My work involves creative new ways to play with light by co-designing optical and digital processing.
My work lies at the INTERSECTION of processing of photons and processing of bits.
At MERL, I transformed the field of computational photography, with key papers and impact on products At Media Lab, I invented a new field ‘computational light transport’
If I turn this laser point ON and OFF in a trillionth of a second .. i.e. in a few femto-second ..
I will create a packate of photons .. less than a milimeter long .. Bullet of light .. Traveling a million times faster than ord bullet
What if we send this bullet of photons to shatter into this bottle How does light look in slow motion The whole sequence is less than a nanosecond stretched to about 10 seconds i.e. 10 billion times slowed down If an oridinary bullet, same distance at such a slow motion video, do you know how long you will have to sit here to watch the movie? A day, a week .. a whole year .. it will be a very boring movie ..
so we have to use a stroboscopic sampling method to fire the bullet millions of times and do clever sync and record raw data, and use computational techniques to to weave together femto-video.
World’s fastest videos Same photo about 10 million times to get enough photons World’s fastest slowest camera ..
Superman can fly and heroes can becomes invisible .. But what about a new power for a future super-hero .. To see around corners ..
My idea is to use the multiple bounces of light i.e. echoes of light.
Echoes of sound -> Echoes of light
We all know about echoes of sound. But sounds travels slow and we can actually hear the echoes Light travels fast so we need specialized hardware to ‘listen’ to these echoes. So we end up using light sources and cameras that run at a trillion frames per second (not a million and not a billion, but trillion)
And to see deep inside the body with endoscopes that look in narrow channels in lungs Or colons
Provide oral health solutions via a tooth brush that takes achieves x-ray like screening
Ancient text witout damaging books
How can we drive on foggy, crowded streets As if it is a sunny day on a clear road
My Photo24 roll film for one year
MIT Media Lab
Replacement Expansion Prediction
Predictive Modeling of Future Health
Theia: API for Diabetic Retinopathy Screening
Open API and Documentation
Drag and Drop Web Demo
Swedish et al
Visual Urban Sensing
Naik, Glaeser, Hidalgo, Raskar (email: email@example.com)
for Street-level Images
Quantifying Urban Change
Applications: Real estate, Data-driven urban policy and planning
How to use computer vision
and crowdsourcing to
evaluate the appearance of
cities across the world
at street-level resolution and
Smartphone spectroscopy for consumer applications
Arduino pro mini Bluetooth module
Application in rapid testing of food quality: Chlorophyll fluorescence in fruits
Anshuman Das, Akshat Wahi, Ishan Kothari and Ramesh Raskar
Hand-held 3D Imager for biomedical applications
3D imaging of throat and tonsils for
evaluation of obstructive sleep apnea
Anshuman Das, Tulio Valdez, Ramesh Raskar et. Al.,
Biomed. Opt. Express 7, 1445-1457 (2016)
3D imaging of the tympanic membrane
for accurately detecting ear infections
Anshuman Das, Julio Estrada, Ramesh Raskar et. Al.,
Proc. SPIE, 9303, 93031F (2015)