|
Title: Qimage shows "Image Read Error" on Large Tiff Post by: mflum7 on May 29, 2017, 03:00:21 AM When loading a Large Tiff "23x34 @ 600 PPI 13854 x 20753, ITPC, ICC: sRGB.icm" i get a IMAGE READ ERROR. Yet the image loads fine in Photoshop CC 2017.
Photo is too large to attach 473,383,740. Please let me know of a place to upload the file. Michael Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: Fred A on May 29, 2017, 11:17:49 AM Quote Please let me know of a place to upload the file. Michael, I use (free) www.wetransfer.com Send it to wathree.ssz@verizon.net. I'll see that Mike gets it. Fred Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: admin on May 29, 2017, 12:51:38 PM At 8 bits/channel with no alpha channels, that's an 862MB image. That in itself is fine but is the image 16 bit and/or does it have alpha channels? 1GB is about the limit for image size in QU.
Regards, Mike Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: Ernst Dinkla on May 30, 2017, 08:59:16 AM When loading a Large Tiff "23x34 @ 600 PPI 13854 x 20753, ITPC, ICC: sRGB.icm" i get a IMAGE READ ERROR. Yet the image loads fine in Photoshop CC 2017. Photo is too large to attach 473,383,740. Please let me know of a place to upload the file. Michael Sometimes when a Tiff has some Illustrator/Indesign origins or is converted on color space there can be a flag in it that still says CMYK. Saving it again from Photoshop can help. A conversion to JPEG at highest level (no loss) save and back to Tiff and save can help. Or use another program like Photoline to save the Tiff from. It is not always just the size or alpha channels in my experience. Met vriendelijke groet, Ernst http://www.pigment-print.com/spectralplots/spectrumviz_1.htm March 2017 update, 750+ inkjet media white spectral plots Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: Fred A on June 02, 2017, 07:22:12 PM Quote When loading a Large Tiff "23x34 @ 600 PPI 13854 x 20753, ITPC, ICC: sRGB.icm" i get a IMAGE READ ERROR In reality, the image size was 26044 x 21152 x 3 = 1.6 gigabytes; too large for Qimage which will handle a little over 1 gigabyte. Simply reduce the unnecessary 600 ppi to 300 ppi and it works. Fred Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: mflum7 on June 03, 2017, 06:46:46 PM Thanks. You are correct the pixel sizes were incorrect ( i know better than to multi-task)
History: The original image is 6x6 on 120 film. It was scanned on an Epson Perfection 4990. It loads into Photoshop correctly but not Lightroom (a bug report was submitted and they told me they would fix it for the next release) I was able to print it using some expensive RIP software, but being a small business I wanted to reduce costs. The "23 x 34" is my minimum size. Using the 600 ppi was to prevent pixelation on the larger sizes, so reduction to 300 ppi was not an option I was looking for. Title: Re: Qimage shows "Image Read Error" on Large Tiff Post by: admin on June 04, 2017, 04:29:09 AM Thanks. You are correct the pixel sizes were incorrect ( i know better than to multi-task) History: The original image is 6x6 on 120 film. It was scanned on an Epson Perfection 4990. It loads into Photoshop correctly but not Lightroom (a bug report was submitted and they told me they would fix it for the next release) I was able to print it using some expensive RIP software, but being a small business I wanted to reduce costs. The "23 x 34" is my minimum size. Using the 600 ppi was to prevent pixelation on the larger sizes, so reduction to 300 ppi was not an option I was looking for. Fred passed along the image and the image itself doesn't contain anywhere near enough information to warrant the resolution being used. It starts to break down at about 25% zoom and at 50% (1/4 the file size), it's just blurry and grainy. Meaning... you could easily cut that file down to 1/4 the size (about 13000 x 10500) and not see any difference at all in the final print. If you reduced to that resolution and printed at the same size in QU, the QU print will be as good or better than the RIP you used. Mike |