I am trying to resize a photo

Hi Bailey,

The reason I need to resize is there is a forum I post pictures to requires the images not to be over 1600 pixels either side.

Hi

One thing to add —
In the Image Size dialog, the Document Size options can be selected in Preferences>Units & Rulers.  In other words, if you have chosen your RULER to display inches, the Document Size displayed in Image Resize will display inches.

Hi Pete,

I am aware to be cautious to make sure I choose the proper VALUE to be able to work with Pixels and not choose the wrong value such as Inches, but it never hurts to be sure the people you are helping know what they are doing.

Thank you Pete!

Major,


Thank you!  You are right it looks like to me

Bailey,

Thank you

I have one clarification question, do I use Resample Image for both online screen display, and for document size for printing?

No problem Inspeqtor.

For screen display I usually resample an image to fit inside ~2000px x 1000px since my screen is 1980px x 1080px.

If someone uploads an image larger than the viewer's screen size, then I don't see why it would be unreasonable for the viewer to download the image and view it at 100% or do whatever they like with it since viewing at 100% is the only way they can see every pixel in an image that is larger than their screen.

Keep in mind also, every browser will downsize a large image to whatever width and/or height the creator of the web page the image is displayed on has assigned to the image in the web page's CSS (Cascading Style Sheet).  So uploading large images is really a waste of time and resources unless you are happy for anyone who wants the image to simply take it free of charge.

For printing purposes, I don't resample an image at all.  Keep in mind that every time you resample an image for any purpose you run the risk of image degradation because you are adding or removing pixels and changing their rgb values.  Degradation of sharpness is typically one example depending on the amount of resampling.

Every ink jet printer will have its own native printer resolution.  That is just the way ink jet printers work.  Epson typically has a native print resolution of 360ppi or 720ppi for high end printer settings while Canon, HP and I suspect most other printers have a native resolution of 300ppi.  

You can optionally resample an image to your printer's native resolution (in PSE or whatever) or you can let the printer resample an image that it is not at the printer's native print resolution to its native print resolution prior to printing as part of the printing process.

Personally, my workflow for printing is this:

1.  I use the Rectangular Marquee Tool to select the part of image I want to print using the aspect ratio of the paper I will be printing on.

2.  Select Image->Crop from the main menu to make a 100% crop.

3.  I then select Image->Resize->Image Size and I make sure the Resample checkbox is unchecked.  I don't want to resample the image.

4.  I then set the Document Size width or height to the paper size in mm.  The other paper dimension and resolution are then automatically calculated for you.  I check that the calculated other dimension is correct and check that the resolution is close to 360ppi.  My Epson SC P600's native print resolution is 360ppi and 720ppi at the higher print settings.

As long as the calculated PPI is reasonably close to (either larger or smaller than) 360ppi then I am happy because I know there will be minimal resampling by the printer driver prior to printing.  Depending on the contents of the image you can get away with calculated ppi's as low as 200ppi and still output a reasonably good quality print.

I am happy to let my Epson printer driver do the resampling of an image to the printer's native print resolution as in my testing I see very, very little difference in the print quality if I do the resampling of the image to the printer's native print resolution in PSE prior to printing.

HTH.........if not clear, please post back.