examples: add asciicam video to ascii in your terminal

Signed-off-by: deadprogram <ron@hybridgroup.com>

cmd/README.md

@@ -2,6 +2,12 @@
 
 GoCV comes with various useful command line utilities, that are also examples of how to use the package.
 
+## ASCIIcam
+
+Capture video from a connected webcam, and display it in the current terminal window in ASCII format.
+
+https://github.com/hybridgroup/gocv/blob/release/cmd/asciicam/main.go
+
 ## Basic Drawing
 
 Demonstrates the basic drawing primitives available for drawing on images.

cmd/asciicam/main.go

@@ -0,0 +1,76 @@
+// What it does:
+//
+// This example uses the VideoCapture class to capture video
+// then displays the ASCII representation of the video frames.
+//
+// How to run:
+//
+// 		go run ./cmd/asciicam/main.go
+//
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/subeshb1/wasm-go-image-to-ascii/convert"
+	"gocv.io/x/gocv"
+)
+
+const (
+	// FixedWidth is the fixed width of the ASCII image
+	FixedWidth = 80
+
+	// FixedHeight is the fixed height of the ASCII image
+	FixedHeight = 40
+)
+
+var buf gocv.Mat
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("How to run:\n\tcaptest [camera ID]")
+		return
+	}
+
+	// parse args
+	deviceID := os.Args[1]
+
+	webcam, err := gocv.OpenVideoCapture(deviceID)
+	if err != nil {
+		fmt.Printf("Error opening video capture device: %v\n", deviceID)
+		return
+	}
+	defer webcam.Close()
+
+	// streaming, capture from webcam
+	buf = gocv.NewMat()
+	defer buf.Close()
+
+	asciiConverter := convert.NewImageConverter()
+	opts := &convert.Options{FixedWidth: FixedWidth, FixedHeight: FixedHeight, Colored: true}
+
+	fmt.Printf("Start reading device: %v\n", deviceID)
+	for {
+		if ok := webcam.Read(&buf); !ok {
+			fmt.Printf("Device error: %v\n", deviceID)
+			continue
+		}
+		if buf.Empty() {
+			continue
+		}
+
+		img, err := buf.ToImage()
+		if err != nil {
+			fmt.Printf("Error converting mat to image: %v\n", err)
+			continue
+		}
+
+		// clear screen
+		fmt.Print("\033[H\033[2J")
+
+		// print the ASCII representation of the frame
+		fmt.Println(asciiConverter.Image2ASCIIString(img, opts))
+	}
+}

go.mod

@@ -5,4 +5,10 @@ go 1.21
 require (
 	github.com/hybridgroup/mjpeg v0.0.0-20140228234708-4680f319790e
 	github.com/pascaldekloe/goe v0.1.0
+	github.com/subeshb1/wasm-go-image-to-ascii v0.0.0-20200725121413-d828986df340
+)
+
+require (
+	github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
 )

go.sum

@@ -1,4 +1,25 @@
+github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59 h1:WWB576BN5zNSZc/M9d/10pqEx5VHNhaQ/yOVAkmj5Yo=
+github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59/go.mod h1:q/89r3U2H7sSsE2t6Kca0lfwTK8JdoNGS/yzM/4iH5I=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/hybridgroup/mjpeg v0.0.0-20140228234708-4680f319790e h1:xCcwD5FOXul+j1dn8xD16nbrhJkkum/Cn+jTd/u1LhY=
 github.com/hybridgroup/mjpeg v0.0.0-20140228234708-4680f319790e/go.mod h1:eagM805MRKrioHYuU7iKLUyFPVKqVV6um5DAvCkUtXs=
+github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
 github.com/pascaldekloe/goe v0.1.0 h1:cBOtyMzM9HTpWjXfbbunk26uA6nG3a8n06Wieeh0MwY=
 github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shurcooL/go v0.0.0-20200502201357-93f07166e636/go.mod h1:TDJrrUr11Vxrven61rcy3hJMUqaf/CLWYhHNPmT14Lk=
+github.com/shurcooL/go-goon v0.0.0-20170922171312-37c2f522c041/go.mod h1:N5mDOmsrJOB+vfqUK+7DmDyjhSLIIBnXo9lvZJj3MWQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.3.0 h1:NGXK3lHquSN08v5vWalVI/L8XU9hdzE/G6xsrze47As=
+github.com/stretchr/objx v0.3.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/subeshb1/wasm-go-image-to-ascii v0.0.0-20200725121413-d828986df340 h1:EN1NUPDAdhpWv9zNNdbovzqfJaRmnrwWaq0huRzQp9I=
+github.com/subeshb1/wasm-go-image-to-ascii v0.0.0-20200725121413-d828986df340/go.mod h1:A2X7CsJFb8jEdYaWeCbs2HydXC69J4Iaw4DM+bly5iw=
+github.com/wayneashleyberry/terminal-dimensions v1.0.0/go.mod h1:PW2XrtV6KmKOPhuf7wbtcmw1/IFnC39mryRET2XbxeE=
+golang.org/x/sys v0.0.0-20181019160139-8e24a49d80f8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=