How to check whether it is a 300 dpi photo or not?

[gomcse]

I have just using my scanner with a bundle software and scan a photo using true color mode with 300 dpi and then save it as a tif (tiff) file. May I know how can I validate whether that scanned photo is a picture with 300 dpi ??

Please advise.

[qball]

define "300 DPI", else you won't ever know.

yeah,yeah,yeah, three hundred dots per inch.

define "true color mode".

[Cygnus-X1]

Right click on the image file, then choose properties--then select "image properties" tab. It should say Resolution 300 X 300 dpi.
(there is also a ton of other useful info there too!)
If it is or some other resolution.
You can also check it if you open the file in a paint program such as Paintshop Pro or Adobe Photoshop.
If you have any problems post back.

[This message has been edited by Cygnus-X1 (edited 06-27-2001).]

[qball]

dpi, is a relative reference and this adds much confusion. Only certain formats have this attribute and only certain apps use.

For example, open up a given image in PSP. How many dpi? wait, now zoom image either way (bigger/smaller). What dpi now young Jedi?

[Cygnus-X1]

gomcse,

Were you able to figure it out???
Just curious.

[radbasa]

Most consumer scanners today run a true optical 300dpi. Above that their drivers use software interpolation (the same as in Photoshop when enlarging an image's pixel size).

What are you going to use 300DPI images with? If you're just going to use it on the web 96dpi is fine. On inkjet printers, even those that claim 1440dpi, a 150dpi image will print without any huge difference from a higher dpi setting as long as you don't resize the printed image. High dpis are used in photoediting to have as much image data as possible but the end product is usually at lower dpis.