Merge pull request #138 from abdullahranginwala/adapt-thresholding

Added functionality for adaptive thresholding
scorelab · Jul 19, 2023 · dd2d095 · dd2d095
2 parents 35ae078 + 3d6091c
commit dd2d095
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diff --git a/imagelab_electron/operations.js b/imagelab_electron/operations.js
@@ -23,6 +23,7 @@ const PROCESS_OPERATIONS = {
   EROSION: "filtering_erosion",
   DILATION: "filtering_dilation",
   MORPHOLOGICAL: "filtering_morphological",
+  ADAPTIVETHRESHOLDING: "thresholding_adaptivethreshold"
   SIMPLETHRESHOLDING: "thresholding_applythreshold",
 };
 

diff --git a/imagelab_electron/src/controller/main.js b/imagelab_electron/src/controller/main.js
@@ -23,6 +23,7 @@ const AffineImage = require("../operator/geometric/AffineImage");
 const ReflectImage = require("../operator/geometric/ReflectImage");
 const RotateImage = require("../operator/geometric/RotateImage");
 const ScaleImage = require("../operator/geometric/ScaleImage");
+const AdaptiveThreshold = require("../operator/thresholding/AdaptiveThresholding");
 const ApplyThreshold = require("../operator/thresholding/ApplyThreshold");
 
 class MainController {
@@ -233,6 +234,9 @@ class MainController {
           new Morphological(PROCESS_OPERATIONS.MORPHOLOGICAL, id)
         );
         break;
+      case PROCESS_OPERATIONS.ADAPTIVETHRESHOLDING:
+        this.#appliedOperators.push(
+          new AdaptiveThreshold(PROCESS_OPERATIONS.ADAPTIVETHRESHOLDING, id)
       case PROCESS_OPERATIONS.SIMPLETHRESHOLDING:
         this.#appliedOperators.push(
           new ApplyThreshold(PROCESS_OPERATIONS.SIMPLETHRESHOLDING, id)

diff --git a/imagelab_electron/src/operator/thresholding/AdaptiveThresholding.js b/imagelab_electron/src/operator/thresholding/AdaptiveThresholding.js
@@ -0,0 +1,37 @@
+const OpenCvOperator = require("../OpenCvOperator");
+
+   /**
+    * This class contains the main logic to apply adaptive threshold
+    * to an image
+    */
+
+   class AdaptiveThreshold extends OpenCvOperator {
+     #maxvalue = 0;
+     constructor(type, id) {
+           super(type, id);
+     }
+
+     setParams(type, value) { 
+      if (type === "maxValue") {
+         this.#maxvalue = value;
+      } 
+     }
+
+
+     /**
+      *
+      * @param {Mat} image
+      * @returns
+      *
+      * This function processes adaptive threshold
+      * to the mat image
+      */
+     compute(image) {
+       const dst = new this.cv2.Mat();
+       this.cv2.cvtColor(image, image, this.cv2.COLOR_RGBA2GRAY, 0);
+       this.cv2.adaptiveThreshold(image, dst, this.#maxvalue, this.cv2.ADAPTIVE_THRESH_GAUSSIAN_C, this.cv2.THRESH_BINARY, 3, 2);
+       return dst;
+     }
+   }
+
+   module.exports = AdaptiveThreshold;