median_rect.hdev加強圖像對比，去除不良結果影響 相關例程學習

Index:.../Filters/Smoothing/median_rect.hdev

median_rect (ImageAngio, ImageAngioMedian, 61, 61)
min_max_gray (ImageAngioMedian, ImageAngioMedian, 0, Min, Max, Range)
sub_image (ImageAngio, ImageAngioMedian, ImageAngioEnhanced, 3, 3 * Min)

median_rect (ImageNeedle, ImageNeedleMedian, 41, 41)
dyn_threshold (ImageNeedle, ImageNeedleMedian, Region, 30, 'dark')

就這麼兩套代碼，簡單實用。

處理效果如圖。