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Black and White Print Pixels

Guest
Oct 23, 2021 Oct 23, 2021

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Do you think low resolution black and white printed images would make bad pixelation a little less more noticeable. Obviously the number of pixelation would be the same with the color version.

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correct answers 1 Correct answer

Adobe Community Professional , Oct 23, 2021 Oct 23, 2021
Depending on the printing process the image pixels will normally be obscured by the output screening—usually halftone screens for offset printing or stochastic screening for inkjet. A color offset print would be made with 4 halftone screens at different angles, so the visible output would be a rosette pattern, while black & white output would be a single screen usually at 45 degrees, so the visual appearance would be somewhat different: 300ppi at 150lpi halftone 72ppi at  150lpi halft...

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Adobe Community Professional ,
Oct 23, 2021 Oct 23, 2021

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@Deleted User wrote:

Do you think...


 

Without seeing the two images, my instinct is to think that bad pixelization will be noticeable in both color and black & white.

 

~ Jane

 

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Adobe Community Professional ,
Oct 23, 2021 Oct 23, 2021

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Resolution is just a printer setting, PPI is pixels per inch it set the size the printed prints your pixels. The quality of an image depends on the quality of the pixels you have and the quantity of the pixels you have.  You need a lot of pixels if you want a highly detailed image.  These pixels need to be high quality pixels you get from a good sensor  with a properly focus high quality lens with  sufficient light for a  good exposure.  You can not manufacture high quality Pixels by resampling an image you have few pixels for so you have a lager higher quality image.   You can not crop a eye from a portrait image, resample it up in size and expect to see a highly detailed image of the reflected image of what the eye was seeing viewing. I can see she was looking at her brother and the were trees in the background however the image quality is not there. There are too few high quality pixels.

Capture.jpg

You loose image quality if you resample.  Up or Down you either through away details you have or makeup details you do not have.

 

JJMack

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Adobe Community Professional ,
Oct 23, 2021 Oct 23, 2021

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Depending on the printing process the image pixels will normally be obscured by the output screening—usually halftone screens for offset printing or stochastic screening for inkjet.

 

A color offset print would be made with 4 halftone screens at different angles, so the visible output would be a rosette pattern, while black & white output would be a single screen usually at 45 degrees, so the visual appearance would be somewhat different:

 

300ppi at 150lpi halftone

 

Screen Shot 3.png

 

 

72ppi at  150lpi halftone:

 

 

Screen Shot 4.png

 

 

 

 

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Guest
Oct 23, 2021 Oct 23, 2021

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Thank you. After researching the terms you described and with your help I have a lot better understanding. Thanks again Rob.

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