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Blog - Post List

Any Measurement to Pi - Blog #8: Direct OCR from Raspberry Pi Camera Image/Video (Part 2)

taifur

In my previous blog I shown in step by step how we can take and preprocess an image for successful OCR using Raspberry Pi. I explained every step with example code, input and the output of the step. At the end of the last blog I added the source code...
- 24 Jun 2023
Pollinator Pollster, Part 6: Assembly and First Tests

soldering.on

Pollinator Pollster (Powered by Pi) One week to go until the contest deadline, but things are coming together now - exciting and slightly nerve-wracking in equal measure! In this blog post I'll be showcasing the sensor assembly, and demonstrating som...
- 24 Jun 2023
Measuring air quality with Raspberry Pi #6 - Summary

deimosmuc

Project Summary In my contest project, I documented the process of measuring air quality using Raspberry Pi and the SPS30 particle matter sensor. I shared my journey through a series of blog posts. The first post, "Introduction," gives an o...
- 23 Jun 2023
PiBCI - Post #5 - Finished GUI and (almost) electrodes

MarioDL99

The Finished Graphic User Interface After working for so long, I finally finished the GUI. The GUI has three main functions: Plotting: it plots in real time from 8 channels Motor Imagery Tasks: with this function, everybody can do a simple motor ima...
- 23 Jun 2023
Blog #2 - Pi-Sense: A Raspberry Pi-based Environmental Monitoring System for Scientific Experiments

GabrielCuaFagiani

In this blog, I will show you step by step how to connect each of the sensors that make up Pi-Sense. To do this, you will need the following: Materials - Raspberry Pi 4 Model B - Protoboard - LCD I2C display - Temperature and humidity sensor - Motion...
- 23 Jun 2023
Measuring air quality with Raspberry Pi #5 - further measurements (with new update: 30th June)

deimosmuc

Multi-day garden measurement I ran the sensor in continuous operation in the garden last weekend including the following Monday. Unfortunately, I did not set the graph in Thingspeak to show more than 2 days. Interestingly, we have a wavy pattern th...
- 22 Jun 2023
Any Measurement to Pi - Blog #7: Direct OCR from Raspberry Pi Camera Image/Video

taifur

In my last two blogs I tried to understand which OCR technique I should use for my project. For getting the answer I have done some research using tesseract OCR and ssocr with some sample images. The lesson I learnt from those experiments is tressera...
- 20 Jun 2023
Any Measurement to Pi - Blog #6: Finding Best ORC Technique for Raspberry Pi (Part 2)

taifur

In my previous blog I illustrated the OCR result for any display that contains seven segment display like multimeter, digital weight scale, blood pressure meter. I foud that tesseract OCR engine is not good enough for reading seven segment display. M...
- 19 Jun 2023
Pollinator Pollster, Part 5: Audio Classification

soldering.on

Pollinator Pollster (Powered by Pi) In this post we'll discuss the audio classification element of this project in much more detail. You'll recall from my last post that I had been forced to make a direction change following withdrawal of sup...
- 18 Jun 2023
Any Measurement to Pi - Blog #5: Finding Best ORC Technique

taifur

In my last blog I prepared my Raspberry Pi 4 for doing OCR using Python. In this blog post I will try to find which OCR technique fits best for my case. I will do some experiment with some images of multimeter, blood pressure meter and digital weight...
- 17 Jun 2023