I am developing an iOS app similar to Word Lens . What I want is the functionality to add some blurred pieces as overlay on certain text part as shown in the attached images.
If it is possible to wipe out the text data completely from an Image, I would also appreciate that.
I searched a lot on internet and have found that it has something to do with OpenGL ES and OpenCV but do not exactly how to achieve this.

Any guidance would be highly appreciated !

Thanks
Please have a look at image here which has blurred rectangles over an Image under AVCaptureSession focus
![enter image description here](https://i.stack.imgur.com/nvtGR.jpg)