chopp textline in image using histogram in C#

See more:

C#

.NET

image-processing

Hello ,
I am developing text segmentation program in C# , I want to use histogram to segment text. can anybody help how I can use histogram from aforge library
and want to chop according threshold . The image is black and white.
Still I developed only -

verticalIntensityStatistics verticalintensity = new VerticalIntensityStatistics(bitmap);

Histogram histogram = verticalintensity.Gray;

now how can chop text where histogram vally goes below threshold and make changes in orignal image.

also I want to display this histogram on chart.