Hi,
Sorry for late reply.
It is possible to do this with Ghostscript but not with the ink_cov device as you say. However, it is possible to do this by measuring the coverage on tiff files exported by Ghostscript by using Python. Attached are two scripts. One batch file and one python script.
The batch file:
"C:\Program Files\gs\gs9.50\bin\gswin64c.exe" -dNOPAUSE -dNOCACHE -dBATCH -dNOSAFER -sDEVICE=tiffsep1 -r300x300 -sOutputFile="C:\tmp\%~nx1_p%%03d.tif" %1
"C:\Program Files\Python37\python.exe" "C:\Xerox\FreeFlow\Core\00000000-0000-0000-0000-000000000000\Data\Scripts\inkcov.py" %~nx1
The batch file does two things:
It first calls Ghostscript and saves the PDF as .tif files to C:\tmp using the tiffsep1 device. One tif for each separation, also for spot colors.
It then runs the python script that looks like this:
import cv2
import numpy as np
import os
import sys
report = open('C:/tmp/' + sys.argv[1] + '.txt',"w+")
files = os.listdir('C:/tmp/')
for pic in files:
if sys.argv[1] in pic and '.tif' in pic:
#print (pic)
report.write(pic)
report.write("\n")
img = cv2.imread(os.path.join('C:/tmp/', pic), 0)
assert not isinstance(img,type(None)), 'image not found'
inkcovIMG = img/np.full(img.shape, 255)
#print (round(100*(1-np.mean(inkcovIMG)), 1))
report.write(str(round(100*(1-np.mean(inkcovIMG)), 1))) # Coverage in percent with one decimal
report.write("\n")
The python script uses something called numpy and opencv to be able to calculate the ink coverage for each tif file in C:\tmp corresponding to the specific job and then writes the result to a txt file with the job name. To get the report as csv or similar some more scripting has to be done.
To install python as required for this you could use this as a reference: https://www.youtube.com/watch?v=d3AT9EGp4iw
You can then run this is an External Process in FFCore pointing to the batch file and use the default parameters. However, only $FFin$ is necessary in this case.
Stefan
