Figure 5

Effect of mean filtering and mean filter sizing on RGB image and thresholding. Figure 5a-d show the addition of a pre thresholding smoothing step affects the subsequent thresholding operation. Figure 5a shows the binary mask created by the thresholding operation without smoothing, while Figure 5b, c and d show the binary mask when the smoothing step is done using a 9×9, 29×29 and 49×49 sized filter. Figure 5e shows an RGB image and 5f shows the same image once it has been smoothed with a 29×29 filter, the filter has the effect of blurring minor variation within the tissue types.