Measurement tasks that require specialised equipment and trained personnel can involve significant costs and time, especially when carried out in the field. Computer Vision models integrated into a mobile app make it possible to use a smartphone camera to capture the necessary images and automatically estimate focal length, without additional hardware. Measurement thus becomes a guided, digital process, with data immediately available for subsequent processing stages.
Taking measurements outside an equipped environment may require specific instruments, trained personnel and procedures that affect the scalability of the process.
Advanced smartphone cameras and the development of Computer Vision models offer a different approach to this type of task. The captured image is no longer merely visual documentation: it becomes the input from which the model can derive the measurement.
The aim is to make the process more accessible and easier to use in the field, while retaining a guided procedure for collecting the necessary information.
Methodological Approach
Step 1 — Guided Image Capture via Smartphone
The mobile app guides users through capturing an image with the smartphone camera.
During this stage, the system provides feedback on image quality, helping users capture an image suitable for subsequent processing.
Image capture thus becomes an integral part of the measurement process.
Step 2 — Estimation Using Computer Vision
The image is analysed using Computer Vision models developed to estimate focal length.
The measurement can therefore be obtained directly from the image captured with the smartphone, without specialised hardware.
Step 3 — Digitising and Using the Data
The measurement result is generated directly in digital form and can be made available for storage or use in subsequent processes.
Processing can also be implemented on customer-owned servers, depending on the organisation’s infrastructure and data management requirements.
Results
Measurements Available in the Field
Using a smartphone makes it possible to take measurements without relying on a dedicated workstation or specialised equipment.
Less Need for Specialised Hardware
The smartphone camera becomes the image-capture tool required by the process, reducing reliance on additional devices.
A Guided Process for Users
Feedback on image quality supports users during capture and makes it easier to obtain the data needed for processing.
Data Available Immediately in Digital Form
The measurement is produced directly in digital form and can be stored or used in downstream processes without further transcription steps.
