I want to learn what are the problems of their (both far and near sighted/ low vision) vision and how to represent images in a different way to them for their clear visibility.
Please provide me links to study.
You may look at the work of Eli Peli who examined various ways for image enhancement for the visually impaired, both through image processing (i.e., no costly devices) and also by optical devices/ head mounted displays.
http://serinet.meei.harvard.edu/faculty/peli/
Its seem a bit tough to help visually impaired people without using any camera. Still your idea of modifying images looks cool. I am following this chain and hope for an interesting discussion here.
Nice question Kuldip, I will surely share my views and ideas- if I got striked by some..
This is a cool research and I think if done it will surely cut-down the costs for the high-end cameras used by such groups of people. I think a better place to start with is to understand how the existing high-end cameras process and present the (images) visual signals to those people. Since we need to use images in our case, try to find a way of transforming the visual camera signals which actual images which you can see and interpret yourself, so you will be in a position to understand different attributes and characteristics (like resolution, brightness distribution, and so on). But here is my thinking with regard to cutting-down the costs. One of the main component which contribute to the cost of a camera is a sensor. Usually, a sensor that has higher resolution (number of pixels per area) makes the camera expensive. Since the intention of such high-end camera is to produce high resolution images, we may use a super resolution technology to enhance the resolution of the images after being captured. Therefore, just a low-end camera with sensor of low resolution can capture an image and that image will undergo super resolution (image processing technique to increase the resolution of the image) to improve the details and quality of the image. This way, just simple cameras can be used. The attribute I have used here is just resolution, with an assumption that it is the one used as the quantity of interest in such cameras. However, I think understanding other attributes may help.
Have a look on the work of Brian A. Barsky http://www.cs.berkeley.edu/~barsky/ , e.g. "Correcting for Optical Aberrations using Multilayer Displays"
You may look at the work of Eli Peli who examined various ways for image enhancement for the visually impaired, both through image processing (i.e., no costly devices) and also by optical devices/ head mounted displays.
http://serinet.meei.harvard.edu/faculty/peli/
I don´t offer you teoretical links, only a practical approach.
Use OpenCV to track and detect objects based in video/photo streams (android support)
http://www.intorobotics.com/how-to-detect-and-track-object-with-opencv
Of course you need train the system that you build to recognize forms and objects but its a quickly start, and of course you need modify the object contrast by areas or increase the size of the focus.
Maybe you must consider conbine this system with some eye tracking technique to get the focus.
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