Camera
The camera takes a picture.
The camera takes a picture.
Cloud AI
The AI makes a guess.
The AI makes a guess.
Human checking
You make the ground truth.
You make the ground truth.
My Smart Nail Science Lab
Let's teach the computer about fingernails!
Single Finger Training Data Mode
1. π· Take a Photo
2. π Find My Finger
3. π¨ Mark My Nail
4. π Explore
5. π Measure
6. π§ Teach AI
Step 1 of 5 β Take a finger picture
Loading interface...
Computers do not see pictures like people do.
Show ONE finger inside the box.
Keep your fingertip visible.
Point your fingertip to the LEFT: β Fingertip
Step 2 of 5 β Put one finger inside the guide
Keep the full fingertip visible. The large box is only a guide.
2. You Guess, Then Ask AI
The camera took a picture. We send a smaller copy of the guide area to an AI helper on the internet. Keep faces and personal information out of the picture.
Picture taken
What do YOU think?
Choose your guess before asking AI.
Picture taken! πΈ
Our School Rule
Maximum nail free edge: 3 mm
Your Guess
AI Visual Check
Interesting! Why do you think the answers are different?
Do you agree with AI?
Did AI find your finger correctly?
Did AI find your nail correctly?
Now let's teach AI!
π 4. Explore β How does a computer see your finger?
Tap and compare the picture tricks below. None of these is thermal imaging.
π Normal
This is what our camera captured.
β¬ Black & White
Sometimes colour is not needed to find shapes.
γ°οΈ Edges
These lines help the computer find borders.
π¨ Colour Map
Computers can rearrange colour information to look for patterns.
π¬ Pictures are made from tiny squares called pixels. The computer studies these tiny pieces.
Step 4 of 5 β Teach the AI
Colour the fingernail
The AI suggestion may already be painted. Paint, erase, undo, or clear it to make your final answer.
π 5. Measure and π§ 6. Teach AI
Your Answer
Your Nail Marking
Can we check the 3 mm rule yet?
Not yet! Things look bigger when they are closer to the camera. First we must teach the camera how big one millimetre is. That next experiment is called calibration.
π Next Experiment: Teach the camera about millimetres using something with a known size.
Save this as a training example?
Your nail marking is the correct answer. This is called ground truth.
Nail examples collected
0 / 50
Every careful example helps the experiment.
Collection Challenge
Different examples help the computer learn better.
Different finger
Different lighting
Different background
Short nail
Longer nail
Left hand
Right hand
Different person β no faces
Pictures are made from tiny squares
Each tiny square is called a pixel. The computer studies these pixels.
What are we teaching the computer?
A person can recognise a fingernail very quickly. A computer needs examples.
Pictures
β Correct nail markings
β AI training
β New picture
β AI guesses
New STEM Word: Training
Training means showing an AI many examples so it can learn patterns.
Normal Program and AI
Normal Program
We tell the computer rules, such as βlook for this colour.β
AI
We show the computer examples so it can learn patterns. AI does not think like a person.
Our Experiment
Question: Can a computer find a fingernail using colour and shape rules?
Observation: Sometimes it worked. Sometimes light, shadows and skin colour confused it.
Conclusion: We decided to teach the computer using examples. A result that did not work still taught us something useful.
How can a camera measure millimetres?
The same object can look bigger close to the camera and smaller farther away.
Calibration means using something with a known size to change pixels into real measurements. We are not measuring millimetres yet.
π My Discoveries
I took 0 nail pictures.
I taught the computer where the nail was. I learned that pictures contain pixels, computer vision can find shapes, AI needs examples, and pixels are not automatically millimetres.
STEM Word Book
Camera and Image
A camera collects light to make an image.
Pixel
A pixel is one tiny coloured square in a digital picture.
Computer Vision
Computer Vision helps a computer understand things inside pictures.
Image Processing
Changing a picture can make useful shapes or edges easier to see.
AI and Training Data
Training data is a collection of examples and correct answers used to teach an AI.
Measurement and Calibration
Calibration provides a known reference so pixels can later be compared with real units.
Language support
Educational text is stored in a language dictionary. Reviewed Tamil translations can be added without changing the activity.
Where is the AI?
Some computer programs run on this phone. Our AI helper runs on powerful computers on the internet. The phone sends the smaller finger picture and receives the AI's answer.
π± Phone
picture β
picture β
βοΈ AI
answer β
answer β
π± Phone
Privacy
This experiment sends the captured finger picture to our AI helper on the internet for analysis. Keep faces and personal information out of the picture. Only the camera-guide crop is sent. The final cropped example and nail marking can be saved for the experiment, and a parent can review or delete every sample.