[Color segmentation] Add sliders for hue, saturation and value (brigh…

…tness)

samples/css/base.css

@@ -19,7 +19,9 @@ body {
 }
 
 .stats-settings, .threads-control, .jitter-limit, .edge-error,
-.downscale-level, .threshold-block-size, .threshold-offset, .demo-state {
+.downscale-level, .threshold-block-size, .threshold-offset, .demo-state,
+.lower-hue-control, .upper-hue-control, .lower-saturation-control,
+.upper-saturation-control, .lower-value-control, .upper-value-control {
   padding: 10px;
   width: 100%;
   border-bottom: dotted silver 1px;

samples/css/settings.css

@@ -78,7 +78,8 @@
   display: block;
   position: relative;
 }
-#jitterLimit, #edgeError, #thresholdBlockSize, #thresholdOffset {
+#jitterLimit, #edgeError, #thresholdBlockSize, #thresholdOffset,
+#lowerHue, #upperHue, #lowerSaturation, #upperSaturation, #lowerValue, #upperValue {
   width: 130px;
 }
 #downscaleLevel {
@@ -89,7 +90,8 @@
 }
 .settings-bar input[type=range],
 #jitterLimit, #edgeError, #downscaleLevel,
-#thresholdBlockSize,#thresholdOffset {
+#thresholdBlockSize,#thresholdOffset,
+#lowerHue, #upperHue, #lowerSaturation, #upperSaturation, #lowerValue, #upperValue {
   display: block;
   -webkit-appearance: none;
   margin: 7px 2px;
@@ -99,15 +101,20 @@
 }
 .settings-bar input[type=range]:focus,
 #jitterLimit:focus, #edgeError:focus, #downscaleLevel:focus,
-#thresholdBlockSize:focus, #thresholdOffset:focus {
+#thresholdBlockSize:focus, #thresholdOffset:focus,
+#lowerHue:focus, #upperHue:focus, #lowerSaturation:focus,
+#upperSaturation:focus, #lowerValue:focus, #upperValue:focus {
   outline: none;
 }
 .settings-bar input[type=range]::-webkit-slider-runnable-track,
 #jitterLimit::-webkit-slider-runnable-track,
 #edgeError::-webkit-slider-runnable-track,
 #downscaleLevel::-webkit-slider-runnable-track,
 #thresholdBlockSize::-webkit-slider-runnable-track,
-#thresholdOffset::-webkit-slider-runnable-track {
+#thresholdOffset::-webkit-slider-runnable-track,
+#lowerHue::-webkit-slider-runnable-track, #upperHue::-webkit-slider-runnable-track,
+#lowerSaturation::-webkit-slider-runnable-track, #upperSaturation::-webkit-slider-runnable-track,
+#lowerValue::-webkit-slider-runnable-track, #upperValue::-webkit-slider-runnable-track {
   width: 100%;
   height: 4px;
   background: white;
@@ -121,7 +128,10 @@
 #edgeError::-webkit-slider-thumb,
 #downscaleLevel::-webkit-slider-thumb,
 #thresholdBlockSize::-webkit-slider-thumb,
-#thresholdOffset::-webkit-slider-thumb {
+#thresholdOffset::-webkit-slider-thumb,
+#lowerHue::-webkit-slider-thumb, #upperHue::-webkit-slider-thumb,
+#lowerSaturation::-webkit-slider-thumb, #upperSaturation::-webkit-slider-thumb,
+#lowerValue::-webkit-slider-thumb, #upperValue::-webkit-slider-thumb {
   width: 9px;
   height: 20px;
   -webkit-appearance: none;
@@ -137,7 +147,10 @@
 #edgeError:focus::-webkit-slider-runnable-track,
 #downscaleLevel:focus::-webkit-slider-runnable-track,
 #thresholdBlockSize:focus::-webkit-slider-runnable-track,
-#thresholdOffset:focus::-webkit-slider-runnable-track {
+#thresholdOffset:focus::-webkit-slider-runnable-track,
+#lowerHue:focus::-webkit-slider-runnable-track, #upperHue:focus::-webkit-slider-runnable-track,
+#lowerSaturation:focus::-webkit-slider-runnable-track, #upperSaturation:focus::-webkit-slider-runnable-track,
+#lowerValue:focus::-webkit-slider-runnable-track, #upperValue:focus::-webkit-slider-runnable-track {
   background: white;
 }
 @media screen and (max-width: 960px) {

samples/funnyHats/js/index.js

@@ -20,7 +20,7 @@ const imageHeight = 240;
 let nImagesLoaded = 0;
 // NOTE! Update this value if you add or remove files
 // from hatsData and glassesData in ui.js.
-const N_IMAGES = 34;
+const N_IMAGES = 33;
 
 
 function initOpencvObjects() {

samples/invisibilityCloak/index.html

@@ -51,6 +51,37 @@
       <label for="threadsNum" id="threadsNumLabel"></label>
       <input type="number" id="threadsNum" min="1" max="16">
     </div>
+
+    <div class="lower-hue-control centered">
+      <label for="lowerHue">Lower value of Hue channel:
+        <output id="lowerHueOutput">0</output></label>
+        <input type="range" id="lowerHue" value="0" min="0" max="179" step="1">
+    </div>
+    <div class="upper-hue-control centered">
+      <label for="upperHue">Upper value of Hue channel:
+        <output id="upperHueOutput">33</output></label>
+        <input type="range" id="upperHue" value="33" min="0" max="179" step="1">
+    </div>
+    <div class="lower-saturation-control centered">
+      <label for="lowerSaturation">Lower value of Saturation channel:
+        <output id="lowerSaturationOutput">100</output></label>
+        <input type="range" id="lowerSaturation" value="100" min="0" max="255" step="1">
+    </div>
+    <div class="upper-saturation-control centered">
+      <label for="upperSaturation">Upper value of Saturation channel:
+        <output id="upperSaturationOutput">255</output></label>
+        <input type="range" id="upperSaturation" value="255" min="0" max="255" step="1">
+    </div>
+    <div class="lower-value-control centered">
+      <label for="lowerValue">Lower value of Brigtness channel:
+        <output id="lowerValueOutput">70</output></label>
+        <input type="range" id="lowerValue" value="70" min="0" max="255" step="1">
+    </div>
+    <div class="upper-value-control centered">
+      <label for="upperValue">Upper value of Brigtness channel:
+        <output id="upperValueOutput">255</output></label>
+        <input type="range" id="upperValue" value="255" min="0" max="255" step="1">
+    </div>
   </div>
 
   <video id="videoInput" class="hidden"></video>

samples/invisibilityCloak/index.js

@@ -13,8 +13,6 @@ let canvasInputCtx = null;
 let src = null;
 let background = null;
 let dst = null;
-let lowerRedRange = null;
-let upperRedRange = null;
 
 // Camera parameters are not stable when the camera is just getting started.
 // So we execute a loop where we capture background and use the last frame
@@ -26,19 +24,32 @@ function initOpencvObjects() {
   src = new cv.Mat(video.height, video.width, cv.CV_8UC4);
   background = new cv.Mat(video.height, video.width, cv.CV_8UC4);
   dst = new cv.Mat();
+}
 
+function inRange(hsv, mask) {
   // In OpenCV, Hue range is [0,179], Saturation range is [0,255]
-  // and Value range is [0,255]. We use 0-33 range for blue color,
-  // 100-255 for saturation and 70-255 for brigtness.
-  lowerRedRange = new cv.Mat(video.height, video.width, cv.CV_8UC3,
-    new cv.Scalar(0, 100, 70, 255));
-  upperRedRange = new cv.Mat(video.height, video.width, cv.CV_8UC3,
-    new cv.Scalar(33, 255, 255, 255));
+  // and Value range is [0,255]. We use 0-33 range for BLUE color,
+  // 100-255 for saturation and 70-255 for brigtness as default settings.
+
+  let lh = parseInt(document.getElementById('lowerHue').value);
+  let uh = parseInt(document.getElementById('upperHue').value);
+  let ls = parseInt(document.getElementById('lowerSaturation').value);
+  let us = parseInt(document.getElementById('upperSaturation').value);
+  let lv = parseInt(document.getElementById('lowerValue').value);
+  let uv = parseInt(document.getElementById('upperValue').value);
+
+  let lowerRange = new cv.Mat(video.height, video.width, cv.CV_8UC3,
+    new cv.Scalar(lh, ls, lv, 255));
+  let upperRange = new cv.Mat(video.height, video.width, cv.CV_8UC3,
+    new cv.Scalar(uh, us, uv, 255));
+
+  cv.inRange(hsv, lowerRange, upperRange, mask);
+
+  lowerRange.delete(); upperRange.delete();
 }
 
 function deleteOpencvObjects() {
   src.delete(); background.delete(); dst.delete();
-  lowerRedRange.delete(); upperRedRange.delete();
 }
 
 function completeStyling() {
@@ -69,7 +80,7 @@ function captureBackground() {
 }
 
 function removeBlueColor(source, destination) {
-  let hsv = new cv.Mat();
+  let hsv = new cv.Mat(video.height, video.width, cv.CV_8UC3);
   let mask = new cv.Mat();
   let maskInv = new cv.Mat();
   let sourceResult = new cv.Mat();
@@ -79,8 +90,8 @@ function removeBlueColor(source, destination) {
   // HSV - Hue (color information), Saturation (intensity), Value (brightness).
   cv.cvtColor(source, hsv, cv.COLOR_BGR2HSV);
 
-  // Apply lower and upper boundary of a blue color to inRange filter.
-  cv.inRange(hsv, lowerRedRange, upperRedRange, mask);
+  // Apply lower and upper boundaries of HSV channels to inRange filter.
+  inRange(hsv, mask);
 
   // Dilation increases area of filtered object.
   let kernel = cv.Mat.ones(3, 3, cv.CV_32F);