How to perform Real time Simple Image Processing in RaspberryPi with the following Conditions

Domain: Optical camera Communication, Image Processing

Problem Description:
I need to capture as many images as possible continuously (viz. capturing 70 images per second) with higher frame rate and lossless compression but it should not be stored on any disk, as soon as it captures, immediately a specific portion of an image has to be analyzed whether it is bright or dark (say its capturing the Led light) and it should give output as 1 or 0 respectively.

Conditions:
1. I should be able to do programming only in C / C++, I shouldn’t use any part of Java or Python programming (since timing matters a lot)

2. I don’t want to use OpenCV, Matlab or any other higher image processing softwares or tools (since requirement of my task is very simple)