Don't assume a camera

examples/camera.js

@@ -1,16 +1,20 @@
 var cv = require('../lib/opencv');
 
-var camera = new cv.VideoCapture(0);
+try {
-var window = new cv.NamedWindow('Video', 0)
+  var camera = new cv.VideoCapture(0);
-/*
+  var window = new cv.NamedWindow('Video', 0)
-setInterval(function() {
+  /*
-  camera.read(function(err, im) {
+  setInterval(function() {
-    if (err) throw err;
+    camera.read(function(err, im) {
-    console.log(im.size())
+      if (err) throw err;
-    if (im.size()[0] > 0 && im.size()[1] > 0){
+      console.log(im.size())
-      window.show(im);
+      if (im.size()[0] > 0 && im.size()[1] > 0){
-    }
+        window.show(im);
-    window.blockingWaitKey(0, 50);
+      }
-  });
+      window.blockingWaitKey(0, 50);
-}, 20);
+    });
-*/
+  }, 20);
+  */
+} catch (e){
+  console.log("Couldn't start camera:", e)
+}

examples/take-face-pics.js

@@ -1,29 +1,32 @@
 var cv = require('../lib/opencv');
-var vid = new cv.VideoCapture(0);
+try {
+  var vid = new cv.VideoCapture(0);
 
-vid.read(function(err, im){
+  vid.read(function(err, im){
-  if (err) throw err;
+    if (err) throw err;
+    if (im.size()[0] > 0 && im.size()[1] > 0){
 
-  if (im.size()[0] > 0 && im.size()[1] > 0){
+      im.detectObject(cv.FACE_CASCADE, {}, function(err, faces){
+        if (err) throw err;
+        if (!faces.length) return console.log("No Faces");
 
-    im.detectObject(cv.FACE_CASCADE, {}, function(err, faces){
+        var face = faces[0];
-      if (err) throw err;
+        var ims = im.size();
-      if (!faces.length) return console.log("No Faces");
+        var im2 = im.roi(face.x, face.y, face.width, face.height)
-
+        /*
-      var face = faces[0];
+        im.adjustROI(
-      var ims = im.size();
+             -face.y
-      var im2 = im.roi(face.x, face.y, face.width, face.height)
+           , (face.y + face.height) - ims[0]
-      /*
+           , -face.x
-      im.adjustROI(
+           , (face.x + face.width) - ims[1])
-           -face.y
+           */
-         , (face.y + face.height) - ims[0]
+        im2.save('./examples/tmp/take-face-pics.jpg')
-         , -face.x
+        console.log('Image saved to ./tmp/take-face-pics.jpg');
-         , (face.x + face.width) - ims[1])
+      })
-         */
+    } else {
-      im2.save('./examples/tmp/take-face-pics.jpg')
+      console.log("Camera didn't return image")
-      console.log('Image saved to ./tmp/take-face-pics.jpg');
+    }
-    })
+  });
-  } else {
+} catch (e){
-    console.log("Camera didn't return image")
+  console.log("Couldn't start camera", e)
-  }
+}
-});