[Rawpixel RVB2601 development board trial experience] Display QR code

韵湖葱白

[Rawpixel RVB2601 development board trial experience] Display QR code [Copy link]

 

## Preface The most critical step in displaying a QR code is how to convert the QR code into an array of 0, 1. My steps are: (1) Generate a black and white QR code using a QR code tool. (2) Use an image tool to reduce the QR code to a size of 64*64 and make it a bmp monochrome mode. (3) Convert it into an array of 0, 1 through code. (4) Load it onto the board for display. # Convert image to 01 number python code This is a random code written without regard to standardization. ``` # coding: utf-8 from PIL import Image import numpy l = [] im = Image.open('趣python.bmp') matrix = numpy.asarray(im) for ms in matrix: tmp = [] for m in ms: if m[0] > 127: tmp.append(0) else: tmp.append(1) l.append([0]*32 + tmp + [0]*32) print(l) ``` The result is similar to this: ``` [[1, 1, 1, 1, 1, ...], ..., [..., 1, 1, 1, 1, 1]] ``` Replace `[` and `]` with `{` and `}`, and assign this array to g_bm_rv for display. # Result display  I have to say that the black background and white text look more advanced.

wangerxian

But black text on a white background is easier to scan~

led2015

Can it really be scanned out? The programming is so short, but the effect is good.

韵湖葱白

led2015 posted on 2022-5-25 21:26 Can it really be scanned out? The programming is so short, but the effect is good

Yes, this took about half an hour to figure out.

Try scanning the second QR code with WeChat!

Actually, it can be processed better. The processed picture is a bit blurry.

The focus is still on the early image processing. I will improve it later. You can see that some edges are not processed well.

freebsder

I thought it was a dynamically generated picture, but it turned out to be a bmp. You can try to generate it dynamically.