Grayscale: avoid darkening pages with little content (#158)

Adjust black point: 0.01 -> 0.004
2026-04-21 15:38:45 +02:00
parent 8b80ca12b2
commit 1169bed9a5
1 changed files with 1 additions and 1 deletions
--- a/imageprocessing/src/main/java/org/fairscan/imageprocessing/PostProcessing.kt
+++ b/imageprocessing/src/main/java/org/fairscan/imageprocessing/PostProcessing.kt
@@ -253,7 +253,7 @@ fun enhanceGrayscaleImage(img: Mat): Mat {
    val sorted = Mat()
    Core.sort(flat, sorted, Core.SORT_ASCENDING)
    val n = sorted.cols()
-    val pLow  = sorted.get(0, (n * 0.01).toInt())[0]
+    val pLow  = sorted.get(0, (n * 0.004).toInt())[0]
    val pHigh = sorted.get(0, (n * 0.99).toInt())[0]
    flat.release(); sorted.release()