Timeline for Is barcode scanning with an ESP32 possible?
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 22, 2019 at 13:22 | comment | added | jcaron | I'm not sure how that would make the image better or simpler to process. When you scan with a camera, you have the issue that the edges are not "sharp" (as can be seen in your picture, there's a grey pixel between the white and the black areas), and I don't quite see how this would be different with the laser. The only use of a laser for barcode scanning is if you read back the signal as it is scanned and get the signal back directly, without sampling, to get the rising and falling edges. Another application is just to help the user point the camera correctly at the barcode. | |
| Nov 22, 2019 at 11:29 | comment | added | Marco Tulio Souza | I thought about the laser in order to reduce processing load. Onde might be able to tune camera parameter to get a better yet simpler image to process. | |
| Nov 19, 2019 at 8:38 | comment | added | jcaron | If you are using the camera, then the laser is probably overkill. The laser is useful if you have a sensor that receives the light as it is reflected during the scan: you get a signal with easy to detect edges. But if you use the camera, you just scan the image received (the more “scan lines” in various positions and directions the easier it is to find the barcode, but it adds to CPU usage). There are libraries that will do the scanning of the image (see my comments on the question), the only issue is to combine this with the image capture, but it should be pretty straightforward. | |
| Nov 16, 2019 at 18:02 | history | answered | Marco Tulio Souza | CC BY-SA 4.0 |