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Post by jjtrinva on Mar 5, 2017 17:59:05 GMT
I'm interested in batch processing a number of photos to 1) convert to TIFF and 2) change resolution to 300 PPI.
However, when I use the File -> Process Multiple Files dialogue, it also resamples the image to a much larger size which I want to avoid since that adds computer generated pixels.
If I unclick resize image, then it will convert to TIFF but not change the resolution.
Am I missing something or is this a limitation in the program itself? While I'd prefer to stay within one program, I'm open to using other batch processing software since it will be a big time saver in the long run.
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ken1
Junior Forum Member
Posts: 83 
Open to constructive criticism of photos: Yes
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Post by ken1 on Mar 5, 2017 18:15:51 GMT
What happens when you attempt to do this in 2 steps:
A. Convert file type to TIFF
B. In the dialog, leave the size fields blank, check "constrain proportions", and indicate 300 dpi (that should really be 300 ppi for the cognoscenti)
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Post by michelb on Mar 5, 2017 19:40:48 GMT
I'm interested in batch processing a number of photos to 1) convert to TIFF and 2) change resolution to 300 dpi. However, when I use the File -> Process Multiple Files dialogue, it also resamples the image to a much larger size which I want to avoid since that adds computer generated pixels. If I unclick resize image, then it will convert to TIFF but not change the resolution. Am I missing something or is this a limitation in the program itself? While I'd prefer to stay within one program, I'm open to using other batch processing software since it will be a big time saver in the long run. It seems that the process multiple files dialog allows you to do it: - first you check the 'resize' option which makes the ppi available - after that, you unchek the 'resize' option. That means there is no resampling (no added/removed pixels) but the dimensions in in/cm are changed accordingly. The ppi setting stays checked. Yes, the unit is shown as 'dpi'... I agree with Ken1 that it should be 'ppi'. |
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Post by jjtrinva on Mar 5, 2017 22:39:38 GMT
What happens when you attempt to do this in 2 steps: A. Convert file type to TIFF B. In the dialog, leave the size fields blank, check "constrain proportions", and indicate 300 dpi (that should really be 300 ppi for the cognoscenti) So I gave this a try and unfortunately it didn't work. Step A was fine. With "Resize Images" unchecked, the files converted to TIFF with no issues. Step B. With "Resize Images" checked; size fields blank; "Constrain Proportions" checked; Resolution 300 ppi - the image size jumped from 4592x3448 to 7653 x 5747 (and from 47.5 MB to 132 MB). I get your point about ppi vs. dpi, but the dialogue box says dpi so I was simply using that for consistency. |
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Post by jjtrinva on Mar 5, 2017 22:44:08 GMT
It seems that the process multiple files dialog allows you to do it: - first you check the 'resize' option which makes the ppi available - after that, you unchek the 'resize' option. That means there is no resampling (no added/removed pixels) but the dimensions in in/cm are changed accordingly. The ppi setting stays checked. Yes, the unit is shown as 'dpi'... I agree with Ken1 that it should be 'ppi'. Tried this as well. The Image Size doesn't change, but neither does the dpi/ppi -- still at same as it was when exported from the camera. Seems to be a limitation within the program. |
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Post by michelb on Mar 6, 2017 7:51:23 GMT
I just tried the free Faststone Photo Resizer: it has the ability to change both file type and dpi while keeping the pixel count (no resampling) and adjusting size in in/cm accordingly.
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Post by jjtrinva on Mar 6, 2017 16:36:38 GMT
I just tried the free Faststone Photo Resizer: it has the ability to change both file type and dpi while keeping the pixel count (no resampling) and adjusting size in in/cm accordingly. Darn. Looks perfect, but will not work on Mac. |
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Post by michelb on Mar 6, 2017 16:57:01 GMT
I just tried the free Faststone Photo Resizer: it has the ability to change both file type and dpi while keeping the pixel count (no resampling) and adjusting size in in/cm accordingly. Darn. Looks perfect, but will not work on Mac. I am not a Mac user, but you might have a look at Irfanview... or similar: alternativeto.net/software/irfanview/?platform=mac |
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