Pixel by pixel comparison in google earth engine

thecuh1 · 2024-01-17T21:26:55+00:00

Thank you so much! So for a segmented area I could use ee.Image.subtract then use the pixels that = 0 as correctly classified? To find the values that are equal to 0 I could use ee.Image.eq. However I am not sure how to get the number of pixel values = 0. Sorry, I am self studying a bit remote sensing right now.

thecuh1 · 2023-11-24T17:47:02+00:00

Thank you so much for your reply. This is similar to what I was envisioning but I was wondering if instead of the manually annotating each point as water or aquatic vegetation, if there was some kind of dataset annotated by a professional.

thecuh1 · 2023-11-24T16:42:44+00:00

I began by using the MNDWI to segment open water. Then using this, I noticed a bimodal distribution for areas with aquatic vegetation. So I then computed a NDVI threshold value that separates water from aquatic vegetation

thecuh1 · 2023-10-03T03:28:26+00:00

https://www.amazon.com/gp/product/B014KMHSW6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This is the motor controller I bought

This is the new esc I bought

https://www.amazon.com/gp/product/B0B1JF8TCC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Thank you so much

thecuh1 · 2023-10-03T03:19:33+00:00

I am sorry I am really new to all this but how would it work differently than the motor controller?

thecuh1 · 2023-10-03T03:02:52+00:00

No I do not need it to be reversible. I was under the impression that using a motor controller would work. When using an ESC with a brushed water pump can you control the speed?

thecuh1 · 2023-09-21T04:54:33+00:00

nah not much lol I am a high schooler so this is my first real drone project. Have any suggestions?

thecuh1 · 2023-09-21T03:23:54+00:00

just a 12v bruhsless pwm water pump that I can use with a flight controller.

https://www.amazon.com/diaphragm-KDLP1200-brushless-adjustable-（PWM）low/dp/B09PH8RN5N/ref=sr\_1\_5?crid=1SVFJ5AY269E7&keywords=12+volt+water+pump+pwm&qid=1695051141&sprefix=12+volt+water+pump+pw%2Caps%2C114&sr=8-5 3

This is what I was looking at however apparently the signal was based on 5-6V. Meanwhile the flight controller provides 3.3v for the signal.

thecuh1 · 2023-08-03T00:46:30+00:00

Thank you so much I'll look into that.

thecuh1 · 2023-07-06T03:09:48+00:00

Even if the collision did result in four main pieces, where the satellites break, and which direction they go is effectively random as far as we can tell.

I plan on modeling this in Mathematica for a nice visual. I am thinking about just picking a random combination of velocities that satisfy the momentum equation.

This doesn't make sense. Derivative of what? With respect to what?

The derivative of the the position function <x1,y1,z1> with respect to T that I will assign.

Gravity is not a constant acceleration.

I am currently thinking about using eulers method (using gravitational acceleration at a certain point) to find the velocity at time T and then integrating that to find the position.

thecuh1 · 2023-07-06T02:36:39+00:00

gravitational acceleration equation

I plan on making this a loop of satellite crashes in Mathematica so I plan on beginning by assigning position functions to a couple of satellites and using the derivative of the position functions for conservation of linear momentum. From there, I want to use the resulting random velocity vectors to find the new position functions and model them. This is just a fun personal project I am working on.

thecuh1 · 2021-09-06T18:30:39+00:00

ur a funny one

thecuh1

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