Does onyx thrive resample source images? I have a particular application where I need as much 1:1 as possible between a pixel based image saved at 601.183 ppi and the printed output and it appears onyx is resampling based on the banding I am seeing. Seems strange that it would resample so perhaps there is something goofy I am overlooking.
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Rips resampling images?
- Thread starter D3D
- Start date
victor bogdanov
Active Member
Can your printer print at "601.183 ppi"? I'm guessing whatever ppi the image is has to be converted to whatever dpi the printer is capable of based on the profile/printer limitations
ColorCrest
All around shop helper.
Interesting. So it lists the resolution as 601 not 601.183 so I would need to find the difference between those two numbers and use that to adjust the scale? So I would be looking for a value of 100.0304 it seems. Is that what you were imagining?
You think Onyx is using the manufacturer value of 601.183 but only displaying 601. Could be. And I had the same feeling about the imperial vs metric thing. Regardless when I do a test by printing a ronchi ruling in two different places on the bed I get the same banding which I am being told indicates the RIP is resampling my file. I'll do some tests with the scaling and see if that gives me anything different. Also looking to see if I can get a demo of another RIP
balstestrat
Problem Solver
Yeah I wonder if you are trying to chase a problem that doesn't exist.
Tell your support to rip your image then send you the raster file. At least you can see if they can process it correctly.
Tell your support to rip your image then send you the raster file. At least you can see if they can process it correctly.
Fair assumption based on the information you have. You only see the banding when you put a piece of optical plastic over an interlaced print - its not visible otherwise. Its a difference between the actual DPI of the machine and the LPI (lenticules per inch) of the optical plastic.
ColorCrest
All around shop helper.
No. You might read the Onyx manual or the printer manual to understand the process of printing the certain measured file, say a 500mm version, on the particular media you require to learn the offset factor to enter into the Onyx scale adjustment field.
My experience is most large format printers will initially print short of what the file is and especially the longer the file and the heavier the media. Therefore, a RIP will provide an option for adjustment.
Some of this has to do with the difference between inches vs mm and the fact of manufacturing drums / rollers tolerances along with specifying number values rounded for convenience. Example; the old "300dpi" was oftentimes really 304dpi.
What exactly are you trying to reproduce? A high frequency set of ruled lines in the design?
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Lenticular prints. I guess I need to see if Onyx is actually rounding the number they list mechanically or just in how they list it.