Enhancement of Digitized Mammograms Using a Local Thresholding Technique
Kevin S. Woods, Laurence P. Clarke, Robert P. Velthuizen · 2005
In this paper, a local threshdding technique is used to improve the contrast of dighzed mammograms. Dighzed mammograms cannot be segmented using a sngle threshold value due to their lack of contrast. There is also a degredatm of image quality, speafdly in conlrast, when a mammogram is dgitrzed. The technique presented here deals wdh these problems by calculaling a threshold value for each pixel in the image based on the intensibes of the neighbonng puels in a wndow. The contrast of the image is improved by darkening those pxels which fall bebw the threshold After an image is processed uang this algonthm, the resubng image can be easily segmented using a single threshdd value. Th~s method could also be used on other images wdh smilar characterisbcs as those of the digibzed mammograms.