Image Blob Detection

The programmer will provide an algorithm to successfully detect blobs in an image and give the ability to remove blobs.? The programmer will be provided a few images that have smoke and trees.? The program should be able to identify the blobs and then remove the trees from the jpg image. Currently there is open source product but it needs to be able to be called from a C# application which would require the programmer to write a wrapper to the C++ code.