triadagod.blogg.se - Add border to text opencv

#Add border to text opencv how to
#Add border to text opencv movie
#Add border to text opencv install
#Add border to text opencv full

If OpenCV is already installed on your computer, lucky you! You can check to see if you have it installed or double check your version in a python shell like this: For this project I am using OpenCV 2.4.12.

#Add border to text opencv install

That means we have to install it manually. Unfortunately, OpenCV is not available via pip. If you’re on Windows, try following this tutorial. We’ll kick things off by getting started with OpenCV on Mac. Phone numbers can be verified via your Twilio Account’s Phone Numbers Page. If you are using a Twilio trial account for this example, you will only be able to send messages to phone numbers that you have verified with Twilio.

12 (Don’t worry, we’ll walk through the setup below)

Pip, the friendly Python Package Installer.

Python 2.x (Python 3.x is compatible with OpenCV however the setup instructions are different).

Twilio Python helper library to create our TwiML.

A publicly accessible URL to configure Twilio webhook ( try ngrok).

These are only available in the United States and Canada.

A Twilio phone number with MMS capability.

Sign up for your free account if you don’t have one already. To kick things off, let’s take a look at our dependencies. So why not send one to this Twilio number and see what happens? Go on, give it a try. Instead of giving you a hipster mustache, I opted to remix Rob Spectre’s Mustachify for The Martian, Martianify! Because what’s a better way to kill time than to take selfies? You know you were going to do it anyway. When Twilio decided to host a private screening of The Martian as a way for the community to come together, it seemed like the perfect opportunity to make something fun for people to play with as they filed into the theater.

#Add border to text opencv movie

With the help of an open source image processing library called OpenCV, along with Twilio MMS, Python, and Flask we are limited only by our imagination.Īnd if you haven’t seen The Martian yet, seriously, what are you waiting for? The movie is really good, filled with science, Matt Damon and potatoes.

#Add border to text opencv how to

What is the right (or a good) way to robustly filter for text like this? Is there a "standard" technique that can latch onto this kind of outline? I'm hoping to stick to image processing and basic heuristics, rather than more advanced discrimination like machine learning.If you’re curious to find out how to launch yourself into outer space and land on Mars, you’ve come to the right place.

#Add border to text opencv full

on the right here is a feature that looks quite "text-y" after thresholding.įiltering "small" contours is also challenging, as there are valid small strokes in Chinese, as well as punctuation like full stops and commas. I have tried to filter the image with a Laplace Pyramid filter (based on this example), but it's hard to find a filter that homes on the white text without often blowing noise in the background into pure white too. Some backgrounds are very noisy, so there can be a lot of spurious edges too (this is a bit contrived, as no filtering is done, and the Canny aperture is too big, but the double edges are visible): A naive first attempt that just thresholded the image is not sufficient, as it (predictably) produces artifacts in areas of white background (eg under the first and second characters in this example).Įdge detection is also challenging, as you get a decent "inner edge" for the white-black edge, but you might or might not get an outer edge for the black-background boundary (if the background is dark), or you might only get a partial or unclosed outline. What I'd like to achieve is something like this that can be fed to OCR:

What I'd like to achieve is a "tidy" black-on-white image of the text.Įxample input, something like this, where the background is uncontrolled, and can also be as white as the text. The text in question is mostly in Chinese script (some numbers and Latin letters) of a known font (looks like SimHei), is white (ish) and has a black (ish) border, and occurs left-aligned at a constant location. I have some video frames I'd like to extract some text from (for making softsubs from hardsubbed video for learning).