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620 Points
Mon, Nov 26, 2018 1:12 PM
Photoshop/Lightroom: Are Resolution outdated?
Are resolution outdated?
Dpi or Ppi or pixel numbers.
25 years ago we had a screen resolution of 25 Ppi and Apple printers in 640 Dpi.
Today we have screens/tablets/phones of more than 300 Ppi and the best printers use 4800 Dpi or more.
Dpi (Dotper Inch)
Historically I think that ”resolution” came from the graphic industry who was the first customers in digital imaging. Also bringing too many saying Dpi, when it correctly is Ppi.
Even Dpi is completely outside the Adobe workflow, since Dpi means ”Dots” (Spots of Paint) per Inch.
This ”painting” process works only in laser-, plotter- and ink-jet printers.
The printer dedicaded software translate the digital picture to the Dpi needed.
The offset and gravure printing process use Lines per Inch. With the ”Dot” size depinding on the physical quality of the paper quality. Translating the Pixels from the digital image demands 1,5-2 Pixels per printing dot. The lines are builded on a separate printing software totally outside Adobe.
So the use of Dpi should today completely be avoided in digital imaging, since this is the mother of confusion.
Not any single program, or working together in the Adobe Creative Suite needs Dpi.
So get Dpi totally out of the Adobe world!
Ppi (Pixelper Inch)
Has been the standard for ”resolution” in the Adobe CC package.
A new blank A-4 Page in Photoshop or best quality In-Design are 3508 x 2480 Pixels in 300 Ppi.
If you, in Image Size change witouth resamling, the pixel dimensions are the same in 72 og 1600 Ppi.
But what is ”resolution” and resolution for what?
To what purpose today do we need the resolution since the ”real” picture/document quality is the pixelsize of the original digital picture t.ex. 8256 x 5504 pixels for the Nikon D850.
All picture quality refer herefrom to the 8256 x 5504 pixels whatever the resolution.
If you crop it for web to ex. 680x450 Px the picture on the page are exacly the same in 300Ppi as in 72 Ppi.
Export/Save the same RAW picture in 2, 72 and 300 Ppi and in Lightroom and Photoshop the all have the sam file size andwill bee shown exactly the same way in 1:1/100% or 3:1. Even dragging the 72 PPi pict. to the 300 Dpi page in Photoshop.
Exporting to a webpage or PowerPoint do not any more ned to be changed to 72 Ppi (96 on Win).
The pixel dimension/number of pixels XxY are in fact the the real quality, not the resolution, and the are in fact no Ppi resolution in the imported picture.
Are the resolution just a service function we do not need any more?
When exporting to an ink-jet printer you get the same quality of print of sam size if your picture are in 2, 72 Ppi or i 300 Ppi if it has to be printed in the same paper size size. It is the pixels numbers XxY that counts.
Here in Scandinavia the demands for delivery for digital til the printhouses and professional Press Photographers printing A-4/Letter.
Before it was ”Deliver you photo as Tiff, jpg Max. 25 Mb, RGB, 300 PPi”
Today it is ” 3500 Pixels on longest side. Jpg best quality” (No resolution named)
What if Adobe completely removed the PPI box?
In Lightroom and Photoshop nothing will happen, and it will be more easy to understand the digital imaging quality and working process. Actions in Photoshop could easily be changed to refer to pixel numbers.
In InDesign, working for both print and screen, it will be a better platform to get a perfect quality for best purposes. But demands a exellent logic explanation, since users are the most conservative ones.
The number of pixels XxY, bit dept and dynamic range in the digital documents are for me the only item in todays Adobe workflow.
That said. I ́m educating 400+ in digital imaging in many different types of jobs, and the explanation of picture size and ”resolution” are the most confusing to understand. (Colour managment in CC are more easy to teach) – so my resolution to bring the ”resolution” to the scaffold makes me sleep better and gives more logic.
Vagn-Ebbe Kier/kierphoto.com
25 years ago we had a screen resolution of 25 Ppi and Apple printers in 640 Dpi.
Today we have screens/tablets/phones of more than 300 Ppi and the best printers use 4800 Dpi or more.
Dpi (Dotper Inch)
Historically I think that ”resolution” came from the graphic industry who was the first customers in digital imaging. Also bringing too many saying Dpi, when it correctly is Ppi.
Even Dpi is completely outside the Adobe workflow, since Dpi means ”Dots” (Spots of Paint) per Inch.
This ”painting” process works only in laser-, plotter- and ink-jet printers.
The printer dedicaded software translate the digital picture to the Dpi needed.
The offset and gravure printing process use Lines per Inch. With the ”Dot” size depinding on the physical quality of the paper quality. Translating the Pixels from the digital image demands 1,5-2 Pixels per printing dot. The lines are builded on a separate printing software totally outside Adobe.
So the use of Dpi should today completely be avoided in digital imaging, since this is the mother of confusion.
Not any single program, or working together in the Adobe Creative Suite needs Dpi.
So get Dpi totally out of the Adobe world!
Ppi (Pixelper Inch)
Has been the standard for ”resolution” in the Adobe CC package.
A new blank A-4 Page in Photoshop or best quality In-Design are 3508 x 2480 Pixels in 300 Ppi.
If you, in Image Size change witouth resamling, the pixel dimensions are the same in 72 og 1600 Ppi.
But what is ”resolution” and resolution for what?
To what purpose today do we need the resolution since the ”real” picture/document quality is the pixelsize of the original digital picture t.ex. 8256 x 5504 pixels for the Nikon D850.
All picture quality refer herefrom to the 8256 x 5504 pixels whatever the resolution.
If you crop it for web to ex. 680x450 Px the picture on the page are exacly the same in 300Ppi as in 72 Ppi.
Export/Save the same RAW picture in 2, 72 and 300 Ppi and in Lightroom and Photoshop the all have the sam file size andwill bee shown exactly the same way in 1:1/100% or 3:1. Even dragging the 72 PPi pict. to the 300 Dpi page in Photoshop.
Exporting to a webpage or PowerPoint do not any more ned to be changed to 72 Ppi (96 on Win).
The pixel dimension/number of pixels XxY are in fact the the real quality, not the resolution, and the are in fact no Ppi resolution in the imported picture.
Are the resolution just a service function we do not need any more?
When exporting to an ink-jet printer you get the same quality of print of sam size if your picture are in 2, 72 Ppi or i 300 Ppi if it has to be printed in the same paper size size. It is the pixels numbers XxY that counts.
Here in Scandinavia the demands for delivery for digital til the printhouses and professional Press Photographers printing A-4/Letter.
Before it was ”Deliver you photo as Tiff, jpg Max. 25 Mb, RGB, 300 PPi”
Today it is ” 3500 Pixels on longest side. Jpg best quality” (No resolution named)
What if Adobe completely removed the PPI box?
In Lightroom and Photoshop nothing will happen, and it will be more easy to understand the digital imaging quality and working process. Actions in Photoshop could easily be changed to refer to pixel numbers.
In InDesign, working for both print and screen, it will be a better platform to get a perfect quality for best purposes. But demands a exellent logic explanation, since users are the most conservative ones.
The number of pixels XxY, bit dept and dynamic range in the digital documents are for me the only item in todays Adobe workflow.
That said. I ́m educating 400+ in digital imaging in many different types of jobs, and the explanation of picture size and ”resolution” are the most confusing to understand. (Colour managment in CC are more easy to teach) – so my resolution to bring the ”resolution” to the scaffold makes me sleep better and gives more logic.
Vagn-Ebbe Kier/kierphoto.com
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olivier_van_bellinghen
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walter_gronli
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andrew_rodney
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http://www.digitaldog.net/files/Resolution.pdf
Photoshop and other Adobe app's provide a means to print and printers produce dots so DPI in that context is fair game.
PPI tells us about the pixels that make up our images and are also fair game.
All one needs to do (ideally) is simply use DPI when dots are a factor and PPI when pixels are a factor or not use I for inch if you're using another metric of measurement (Pixels per color management).
Author “Color Management for Photographers"
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john_nielsen_6237965
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JohnMacLeanPhoto
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Are you sure about that?
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