Experimental CLI tool for visually exploring video image filters and algorithms that are part of OpenCV. Written in Go using GoCV.
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.




CVscope is an experimental CLI tool for visually exploring video image filters and algorithms that are part of OpenCV (http://opencv.org).

CVscope runs on Linux, macOS, and Windows 10.

CVscope itself is written in the Go programming language using GoCV (https://gocv.io).

How to install

In order to use CVscope you must first have installed OpenCV and GoCV. Please follow the instructions located at https://gocv.io/getting-started/ for your operating system.

You can then install CVscope by running:

go get -u gocv.io/x/cvscope

How to run

Running the main program without any parameters:


will display a list of the various valid CVscope commands:

CVscope is a command line tool for OpenCV that lets you visually explore various 
filters and algorithms for computer vision.

It can also generate Go code that them implements the needed commands using the GoCV
programming library. CVscope is itself written using GoCV.

cvscope [command]

Available Commands:
bilateral   Apply bilateral filter to video images
blur        Blur video images
dilate      Dilate video images

Here is a CVscope command that opens a window using the default camera, and then displays the video using the Blur filter:

cvscope blur


While the CVscope program is running you can change the values for ksize X and ksize Y by adjusting the sliders, and the video will display the current image filter settings in real-time.

You can also generate the Go code that matches the current image filter settings. By pressing the g key, the code is output to the command line window where you started CVscope running. For example, when running the blur command, pressing g outputs the following:

Go code for current filter:
gocv.Blur(src, &dest, image.Pt(12, 12))

You can obtain a list of all the supported keyboard commands and other details for a particular filter by using the cvscope help command. For example this displays help for the blur command:

cvscope help blur

How to build

CVscope does not yet support cross platform builds, so you must build the program on the desired target operating system.


go build -o cvscope main.go


go build -o cvscope.exe main.go


CVscope is licensed under the Apache 2.0 license. Copyright 2018 The Hybrid Group.