Camera only shows black screen. How to fix?

Processing Coding Questions
1

It’s a weird thing and only occurs in this sketch i’m working on. So it can’t be a problem with my (laptop) webcam.

https://drive.google.com/drive/folders/1Vu4FjusiwR7pa1BzRV1mA_I5yCBbbgT2?usp=sharing

My sketch has 3 states.

State 1: -take a snapshot from the webcam when clicking the Left mouse button
-apply chroma keying to it (remove greens)
-Put the snapshot in an array

State 2: -Preview the snapshots in the array in a row that moves to the left

State 3 is irrelevant for now.

The problem is that in State 2 only black pictures are being previewed. I didn’t have this issue until i let somebody do some tweaks to my code which i can’t remember any details about.

I couldn’t find a solution for this, my teacher didn’t manage to figure it out either.
What I can tell is that the code consists of several intergrated code-examples from the web and from school, so there are a couple of things in the code I don’t even understand myself. Yeah I’m a big noob.

Anyway, Thanks by advance for any help.
And if you think my sketch is a mess, sorry for my sketch being a mess…

1 Like
2

How many lines of code do you have there? Can you paste it here?

Kf

3

A lot. That’s why I didn’t.

I can send each tab in a pastebin if you like.

State_ProgrammingV3_Kasper https://pastebin.com/QM5JnVkM

SetupCam: https://pastebin.com/ice4gGUf

Arduino: https://pastebin.com/3Luvx2AF

STATE 1: https://pastebin.com/AdQw6u3q

STATE 2: https://pastebin.com/VQN5dcGg

STATE 3: (irrelevant): https://pastebin.com/Ugi1Vk3h

4

Yes, you have an arduino there which means your sketch will not run without changing some things in your code. This is why an mcve is the way to go: a simple sketch that runs and demonstrates the problem. For the time being, can you indicate what section is suspicious, what lines you suspect the problem resides at?

Kf

5

Nevermind, got the problem solved by one of my teachers.
I simply forgot to add camera.read().

Anyway, thanks for your help.

1 Like
6

Glad it is solved. It was a simple solution and a very tiny bug.

Kf