cloudcv / cloudcv-bootstrap

A starter template for Node.js with OpenCV bindings. This project lets you to quickly prototype a REST API in a Node.js for a image processing service written in C++.

CloudCV Boostrap

A starter template for Node.js with OpenCV bindings.

This project lets you to quickly prototype a REST API in a Node.js for a image processing service written in C++.

Installation

# Get the latest snapshot 
$ git clone —depth=1 --branch 0.0.1 https://github.com/CloudCV/cloudcv-bootstrap.git myproject
$ cd myproject 
$ git remote rm origin 

# Install NPM dependencies 
$ npm install

# Start local server
$ npm start

After starting local webserver, navigate to http://localhost:3000 where you should see similar page:

Here you can drop arbitrary image to extract dominant colors using REST-API.

Quick start

npm start

Unit testing

npm test

Questions?

Explore the series of blog posts:

1. https://computer-vision-talks.com/introducing-cloudcv-bootstrap/
2. https://computer-vision-talks.com/marshalling-data-in-nodejs-c-modules/
3. https://computer-vision-talks.com/how-to-debug-nodejs-addons-in-visual-studio/

CloudCV bootstrap is free software/open source, and is distributed under the BSD license. It contains third-party code, see the included third-party.txt file for the license information on third-party code.

CloudCV bootstrap is created and maintained by Eugene Khvedchenya (Twitter: @cvtalks). Follow the official Twitter stream @cvtalks to get the frequent development updates.

cloudcv-bootstrap's Issues

Problems with CORS

Hi,
I am experiencing problems with Cross-Origin Request Blocked. I am getting the following error from the console.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://45.55.223.62:3000/api/v1/image/analyze/dominantColors/?image=http%3A%2F%2F45.55.223.62%3A8888%2Fimages%2Fmandrill.png. This can be fixed by moving the resource to the same domain or enabling CORS.

My header response is:
Connection: keep-alive
Content-Type: application/json
Date: Thu, 14 May 2015 06:04:28 GMT
Transfer-Encoding: chunked
X-Powered-By: Express

Any idea what that could be?
Cheers,
Michel

Build Error: No Matching Function for Call to v8::Signature ::New(v8::Isolate*, NanIntern::Factory<v8::Signature>::FTH&, int&, NanIntern::Factory<v8::Signature>::FTH*&)

Hi All,

I am very much new to nodejs and npm and want to make a webapp for an image processing algorithm. For the same, I want to use this template of cloudcv-bootstrap and hence, I carried the install procedure as was mentioned. My verisons are as follows:

node -- 4.2.3
npm -- 2.14.7
nodejs -- 0.10.25

When I ran npm install, it starts building after installing all the dependencies. However, I got the following errors:

make: Entering directory `/home/kinoder/ws/cloudcv-bootstrap/build'
CXX(target) Release/obj.target/cloudcv/src/cloudcv.o
In file included from ../node_modules/nan/nan_new.h:190:0,
from ../node_modules/nan/nan.h:80,
from ../src/cloudcv.cpp:14:
../node_modules/nan/nan_implementation_12_inl.h: In static member function ‘static NanIntern::FactoryBasev8::Signature::return_t NanIntern::Factoryv8::Signature::New(NanIntern::Factoryv8::Signature::FTH, int, NanIntern::Factoryv8::Signature::FTH_)’:
../node_modules/nan/nan_implementation_12_inl.h:181:76: error: no matching function for call to ‘v8::Signature::New(v8::Isolate_, NanIntern::Factoryv8::Signature::FTH&, int&, NanIntern::Factoryv8::Signature::FTH_&)’
return v8::Signature::New(v8::Isolate::GetCurrent(), receiver, argc, argv);
^
../node_modules/nan/nan_implementation_12_inl.h:181:76: note: candidate is:
In file included from /home/kinoder/.node-gyp/4.2.3/include/node/node.h:42:0,
from ../node_modules/nan/nan.h:24,
from ../src/cloudcv.cpp:14:
/home/kinoder/.node-gyp/4.2.3/include/node/v8.h:4675:27: note: static v8::Localv8::Signature v8::Signature::New(v8::Isolate_, v8::Localv8::FunctionTemplate)
static Local New(
^
/home/kinoder/.node-gyp/4.2.3/include/node/v8.h:4675:27: note: candidate expects 2 arguments, 4 provided
In file included from ../src/cloudcv.cpp:14:0:
../node_modules/nan/nan.h: At global scope:
../node_modules/nan/nan.h:171:25: error: redefinition of ‘template v8::Local NanEnsureLocal(v8::Local)’
NAN_INLINE v8::Local NanEnsureLocal(v8::Local val) {
^
../node_modules/nan/nan.h:166:25: error: ‘template v8::Local NanEnsureLocal(v8::Handle)’ previously declared here
NAN_INLINE v8::Local NanEnsureLocal(v8::Handle val) {
^
../node_modules/nan/nan.h:564:13: error: ‘node::smalloc’ has not been declared
, node::smalloc::FreeCallback callback
^
../node_modules/nan/nan.h:564:35: error: expected ‘,’ or ‘...’ before ‘callback’
, node::smalloc::FreeCallback callback
^
../node_modules/nan/nan.h: In function ‘v8::Localv8::Object NanNewBufferHandle(char, size_t, int)’:
../node_modules/nan/nan.h:568:50: error: ‘callback’ was not declared in this scope
v8::Isolate::GetCurrent(), data, length, callback, hint);
^
../node_modules/nan/nan.h:568:60: error: ‘hint’ was not declared in this scope
v8::Isolate::GetCurrent(), data, length, callback, hint);
^
../node_modules/nan/nan.h: In function ‘v8::Localv8::Object NanNewBufferHandle(const char, uint32_t)’:
../node_modules/nan/nan.h:575:67: error: call of overloaded ‘New(v8::Isolate, const char&, uint32_t&)’ is ambiguous
return node::Buffer::New(v8::Isolate::GetCurrent(), data, size);
^
../node_modules/nan/nan.h:575:67: note: candidates are:
In file included from ../node_modules/nan/nan.h:25:0,
from ../src/cloudcv.cpp:14:
/home/kinoder/.node-gyp/4.2.3/include/node/node_buffer.h:31:40: note: v8::MaybeLocalv8::Object node::Buffer::New(v8::Isolate_, v8::Localv8::String, node::encoding)
NODE_EXTERN v8::MaybeLocalv8::Object New(v8::Isolate_ isolate,
^
/home/kinoder/.node-gyp/4.2.3/include/node/node_buffer.h:31:40: note: no known conversion for argument 3 from ‘uint32_t {aka unsigned int}’ to ‘node::encoding’
/home/kinoder/.node-gyp/4.2.3/include/node/node_buffer.h:43:40: note: v8::MaybeLocalv8::Object node::Buffer::New(v8::Isolate_, char_, size_t)
NODE_EXTERN v8::MaybeLocalv8::Object New(v8::Isolate* isolate,
^
/home/kinoder/.node-gyp/4.2.3/include/node/node_buffer.h:43:40: note: no known conversion for argument 2 from ‘const char_’ to ‘char_’
In file included from ../src/cloudcv.cpp:14:0:
../node_modules/nan/nan.h: In function ‘v8::Localv8::Object NanNewBufferHandle(uint32_t)’:
../node_modules/nan/nan.h:579:61: error: could not convert ‘node::Buffer::New(v8::Isolate::GetCurrent(), ((size_t)size))’ from ‘v8::MaybeLocalv8::Object’ to ‘v8::Localv8::Object’
return node::Buffer::New(v8::Isolate::GetCurrent(), size);
^
../node_modules/nan/nan.h: In function ‘v8::Localv8::Object NanBufferUse(char*, uint32_t)’:
../node_modules/nan/nan.h:586:12: error: ‘Use’ is not a member of ‘node::Buffer’
return node::Buffer::Use(v8::Isolate::GetCurrent(), data, size);
^
Is there anything that I can do to resolve this issue ?

Suggestion for increased usage of this concept using API client/server generators

I was thinking after finding this project that it is a great idea, and wondered if you thought it might be a good idea to write a Swagger spec for the API, so that you could from automatically generate a variety of different types of servers and clients for a large number of available programming languages. I am not 100% sure what would be involved in the process of generating bindings for OpenCV for each language, but I do know many different bindings exist that could be adapted for this purpose.

This would make the project interesting for a wider audience. If you feel this is worth investigating further I will start doing some research and see what all would be necessary. I am fairly new to Swagger and OpenCV, but I learn quick.

Version checking required for OpenCV version / Error checking if it can't handle operation

After doing npm install, it shows the animal and doesn't actually extract the colors.
After dragging/dropping an arbitrary image into the browser it doesn't do anything at all.

POST http://10.0.0.3:3000/api/v1/image/analyze/dominantColors/ 404 (Not Found)

Error in Ubuntu 14.04 when npm install cloudcv-bootstrap

multiple of warnings

one error

Independent NanCheck

Would it be possible to create a new project just for NanCheck?

I think it would be really interesting for people building node.js addons.

Error compiling

Error compiling:

  cloudcv.cpp
  ImageView.cpp
  Job.cpp
  Algorithm.cpp
C:\dev\cloudcv-bootstrap\src\framework/marshal/opencv.hpp(51): error C2766: explicit specialization; 'Nan::marshal::Serializer<std::string>' has a
lready been defined (compiling source file ..\src\framework\ImageView.cpp) [C:\dev\cloudcv-bootstrap\build\cloudcv.vcxproj]
  C:\dev\cloudcv-bootstrap\node_modules\nan-marshal\nan-marshal.h(252): note: see previous definition of 'Serializer<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >' (compiling source file ..\src\framework\ImageView.cpp)

Interactive Background removal

Hey currently i am working on a background removal feature i have already implemented in opencv using grabcut but for the web thing i wonder how could i use your cloud cv to integrate opencv libraries ?? Reply Asap!!nks
Thanks!

Incorrect display in we browser.

Hi,
Thank you for cloudcv-bootstrap.
I am unable to generate the sample output (dominant colors palette display) on a web broswer
Wondering if the latest release broke some code?

Also, using curl localhost:3000/api/v1/image/analyze/dominantColors?image=opencv-logo.jpg is returning json formatted dominant color output as explained.

-Satish.