Having a problem upsizing an image - Can you help?
Posted: Tue Jan 11, 2022 12:09 pm
I have received an order for a large size print (70x48) and am having difficulty upsizing it to the needed size.
The image was taken with a GFX50s, native size for RAW file is 8256 x 6192 pixels and 112 MB.
I converted, cropped, and edited the RAW file in Capture One Pro 22 and exported it to PS as a TIF file sized at 6908 x 4795 pixels @ 360 ppi (19.3" x 13.3") and 189 MB.
I did additional editing in PS and saved as a TIF file sized at 6908 x 4795 pixels @ 360 ppi and 505.46 MB (unflattened & unsharpened). For comparison later, I also saved a JPG of the image @ 1800 pixels long side>
To open the file in Gigapixel, I flattened it (189.56 MB) and saved it, then opened it in GP.
I upsized the file to 25,200 x 17280 pixels (70" x 48") @ 360 ppi.
Here is where the problem arises. The file is now too large to save as a TIF. Since GP cannot save as a PS Large Document, the only other options GP provides is JPG, PNG, and DGN. So, I save as a PNG.
When I open the saved PNG file, I get 3 options – 1. Leave as is (Don’t Assign) 2. Assign working Gray: Gray Gamma 1.8 (It’s a B&W image). 3. Assign profile (of my choice)
I have opened the file using all three options (for option 3, I have chosen Gray Gamma 2.2, and sGray. Regardless of which option I’ve chosen the image does NOT look the same as JPG I saved for comparison purposes.
What am I doing wrong, and why isn’t the image looking the same as the comparison image I saved in my earlier step? How can I correct this problem? Should I reduce the ppi from 240 vs. 360 in Gigapixel?
The image was taken with a GFX50s, native size for RAW file is 8256 x 6192 pixels and 112 MB.
I converted, cropped, and edited the RAW file in Capture One Pro 22 and exported it to PS as a TIF file sized at 6908 x 4795 pixels @ 360 ppi (19.3" x 13.3") and 189 MB.
I did additional editing in PS and saved as a TIF file sized at 6908 x 4795 pixels @ 360 ppi and 505.46 MB (unflattened & unsharpened). For comparison later, I also saved a JPG of the image @ 1800 pixels long side>
To open the file in Gigapixel, I flattened it (189.56 MB) and saved it, then opened it in GP.
I upsized the file to 25,200 x 17280 pixels (70" x 48") @ 360 ppi.
Here is where the problem arises. The file is now too large to save as a TIF. Since GP cannot save as a PS Large Document, the only other options GP provides is JPG, PNG, and DGN. So, I save as a PNG.
When I open the saved PNG file, I get 3 options – 1. Leave as is (Don’t Assign) 2. Assign working Gray: Gray Gamma 1.8 (It’s a B&W image). 3. Assign profile (of my choice)
I have opened the file using all three options (for option 3, I have chosen Gray Gamma 2.2, and sGray. Regardless of which option I’ve chosen the image does NOT look the same as JPG I saved for comparison purposes.
What am I doing wrong, and why isn’t the image looking the same as the comparison image I saved in my earlier step? How can I correct this problem? Should I reduce the ppi from 240 vs. 360 in Gigapixel?