ನಿಮ್ಮ ಮೊಬೈಲ್‌ ನಿಂದಲೇ ನಿಮ್ಮ Height ಚೆಕ್‌ ಮಾಡಿ

Measuring height with a phone is an increasingly convenient option, thanks to advancements in smartphone technology. Whether for tracking a child’s growth, measuring objects for DIY projects, or even for health purposes, mobile apps now make it possible to gauge height accurately without a tape measure. Here’s a detailed breakdown of how height measurement works on a phone and the various methods available.

1. Using AR-Based Apps

Augmented Reality (AR) is one of the primary methods smartphones use to measure height. AR technology overlays digital information onto the real world through your phone’s camera, creating an interactive experience that can calculate distances and dimensions.

How AR-Based Apps Work

AR-based apps like Google Measure and Apple’s Measure app (available on iPhones with iOS 12 and later) use your phone’s camera, gyroscope, and accelerometer. Here’s a simple step-by-step process to measure height using AR:

1. Open the App: Open the height-measuring app on your phone.
2. Calibrate the Camera: Hold your phone steady as the app calibrates. This process involves scanning the floor or surroundings to set a reference point.
3. Align the Start Point: Point your camera at the base of the object or person whose height you want to measure.
4. Mark the Top Point: Raise your phone upwards or swipe on the screen to extend a line to the top of the object or person.
5. Read the Measurement: The app will calculate and display the height.

The app uses a combination of the phone’s sensors and complex algorithms to create an estimate of the height.

Pros of AR-Based Apps

• Quick and Easy: AR-based apps provide a quick, hassle-free solution for measuring height.
• No Physical Tools Required: You don’t need any additional equipment apart from your phone.
• Decent Accuracy: For personal use, the accuracy is generally satisfactory, though it may not be suitable for professional measurements.

Limitations of AR-Based Apps

• Requires Good Lighting: Poor lighting can impact accuracy.
• Not Suitable for Small Objects: Measuring small objects can sometimes result in inaccurate readings as AR works best on larger items or people.

2. Using Photogrammetry

Photogrammetry is a technique that involves taking multiple photos from different angles to create a 3D model. Some height-measuring apps use this method, especially for measuring objects or people. While photogrammetry requires more effort than AR-based methods, it can yield higher accuracy.

Steps for Photogrammetry-Based Apps

1. Take Multiple Photos: Capture multiple images of the person or object from different angles.
2. Upload the Photos: Upload the images to the app or service, which will process them.
3. Obtain Measurements: The app processes the images to create a 3D model and provides height measurements based on that model.

Pros of Photogrammetry

• Higher Accuracy: Photogrammetry tends to be more accurate than simple AR apps.
• Can Measure Complex Shapes: This method works well on irregularly shaped objects or people.

Limitations of Photogrammetry

• Requires Multiple Photos: The process can be time-consuming.
• Dependent on Camera Quality: Higher-quality cameras produce more accurate results, which may limit this method’s usability on low-end phones.

3. Using a Laser Range Finder App

Laser range finder apps calculate distances using the principle of time-of-flight, which means they assess the time taken for light to travel to an object and return. Only a few phones come with built-in laser sensors (like some models in the Samsung Galaxy and Google Pixel series), so not everyone may have this option. However, apps that leverage laser range-finding sensors where available can give reliable height measurements.

Steps for Using a Laser Range Finder

1. Open the App: Launch the range finder app compatible with your phone model.
2. Point the Laser: Align the phone to the base of the object and trigger the sensor.
3. Adjust the Aim: Slowly move the laser to the top of the object.
4. Get the Measurement: The app will provide an estimate based on the laser’s readings.

Pros of Laser Range Finders

• High Precision: This technology offers excellent precision and is particularly helpful for professional uses.
• Quick Measurement: The laser allows for fast measurement without manually marking points.

Limitations of Laser Range Finders

• Not Available on All Phones: Only a few models offer laser range finders.
• Limited to Indoor Use: Reflective surfaces or bright sunlight can affect readings.

4. Using LiDAR Technology

LiDAR (Light Detection and Ranging) is a technology often found on premium iPhone models (such as the iPhone 12 Pro and above) and some iPads. LiDAR sensors create depth maps by measuring how long it takes for light to return after hitting an object. The technology is highly accurate, which makes it a good option for measuring heights.

How to Measure Height with LiDAR

1. Open the App (Apple Measure): Open the Measure app on an iPhone or iPad with LiDAR.
2. Calibrate the Sensor: The app will automatically start scanning the environment.
3. Position the Camera: Point the device toward the person or object, and align the camera with the base.
4. Read the Height Measurement: The device uses LiDAR to calculate and display the height in real time.

Pros of LiDAR

• Extremely Accurate: LiDAR provides very precise measurements.
• Works in Various Lighting Conditions: LiDAR is less affected by lighting, making it more versatile.

Limitations of LiDAR

• Available Only on Premium Devices: LiDAR is found on high-end Apple devices, which may not be accessible for all users.
• Higher Battery Usage: Running LiDAR continuously may drain your battery faster.

5. Using Image Scaling and Reference Objects

For users without AR or LiDAR-equipped devices, a more straightforward approach involves using reference objects in photos. This method requires a known object (like a ruler or standard item) to act as a scale.

Steps for Measuring Height with Reference Objects

1. Place a Reference Object: Set an object of known height next to the person or item you wish to measure.
2. Take a Photo: Capture a photo that includes both the reference object and the person/item.
3. Upload to an App or Edit Manually: Use an app that supports scaling or manually adjust the scale by comparing the known height to the unknown height.

Pros of Image Scaling

• Works on Any Phone: Any phone with a camera can use this method.
• Cost-Effective: Requires no extra features or technology.

Limitations of Image Scaling

• Less Accurate: This method relies on estimation and may not be precise.
• Time-Consuming: Requires careful alignment and multiple steps.

Tips for Measuring Height with a Phone

• Ensure Good Lighting: Poor lighting can distort measurements, so ensure you’re in a well-lit area.
• Hold the Phone Steady: Movement can lead to inaccurate measurements.
• Use High-Quality Cameras: If possible, use a device with a high-resolution camera for more precise results.
• Follow App Instructions Carefully: Each app has unique instructions; following them closely can improve accuracy.

Summary

From AR and LiDAR technology to photogrammetry and image scaling, several methods are available to measure height using your smartphone. While AR-based and LiDAR-equipped devices offer quick and accurate results, even simple camera techniques with reference objects can provide useful estimates. These solutions make height measurement easy and accessible, ensuring you can measure heights conveniently, wherever you are.