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[technik3k]

Reserved for V5 Vision sensor wiki entry

@jpearman

have a look at these knowledge base articles.

https://help.vex.com/category/205-vision-sensor

There are two different ways to configure the sensor depending on whether you want to use the robot config panel or just create vision header files.

@jmckenna

STEM Lab that discusses how to use the Vision Sensor with VEXcode V5 Blocks. You can find it here: https://education.vex.com/parent-wrapper.php?id=vision-sensor-v5

There is also an example project in both VEXcode V5 Blocks & text that features the Vision Sensor.

https://api.vexcode.cloud/v5/html/classvex_1_1vision.html

Vision Sensor

@R47

The imaging sensor itself has a resolution of 640x400, but the vision sensor processes the data, and the data returned has a resolution of 316x212.

V5: Aim a VEX V5 Vision Sensor at a Target

This is a demonstration of how to write code using the V5 Vision Sensor to find a vision target object, and then orient your robot to “face” directly towards the target. You will need to configure the vision sensor before trying the program. We include a link to how to configure the Vision Sensor here. Sample Projects Blockly Python C++ [image]

Vision sensor setup

There still seems to be some issues setting up the vision sensor. Although we do know that VCS 1.0/vision sensor utility has a few bugs in this area, it is still pretty simple, I’m not sure why the theories about needing to freeze the image are running around. Anyway, here’s a quick demo showing how easy it is. [V5 vision sensor demo] The configuration that is hidden inside robot-config.h looks like this and is what is used in your program to setup the vision sensor when it runs. …

Vision Sensor targeting

I had a play around today with the vision sensor on one of my old demo robots. The goal was just to test some simple targeting code that could be used as a basis for a more complex program. The robot setup looks like this. [P1050576] I obviously have a large target, but the concept would be the same no matter what size although the code would need to filter out more noise (meaning removing small intermittent objects) with something less well defined. I have the vision sensor mounted sidewa…

Vision sensor FOV measurements

I’ve been asked a few times about the vision sensor field of view. I wrote in this thread that is was 67 deg, that was based on quick measurements with a target pretty close to the sensor, that number is close but not correct. @Windows10010 posted earlier today here that they thought it was 30 deg, that seemed way too narrow from what I remembered. I used to do this type of measurement often as I worked in the film industry for a camera manufacturer. It’s pretty easy to do, harder with this …

VEX Library

Some debugging tricks:

@jpearman

If you look at the V5 dashboard when you are running your code, do you see the detected objects ?

When your code is not running, you can test the vision sensor with our preset values for red, green, blue and yellow, but these settings are not related to anything in your program, they are just for testing if it is working.

Meaning of Vision Sensor parameters?
Vision Sensor config - objectCount inconsistent - #7 by jpearman
V5 Vision Sensor "The Camera detected must be unlocked" - #19 by jpearman
Vision Sensor Wifi - #9 by jpearman
Vision Sensor Having Issues Seeing Objects - #7 by jpearman
V5 Vision Sensor Color Code Coordinate Tracking

Vision Sensor Math:

Vision Sensor

EDIT: DODGY AND/OR INCORRECT MATH CASE WITH GROUND OBJECT I am not that confident in my math, but here is what I came up with. SETUP Your sensor is mounted on a tower. Your sensor is always a certain distance from the ground, if your robot stays level. [image] The sensor can see objects, and it gives them X and Y coordinates. (x is between 0 and 640, y is between 0 and 400.) I am not sure if the coordinates will work exactly as shown, but it will be close …

Object Tracking:

V5 Vision Sensor Object Tracking

We’ve been experimenting with the V5 vision sensor to better understand how it works and what its limitations are. Theo, our programmer, has so far been able to make it track and follow a ball using just a P loop for now. We used an old NBN ball because our game objects hadn’t arrived yet. [VEX Turning Point: V5 Vision Sensor Object Tracking]