standardized 2D coordinates

Question

Hi,

I am trying to play with jevois camera, I enabled DemoQRcode module http://jevois.org/moddoc/DemoQRcode/modinfo.html. I connected jevois to the NodeMCU, and parsing QRCode coordinates streamed from the camera within the sketch.

I want to calculate the distance between detected QRCode.

I want to display a dot for each QRCode on the screen (1024x768).

How to transpose the jevois coordonates to the screen coordinates (1024x768) ?

Regards

Answer 1

The standardized 2D coordinates are as follows:

• center fo the camera's field of view is at x=0, y=0
• left edge of the camera image is always at x=-1000
• right edge of the camera image is always at x=1000
• top edge of the camera image is always at y=-750
• bottom edge of the camera image is always at y=750

With more details here http://jevois.org/doc/group__coordhelpers.html

If you have a look at our source code for stdToImg() you should be able to use that to remap to your 1024x768 screen:

http://jevois.org/doc/Coordinates_8C_source.html