Black and White Print Pixels

[Guest]

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.

[jane-e]

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@Deleted User wrote:

Do you think...

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

~ Jane

[JJMack]

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.

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

[rob day · Accepted solution]

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 halftone:

[Guest]

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