apply patches of 4 different colors to an images

Patched Image

5.Calculate the mean, variance and standard deviation of the image

6.Create the histogram of an image, it should be printed as a seperate image

Blue Pane

Green Pane

Red Pane

Histogram is a graph, which plots the intensity of a color versus all the pixels in the image.It shows the intensity of that color at every pixel value of the image.So for an RGB image there will be three different histograms each corresponding to a different color and for grey scale only one.

If you have any doubts post them in the comments section and I am giving you three days of time to accomplish these tasks, meet you again on Tuesday