RANDOM POSTs
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What is the Light Field?
Read more: What is the Light Field?http://lightfield-forum.com/what-is-the-lightfield/
The light field consists of the total of all light rays in 3D space, flowing through every point and in every direction.
How to Record a Light Field
- a single, robotically controlled camera
- a rotating arc of cameras
- an array of cameras or camera modules
- a single camera or camera lens fitted with a microlens array
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More gravitational waves detected
Read more: More gravitational waves detectedGravitational waves are a prediction of the Theory of General Relativity It took decades to develop the technology to directly detect them They are ripples in the fabric of space and time produced by violent events Accelerating masses will produce waves that propagate at the speed of light Detectable sources ought to include merging black holes and neutron stars LIGO fires lasers into long, L-shaped tunnels; the waves disturb the light
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What did DeepSeek figure out about reasoning with DeepSeek-R1?
Read more: What did DeepSeek figure out about reasoning with DeepSeek-R1?https://www.seangoedecke.com/deepseek-r1
The Chinese AI lab DeepSeek recently released their new reasoning model R1, which is supposedly (a) better than the current best reasoning models (OpenAI’s o1- series), and (b) was trained on a GPU cluster a fraction the size of any of the big western AI labs.
DeepSeek uses a reinforcement learning approach, not a fine-tuning approach. There’s no need to generate a huge body of chain-of-thought data ahead of time, and there’s no need to run an expensive answer-checking model. Instead, the model generates its own chains-of-thought as it goes.
The secret behind their success? A bold move to train their models using FP8 (8-bit floating-point precision) instead of the standard FP32 (32-bit floating-point precision).
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By using a clever system that applies high precision only when absolutely necessary, they achieved incredible efficiency without losing accuracy.
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The impressive part? These multi-token predictions are about 85–90% accurate, meaning DeepSeek R1 can deliver high-quality answers at double the speed of its competitors.Chinese AI firm DeepSeek has 50,000 NVIDIA H100 AI GPUs
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Raspberry Pi – introduction and basic projects
Read more: Raspberry Pi – introduction and basic projects
Connect through SSH on windows
https://www.putty.org/Connect through Desktop
Remote DesktopCommon commands
> sudo raspi-config
> sudo apt-get update
> sudo apt-get upgrade
> ifconfig
> nano test.py
> wget https://path.to.image.png
> sudo apt-get install git
> git clone https://REPOSITORY
> sudo reboot
> suto shutdown -r now (reboot after shutdown)
> cat /etc/os-release
Starting kits:
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Photography basics: f-stop vs t-stop
Read more: Photography basics: f-stop vs t-stopF-stops are the theoretical amount of light transmitted by the lens; t-stops, the actual amount. The difference is about 1/3 stop, often more with zooms.
f-stop is the measurement of the opening (aperture) of the lens in relation to its focal length (the distance between the lens and the sensor). The math is focal length / lens diameter.
It mainly controls depth of field, given a known amount of light.
https://www.scantips.com/lights/fstop2.html
The smaller f-stop (larger aperture) the more depth of field and light.
Note that the numbers in an aperture—f/2.8, f/8—signify a certain amount of light, but that doesn’t necessarily mean that’s directly how much light is getting to your sensor.
T stop on the other hand is the measurement of how much light passes through aforementioned opening and actually makes it to the sensor. There is no such a lens which does not steal some light on the way to the sensor.
In short, is the corrected f-stop number you want to collect, based on the amount of light reaching the sensor after bouncing through all the lenses, to know exactly what is making it to film. The smaller, the more light.http://www.dxomark.com/Lenses/Ratings/Optical-Metric-Scores
Note that exposure stop is a measurement of sensibility to light not of lens capabilities.
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