constrast enhancement for browser image

pkg/producer/jpg.go

@@ -60,8 +60,12 @@ func GTiffToJPG(ftiff, fjpg string, reversed bool) error {
 	channels := gocv.Split(img)
 	for i, ch := range channels {
 		switch config.GCONFIG.BrowserImg.Enhancement {
-		case NoEnhancement:
-		case StretchToMinimumMaximum:
+		case StretchToCumulativeCutMinMax:
+			channels[i] = cumulativeCountCutEnhancement(ch,
+				config.GCONFIG.BrowserImg.CumulativeCutLower,
+				config.GCONFIG.BrowserImg.CumulativeCutUpper)
+			ch.Close()
+		default:
 			minVal, maxVal, _, _ := gocv.MinMaxLoc(ch)
 			ce := NewContrastEnhancement(int(minVal), int(maxVal))
 			for y := 0; y < height; y++ {
@@ -71,12 +75,8 @@ func GTiffToJPG(ftiff, fjpg string, reversed bool) error {
 					ch.SetShortAt(y, x, int16(value))
 				}
 			}
-		case StretchToCumulativeCutMinMax:
-			channels[i] = cumulativeCountCutEnhancement(ch,
-				config.GCONFIG.BrowserImg.CumulativeCutLower,
-				config.GCONFIG.BrowserImg.CumulativeCutUpper)
-			ch.Close()
 		}
+
 	}
 
 	img8bit := gocv.NewMat()