Graeme Gill wrote: > > When you say "misread", do you mean misread without noticing the problem, or > do you mean there is a reported misread ? > > I haven't seen any examples of non-reported misreads, with the exception of > the direction detection problem I mentioned before. I'd be interested in > hearing about any other reproducible examples of non-reported misread > problems. > > Graeme Gill. > I have read by chartread about 50 difficult charts from non-linearized inkjet printers and thermo-sublimation prints. I've got error messages from almost all of it. But only 3-4 times (6-7 strips) I've got no errors in bidirectional mode while direction determination error have took a place. The cases was confirmed by manual patch-by-patch readings. The patch number in row was 12-18 in that error cases. Some of charts was without spacers. It must be mentioned that preliminary profiles for targen in my error cases was rather far from real print (average dE~11, max dE>35). And errors haven't took a place while preliminary profile was quite good (max dE<10) and the chart have a spacers. Another minor issue for printtarg-targen is bad bath-to-patch contrast in dark-green and dark-brown tones without spacers. If I have a good preliminary profile with max dE<5 and do the chart without spacers, the chartread (or eyeOne instrument) cant distinguish a transient between adjacent dark patches. I had to scratch the paper between the patches to get the strip reading. The printtarg didn't know exactly what patches transient can be read robustly by EyeOne.