working on crop

tools/OcrDaemon/Models.cs

@@ -242,7 +242,7 @@ class TemplateMatchResponse
     public double Confidence { get; set; }
 }
 
-class DiffOcrParams
+sealed class DiffCropParams
 {
     [JsonPropertyName("diffThresh")]
     public int DiffThresh { get; set; } = 20;
@@ -259,6 +259,16 @@ class DiffOcrParams
     [JsonPropertyName("trimCutoff")]
     public double TrimCutoff { get; set; } = 0.4;
 
+    [JsonPropertyName("ocrPad")]
+    public int OcrPad { get; set; } = 10;
+
+    public override string ToString() =>
+        $"diffThresh={DiffThresh} maxGap={MaxGap} trimCutoff={TrimCutoff:F2} rowThreshDiv={RowThreshDiv} colThreshDiv={ColThreshDiv} ocrPad={OcrPad}";
+}
+
+sealed class OcrParams
+{
+    // preprocessing
     [JsonPropertyName("kernelSize")]
     public int KernelSize { get; set; } = 41;
 
@@ -277,9 +287,7 @@ class DiffOcrParams
     [JsonPropertyName("softThreshold")]
     public bool SoftThreshold { get; set; } = false;
 
-    [JsonPropertyName("ocrPad")]
-    public int OcrPad { get; set; } = 10;
-
+    // Tesseract-specific
     [JsonPropertyName("usePerLineOcr")]
     public bool UsePerLineOcr { get; set; } = false;
 
@@ -292,12 +300,40 @@ class DiffOcrParams
     [JsonPropertyName("psm")]
     public int Psm { get; set; } = 6;
 
-    public DiffOcrParams Clone() => (DiffOcrParams)MemberwiseClone();
+    // post-merge / Python engine tuning
+    [JsonPropertyName("mergeGap")]
+    public int MergeGap { get; set; } = 0;
+
+    [JsonPropertyName("linkThreshold")]
+    public double? LinkThreshold { get; set; }
+
+    [JsonPropertyName("textThreshold")]
+    public double? TextThreshold { get; set; }
+
+    [JsonPropertyName("lowText")]
+    public double? LowText { get; set; }
+
+    [JsonPropertyName("widthThs")]
+    public double? WidthThs { get; set; }
+
+    [JsonPropertyName("paragraph")]
+    public bool? Paragraph { get; set; }
 
     public override string ToString() =>
         UseBackgroundSub
-            ? $"bgSub dimPct={DimPercentile} textThresh={TextThresh} soft={SoftThreshold} ocrPad={OcrPad} perLine={UsePerLineOcr} lineGap={LineGapTolerance} linePadY={LinePadY} psm={Psm} diffThresh={DiffThresh} rowThreshDiv={RowThreshDiv} colThreshDiv={ColThreshDiv} maxGap={MaxGap} trimCutoff={TrimCutoff:F2} upscale={Upscale}"
-            : $"topHat kernelSize={KernelSize} ocrPad={OcrPad} perLine={UsePerLineOcr} lineGap={LineGapTolerance} linePadY={LinePadY} psm={Psm} diffThresh={DiffThresh} rowThreshDiv={RowThreshDiv} colThreshDiv={ColThreshDiv} maxGap={MaxGap} trimCutoff={TrimCutoff:F2} upscale={Upscale}";
+            ? $"bgSub dimPct={DimPercentile} textThresh={TextThresh} soft={SoftThreshold} upscale={Upscale} mergeGap={MergeGap}"
+            : $"topHat kernel={KernelSize} upscale={Upscale} mergeGap={MergeGap}";
+}
+
+sealed class DiffOcrParams
+{
+    [JsonPropertyName("crop")]
+    public DiffCropParams Crop { get; set; } = new();
+
+    [JsonPropertyName("ocr")]
+    public OcrParams Ocr { get; set; } = new();
+
+    public override string ToString() => $"[{Crop}] [{Ocr}]";
 }
 
 class TestCase