Given the following image:

I need to output this image:

I want to increase the size of Black Pixels in the image using C# or AForge.Net
Given the following image:

I need to output this image:

I want to increase the size of Black Pixels in the image using C# or AForge.Net
The image processing operation you need is morphological dilation or, in your case with black dots on white background morphological erosion.