opencv

README

OpenCV

This repository contains the Gobot drivers for opencv.

Getting Started

This package requires opencv to be installed on your system

OSX

To install opencv on OSX using Homebrew:

$ brew tap homebrew/science && brew install opencv

Ubuntu

Follow the official OpenCV installation guide

Windows

Follow the official OpenCV installation guide

Now you can install the package with

go get github.com/hybridgroup/gobot && go install github.com/hybridgroup/gobot/platforms/opencv

Using

package main

import (
	cv "github.com/hybridgroup/go-opencv/opencv"
	"github.com/hybridgroup/gobot"
	"github.com/hybridgroup/gobot/platforms/opencv"
)

func main() {
	gbot := gobot.NewGobot()

	window := opencv.NewWindowDriver("window")
	camera := opencv.NewCameraDriver("camera", 0)

	work := func() {
		gobot.On(camera.Event("frame"), func(data interface{}) {
			window.ShowImage(data.(*cv.IplImage))
		})
	}

	robot := gobot.NewRobot("cameraBot",
		[]gobot.Device{window, camera},
		work,
	)

	gbot.AddRobot(robot)

	gbot.Start()
}

Documentation

Overview

Packge opencv contains the Gobot drivers for opencv.

Installing:

This package requires `opencv` to be installed on your system

Then you can install the package with:

go get github.com/hybridgroup/gobot && go install github.com/hybridgroup/gobot/platforms/opencv

Example:

package main

import (
	cv "github.com/hybridgroup/go-opencv/opencv"
	"github.com/hybridgroup/gobot"
	"github.com/hybridgroup/gobot/platforms/opencv"
)

func main() {
	gbot := gobot.NewGobot()

	window := opencv.NewWindowDriver("window")
	camera := opencv.NewCameraDriver("camera", 0)

	work := func() {
		gobot.On(camera.Event("frame"), func(data interface{}) {
			window.ShowImage(data.(*cv.IplImage))
		})
	}

	robot := gobot.NewRobot("cameraBot",
		[]gobot.Device{window, camera},
		work,
	)

	gbot.AddRobot(robot)

	gbot.Start()
}

For further information refer to opencv README: https://github.com/hybridgroup/gobot/blob/master/platforms/opencv/README.md

Index

• func DetectFaces(haar string, image *cv.IplImage) []*cv.Rect
• func DrawRectangles(image *cv.IplImage, rect []*cv.Rect, r int, g int, b int, thickness int) *cv.IplImage
• type CameraDriver
  • func NewCameraDriver(name string, source interface{}) *CameraDriver
  • func (c *CameraDriver) Halt() bool
  • func (c *CameraDriver) Start() bool
• type WindowDriver
  • func NewWindowDriver(name string) *WindowDriver
  • func (w *WindowDriver) Halt() bool
  • func (w *WindowDriver) Init() bool
  • func (w *WindowDriver) ShowImage(image *cv.IplImage)
  • func (w *WindowDriver) Start() bool

Functions

func DetectFaces

func DetectFaces(haar string, image *cv.IplImage) []*cv.Rect

DetectFaces loads Haar cascade to detect face objects in image

func DrawRectangles

func DrawRectangles(image *cv.IplImage, rect []*cv.Rect, r int, g int, b int, thickness int) *cv.IplImage

DrawRectangles uses Rect array values to return image with rectangles drawn.

Types

type CameraDriver

type CameraDriver struct {
	gobot.Driver

	Source interface{}
	// contains filtered or unexported fields
}

func NewCameraDriver

func NewCameraDriver(name string, source interface{}) *CameraDriver

NewCameraDriver creates a new driver with specified name and source. It also creates a start function to either set camera as a File or Camera capture.

func (*CameraDriver) Halt

func (c *CameraDriver) Halt() bool

Halt stops camera driver

func (*CameraDriver) Start

func (c *CameraDriver) Start() bool

Start initializes camera by grabbing a frame every `interval` and publishing an frame event

type WindowDriver

type WindowDriver struct {
	gobot.Driver
	// contains filtered or unexported fields
}

func NewWindowDriver

func NewWindowDriver(name string) *WindowDriver

NewWindowDriver creates a new window driver with specified name. It adds an start function to initialize window

func (*WindowDriver) Halt

func (w *WindowDriver) Halt() bool

Halt returns true if camera is halted successfully

func (*WindowDriver) Init

func (w *WindowDriver) Init() bool

Init returns true if driver is initialized correctly

func (*WindowDriver) ShowImage

func (w *WindowDriver) ShowImage(image *cv.IplImage)

ShowImage displays image in window

func (*WindowDriver) Start

func (w *WindowDriver) Start() bool

Start starts window thread and driver