C/C++ using open CV

[kumar2884]

Hi
I am engineering student, currently working in image processing.
I have big issue in understanding few basic concepts in programming. To be frank I am beginner, so my question will look silly, so please tolerate with me and if anyone can help me it would be much use full for me.

I started learning image Process using Matlab. it very easy using the Matlab function for ie : it need only one single line to open image. But my problem is I want to create the same algorithm in C or C++.

But if I want to create the same algorithm for mobile application I need to convert in to c or c++.But in c/c++ it will take 10 to 15 line for a single image open process.

So I am confused here can we use open CV and create the same mobile application? Or what is the use of open CV. And even I saw there are many different libraries for image processing, so I am confused in which way to go , what is the difference in all this libraries available out there and how to choose the right way for my need.

The below site give few sample http://www.xdp.it/cximage.htm

So please let me know, what is the difference between writing a program in C/C++, or using Open CV in C/C++ . Can we use both codes for creating application?

Thank You
kumar

[r.stiltskin]

The libraries provide functions that allow you to read and write image files and get easy access to the pixel data in a format that makes it easier for your programs to manipulate it. It let's you write code to analyze images, modify images, or produce your own images without worrying about how the data is formatted, compressed, etc., for storage in a file.

In addition to that, OpenCV also has many image processing functions built-in. Many of the algorithms that you want to learn are already implemented in OpenCV. Whether this is good or bad is up to you. You may find it helpful to see how your output is supposed to look, you may find it useful to be able to compare the running speed of your implementation with theirs, etc.

I'm not familiar with CxImage but based on a quick glimpse it looks like it would be very convenient for opening and writing many image formats. It seems to provide much less of the higher-level functionality than OpenCV but at the same time it's probably easier to use so it might suit your purposes very well.

If you only want to work with .bmp files, here's a link to something that I recently found, EasyBMP, which is very small and super easy to use but is only for bitmap files and it provides almost nothing in terms of image processing. All it does is get you easy access to the data in the image file -- you do all of the higher level processing in your own code.

[kumar2884]

Hi

Thank You, from your reply i was able to understand few thing, So when it comes to develop a new image processing techniques we can use Open CV in a much easier way and see the result in system and it reduces the time to develop a full set of code in 100 and 200 lines in C/C++.

But if we need to create a application for a particular device like mobile or digital camera we need to write in C or C++ with out using this libraries and it will take 100 to 200 likes depending up on our requirements is it right ?

So all this available libraries make our code easy and see the result immediately with out any difficulties in system...

OK once again thank You, if u can refer me a book that give the basic image processing idea, it will be help full, i don't want to use open CV , i want to learn pure image processing using C or C+++

Kumar

[dusktreader]

But if we need to create a application for a particular device like mobile or digital camera we need to write in C or C++ with out using this libraries and it will take 100 to 200 likes depending up on our requirements is it right ?

So all this available libraries make our code easy and see the result immediately with out any difficulties in system...
Kumar

I use OpenCV every day, and, yes, I think it is an awesome library. However, you should realize that using OpenCV introduces a large overhead because it is a very rich library. On my system, libcv.so ( the main OpenCV library ) takes up 10 MB of space.

If you are just opening the image ( especially if you know the data format ), it would probably be better to use a smaller library. Of course, if you really are doing image processing, it may be excessive to implement the algorithms yourself.

What types of images are you opening? With which algorithm are you processing the data?

[kumar2884]

Hi

Currently i am using Matlab, but i need to convert the matlab code to C/C++, So that it will be sue full for a mobile application.
But the problem is i am not sure where we can use Open CV for such application.

[dusktreader]

Hi

Currently i am using Matlab, but i need to convert the matlab code to C/C++, So that it will be sue full for a mobile application.
But the problem is i am not sure where we can use Open CV for such application.

I found this on google: http://alexkarpus.com/opencv/. Looks like using OpenCV for mobile devices is very doable.

Look at the OpenCV website, the OpenCV Yahoo User Group, and google in general for some good examples of how to use OpenCV.

[kumar2884]

Hi

Thank You for the link, it’s really nice , I will look into that and if I found anything interesting I will let you know.

[naveenture]

can we create forms like in vb using c. and can we use buttons,textboxes and all..