The Preflight tab in the Print dialogue often says "Image resolution below 96 dpi" when the Object Properties panel shows all the images to be well over 96 dpi. I just checked this by making a new doc with one image. What's the story?
Thanks,
Janet
FYI, the dpi value is a bit misleading and not of any real value. What's important is the number of pixels.
Example: A 72 dpi image that is 48" x 24" contains 3,456 x 1,728 pixels, and even though the resolution is low there is quite a lot of information.
A 600 dpi that is 4" x 2" contains 2,400 x 1,200 pixels, and is therefore in fact an image with a lower resolution than the 72 dpi image at a given size.
In Draw, and other vector programs, the information about resolution for an imported image is of no importance because a vector drawing has no resolution and therefore no pixel grid that the image must fit into.What is important though, is the physical number of pixels.Side note: Many bitmap formats have information about resolution embedded, while some file formats don't (GIF for example).If you import a file without this information I think Draw defaults to 72 dpi. This doesn't mean that it will be "destroyed" in any way. The original number of pixels will still be there and the image will be bigger on screen.
One more thing, pictures from my 10.1 megapixel digital camera are 180 dpi.
Hi Janet,Ronnie has this perfectly correct.Let me add.1. dpi is printer's jargon for dpi per color. It's identical to ppi in CDGS.2. Here's the size dialog in PP from my camera. It's completely misleading. So is the similar dialog in Photoshop.-- There is nothing in the scene or in my camera which is 72 dpi (aka 72 ppi).-- There is absolutely nothing in the scene or in my camera which is 55 x 41 inches.Pixels by pixels is the fundamental unit for raster images. For cameras, it's formed by a rectangular array of light sensitive diodes on the CCD. This array corresponds exactly to a pattern of tiles. Each element (pixel, tile) consists of three light sensitive diodes (red, green, and blue). Thus each pixel (tile) gets one out of 16.7 million colors.So what happens when you want to print the image. People want to know the physical size of the print which they will receive. Some people would like to know the resolution.So now, you have to be careful about the size dialog. YOU CAN NOT CHANGE PHYSICAL SIZE AND RESOLUTION at the same time. They are linked together by the basic pixels by pixels of the image. I don't know anyone who wants a 55 x 46 inch print to keep in their wallet. So first off, you specify the size in that dialog. As soon as you change the physical size, the dpi pops out to a new value. That's life.
If you own a calculator and remember algebra, here's the relationships between pixels, dpi, and physical size.
total number of pixels = (dpi x width) x (dpi x height)
You're stuck with the total number of pixels. You can change either width and height or dpi but not both.
Of course you can "resample" the image to change the total number of pixels (tiles). However, it is then no longer the same image.
I no longer have X5 on my computer so I can't comment if what you see is a bug or if that's what the printer driver will do. You'll find out from the size of the print when you print.
Phil
Janet Berg said:there should be some way to coordinate the Preflight tab data