https://github.com/nuriofernandez/keys-in-door-experiment

A simple experimental project to detect if the keys of my apartment are in the door thru the security camera. 🚪 📷
https://github.com/nuriofernandez/keys-in-door-experiment

Last synced: 2 days ago
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A simple experimental project to detect if the keys of my apartment are in the door thru the security camera. 🚪 📷

• Host: GitHub
• URL: https://github.com/nuriofernandez/keys-in-door-experiment
• Owner: nuriofernandez
• Created: 2024-03-25T10:33:51.000Z (8 months ago)
• Default Branch: master
• Last Pushed: 2024-04-18T00:56:55.000Z (7 months ago)
• Last Synced: 2024-04-18T01:48:07.395Z (7 months ago)
• Language: Go
• Homepage:
• Size: 15.6 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Are keys in the door?

I keep forgetting my keys on the outside of the door, and realize next morning I slept

with the keys in the door. 😱

So, I decided to create this service to be able to send me notifications.

## Requirements

- A security camera that supports `RTSP` (I use a TPlink/TAPO security camera)

- A device that can serve as a server

- FFmpeg installed

## My setup

I have my security camera looking to the door:

![](https://i.imgur.com/izcFbCu.jpeg)

## Technical explanation

From the keys area, I defined an area where the keys should be visible, and

for color comparaison, there is a control point to compare the colors with the

keys area.

![](https://i.imgur.com/4inD0In.png)

I get all pixels in that area and calculate the average color,

ignoring those too close to the control point.

```go

for y := startY; y >= endY; y-- {

    for x := startX; x <= endX; x++ {

        // Get the color of the pixel at the current position

        pixelColor := img.At(x, y)

        // Extract the RGB components

        r, g, b, _ := pixelColor.RGBA()

        if distance(r,g,b, controlPoint) < 10 {

            // Ignore colors too close to the control point

            // so later the comparator will be more precise.

            continue;	

        }

    }

}

```

Since the keys are darker than the door,

the difference between the control point should be noticeable.

```go

// Calculate the difference between the avg and the control point colors

difference := distance(

    avgR, avgB, avgG,

    controlPoint

)

// if the color from the control point differs more than 5 points,

// then the keys are there.

keysThere := difference > 5

return keysThere, nil

```

## What I do with the bool?

For now, I just established a simple http server that prints a json with it 🤣

```bash

GET http://localhost:8090/status

```

```json

{

  "keysInDoor": true

}

```