I'm trying to find a way to scale down a QR Code into it's original pixel size without losing data.
QR Code Version 1 Contains 21x21 Pixels
but a lot of the generated QR Codes are scaled up to 200x200 or 300x300 pixels.
I'm trying to scale down the 200x200 or 300x300 into 21x21 without data loss.
I tried searching about how to scale down a qrcode but I didn't find any useful information.
I'm trying to print a UPC-A barcode from a Zebra printer using ZPL.
It always comes out with elongated guard bars like this:
I need it to print like a Code 128 style where all the lines are the same length but encoded UPC-A style:
Here is a basic ZPL:
^XA
^BY3^BUN,70,N,N,N,A
^FD42222200439^FS
^XZ
Any ideas? Thanks.
The only way I have seen to get rid of the descents on the guard bars is to draw over them with a white rectangle. This is straightforward to do with UPC-A since it is a fixed width barcode (95 modules wide) and the descenders are 5 modules in height. Since you are using ^BY3, we need to multiply those numbers by 3, giving a width of 285px and a height of 15px for the descenders.
The example below uses ^FT to position the barcode by its lower left corner. Note that guard bars extend below that position. Then we draw a white rectangle on top of the guard bar descents at the same origin, this time using ^FO:
^XA
^FT50,200^BY3^BUN,70,N,N,N^FD42222200439^FS
^FO50,200^GB285,15,15,W^FS
^XZ
Here is how it looks using the labelary emulator.
I am trying to list down pixels in an image where color is green. With the same code and image I am getting list of green color pixels on my mac. But the code when running on raspberry pi not able to identify green pixels.
if pix[num,i]==(0,255,0):
print(num, i)
I'm trying to read an image and to change pixels positions like (x-a), and (y-yb) in python. Does anyone have any idea how to do that?
I can not find the correct DXGI_FORMAT_* to represent a gray 8 bits image. Can anybody suggest a proper way drawing gray image using direct2d.
DXGI_FORMAT_A8_UNorm or DXGI_FORMAT_R8_UNORM