Quagga unable to read code generated from pdf to image

[redochka]

I am extracting a barcode from a pdf using FPDF than converting it to an image using pdf.js

The barcode is readable by other bar code scanner tools. however quaggajs is not able to detect it.

I am using the basic nodejs example which works with other barcodes.

What could be wrong with a barcode found in a pdf and converted to an image?