OpenCV while being the most popular tool for a lot of machine vision applications it relies on a third party and some poorly maintained code. Capturing MJPEG compressed video from a UVC USB camera was always the case and it did not work or worked with some issues. This situation is especially bad for Windows OS. […]
Read MorePedestrian detection using YOLOv3
Owning a quality camera can be fairly useful by itself. Video stream can provide a lot of information not easily comprehendable by just using various sensors. However, not always there is a human eye to make a sense of it. Therefore, additional algorithms can be implemented to provide a lot of insights automatically. A lot […]
Read MoreRobotic vacuum cleaners compared like never before
It’s been a while since my experiments to analyze robotic vacuum cleaner motion. That time I used Kurokesu C1 camera mounted near the ceiling, recorded motion and ran some simple computer vision algorithms to get live heat map. Result is well described in previous blog record heatmap video of one robot. This time I present […]
Read More3D scanning like a pro
Almost any sensor yields more interesting results if mounted on a moving platform. Remember scanning thermometer? It’s time to mount TOF LIDAR (Time Of Flight / Light Imaging, Detection, And Ranging) on two precision rotary stages arranged for pan and tilt operation. Rig provides real-time position data along with distance to an obstacle. Using simple […]
Read MoreDIY thermal vision shoots 360 panoramas
Like most of you, I do like new technology and spend some money on new parts, sensors, toys, instruments and gadgets. While purchased small toy is on slow route I usually forget about it and remember only after it is delivered. Then item is settled in box proudly named “inbox” and continues it’s existence there […]
Read MoreDumb thermometer gets digital output
Some time ago I purchased 4 channel thermometer. Soon after tried few optical character recognition (OCR) techniques on 7 segment symbols including pytesseract, they worked but I was not happy with results. Few days ago pyimagesearch published article detailing his approach. So I pushed it a bit forward and made solution more robust. Also added […]
Read MoreHeatmap motion analysis of autonomous robot
I have always wanted to ease my daily life and obtain vacuum robot. Many things were stopping for a while, but finally found a local company which provides demo units so could not resist taking one for a spin. What a good chance to run some computer vision processing algorithms to analyze it! Seen few […]
Read MoreAny CS-mount camera deserves autofocus!
I have been working on open-sourced motorized zoom lens for a while. Probably there is no need to mention benefits of having motorized zoom/focus lens on a regular CS type camera. Even greater value comes by having auto-focus capability. This feature is being calculated on host computer and does not consume lot of resources. Many […]
Read MoreOpenCV USB camera widget in PyQT
Both tools OpenCV and PyQT are incredibly useful. One in combination with Qt Designer gives rapid GUI building possibility. Another is used for visual image/video analysis. There was one drawback – very little documentation how to use them into one piece of code. All in the past now! To be short – sample program I […]
Read MoreOpenCV 3 Python blur detection
In order to detect if picture is in focus modern consumer cameras use complicated phase detection circuitry and specialized sensors. But how to determine if captured picture is in focus after it has been taken. Having this measurement information can help in many ways (select best picture in a sequence, control motorized lens, clean time-lapse […]
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