From 3efe469ea022b8dd234092dd025cc2115f1ce9d8 Mon Sep 17 00:00:00 2001
From: prabirshrestha <mail@prabir.me>
Date: Mon, 3 Dec 2012 13:34:50 -0500
Subject: [PATCH 1/2] fixed require('buffers')

---
 lib/opencv.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/opencv.js b/lib/opencv.js
index ccb94c7..0e635f6 100755
--- a/lib/opencv.js
+++ b/lib/opencv.js
@@ -1,5 +1,5 @@
 var Stream = require('stream').Stream
-  , Buffers = require('buffer')
+  , Buffers = require('buffers')
   , util = require('util');
 
 var bindings = require('./bindings')

From 22bdf646b1d49642e984d13e62046793b75a3d2a Mon Sep 17 00:00:00 2001
From: Brandon Cheng <bcheng.gt@gmail.com>
Date: Sun, 27 Jan 2013 18:16:30 -0500
Subject: [PATCH 2/2] Add bindings for cv::inRange

---
 examples/color_filter.js | 12 ++++++++++++
 src/Matrix.cc            | 30 ++++++++++++++++++++++++++++++
 src/Matrix.h             |  2 ++
 3 files changed, 44 insertions(+)
 create mode 100644 examples/color_filter.js

diff --git a/examples/color_filter.js b/examples/color_filter.js
new file mode 100644
index 0000000..3cea2e5
--- /dev/null
+++ b/examples/color_filter.js
@@ -0,0 +1,12 @@
+var cv = require('../lib/opencv');
+
+// (B)lue, (G)reen, (R)ed
+var lower_threshold = [46, 57, 83];
+var upper_threshold = [80, 96, 115];
+
+cv.readImage('./coin1.jpg', function(err, im) {
+
+	im.inRange(lower_threshold, upper_threshold);
+	im.save('./coin_detected.jpg');
+
+});
diff --git a/src/Matrix.cc b/src/Matrix.cc
index 76f39cb..0eab50d 100755
--- a/src/Matrix.cc
+++ b/src/Matrix.cc
@@ -62,6 +62,8 @@ Matrix::Init(Handle<Object> target) {
   NODE_SET_PROTOTYPE_METHOD(constructor, "goodFeaturesToTrack", GoodFeaturesToTrack);
   NODE_SET_PROTOTYPE_METHOD(constructor, "houghLinesP", HoughLinesP);
 
+	NODE_SET_PROTOTYPE_METHOD(constructor, "inRange", inRange);
+
 	NODE_SET_METHOD(constructor, "Eye", Eye);
 
 
@@ -795,3 +797,31 @@ Matrix::Resize(const v8::Arguments& args){
 
   return scope.Close(Undefined());
 }
+
+
+Handle<Value>
+Matrix::inRange(const v8::Arguments& args) {
+	HandleScope scope;
+
+	Matrix *self = ObjectWrap::Unwrap<Matrix>(args.This());
+	/*if(self->mat.channels() != 3)
+		return v8::ThrowException(String::New("Image is no 3-channel"));*/
+
+	if(args[0]->IsArray() && args[1]->IsArray()) {
+		Local<Object> args_lowerb = args[0]->ToObject();
+		Local<Object> args_upperb = args[1]->ToObject();
+
+		cv::Scalar lowerb(0, 0, 0);
+		cv::Scalar upperb(0, 0, 0);
+
+		lowerb = setColor(args_lowerb);
+		upperb = setColor(args_upperb);
+
+		cv::Mat mask;
+		cv::inRange(self->mat, lowerb, upperb, mask);
+		mask.copyTo(self->mat);
+	}
+
+
+	return scope.Close(v8::Null());
+}
diff --git a/src/Matrix.h b/src/Matrix.h
index aa61fcc..44354f9 100755
--- a/src/Matrix.h
+++ b/src/Matrix.h
@@ -58,6 +58,8 @@ class Matrix: public node::ObjectWrap {
     JSFUNC(GoodFeaturesToTrack)
     JSFUNC(HoughLinesP)
 
+    JSFUNC(inRange)
+
 /*
 	static Handle<Value> Val(const Arguments& args);
 	static Handle<Value> RowRange(const Arguments& args);