Hello, Selon Pierre Willenbrock <pierre at pirsoft.dnsalias.org>:
> Hi, > > Guillaume Gastebois schrieb: > > Hello, > > > > So, what's the next step ? Re-enabling shading ? > > Yes, but only after the shading-calibration is able to get black level > information.(This really needs a better api..) How to do that ? Do you mean a better api adapted to lide 90 or for all genesys backend ? Do you have some code ? > > > Do you think that last modification "for (i = 150; i..." is necessary ? > > Yes. Some time back, that part of the code just used the middle half of > the scan, exactly to drop the dummy black pixels at the begin. That > didn't work too well, missing some low black levels. > > > Is it time to fine tune registers 52... ? > > Try increasing register 53, 55, 57 by one. Attached is a small program, > that shows the probability of any two-byte pair appearing in a file. It > takes the file as input and dumps an portable anymap(pnm) as output. > I created that program for something completely unrelated, but it proved > useful. > > I used it on offset1_1.pnm(as offset1_0.pnm is only black). > The image should show a fuzzy vertical and horizontal bar, near > top/left. Currently, the horizontal bar is more a line, the vertical bar > is correct(it shows the relationship between the low byte of one pixel > and the high byte of the _next_ pixel). > OK, interesting program. I'll try it tonight. One more thing, what are you thinking about output image quality ? Is that normal with todays calibration or is it another problem ? Regards Guillaume > > Regards > > Guillaume > > Regards, > Pierre > > > Pierre Willenbrock a ?crit : > >> Guillaume Gastebois schrieb: > >>> Hello, > >>> > >>> Yep, I write "for (j = 150; j...." instead of "for (i = 150; i....." > >>> Now second set seems good. Result is on : > >>> http://ggastebois.free.fr/lide90_snoop/20_test1.tar > >>> > >> Hi, > >> > >> i am sorry, i actually wanted 450, but didn't realize until just now. I > >> missed that the calibration dump images are really grayscale images, > >> although stored in color pnms. 1 pixel in image is 3 pixels for the > >> calibration... > >> > >> I hope this fixes that part of the calibration. > >> > >> Regards, > >> Pierre > >> > >>> Regards > >>> Guillaume > >>> > >
