Photographing and Printing objects on actual size

Is there a guide on how to photograph and then print object at their actual size on A4 paper?
I've searched but there's nothing in particular that show a way on how to do that.
Anyone can help with this?

 

No answers in your printer settings/manual ?

 

Should be plenty of info @ deviantart about printing HQ stuff at alrger sizes.

 

But i dont want to print at larger size....just at its actual size.

 

Here's a "howto", dear haydaddict.

1. Measure the real object (e.g. a glass, let's say 17 cm) -> variable A

2. Take a well-focussed, well-lighted picture with your camera:
a) It must be taken almost perpendicular to the length of the object so that its length isn't distorted by perspective.
b) In the picture, leave a little bit of space above and underneath the object.

3. Measure the size of the picture (in pixels or cm on-screen, e.g. 28 cm) -> variable B

4. Measure the size of the object in the picture (in pixels or cm on-screen, e.g. 22 cm) -> variable C

5. Set the height of your picture in your favourite programme (could be something as simple as MS Word) to the following size:

A*B/C (in our example: 17*28/22=21,64 cm)

6. Print it out - voilà! (you're welcome).

 

So there's nothing actually to do by default.....

 

it depends on the dpi your camera and printer are set at. (Sorry, I had assumed you were printing a big life-size pic of Hayden)

http://en.wikipedia.org/wiki/Photo_print_sizes

http://www.printcalculator.com/

 

He's printing out a lifesize Hayden.

Print me a Natalie Portman.

 

Only if it's a 3-D printer

 

printing 'lifesize' is nothing more than the maths of image resolution to actual size. physical measurements (cm, inches) don't really exist in computers or monitors the way you might think they do. even where photoshop allows you to work in cm or inches, the dpi of the image is still the determining factor when you actually come to print it. (but not printer dpi, that's different. confusing i know) in essence, an image 10 pixels in width could be printed 10 inches wide with an image res of 1dpi, but it's gonna look like shit

if an image is 3000px in height...

at 300dpi it will be 10 inches long.

at 150dpi it'll be 20 inches long.

at 600dpi it'll be 5 inches long.


however, a bit more info would help Hayd because perspective plays a part, as does whether there's a background to the subject or if it's to be cut out (digitally or physically). an accurate example of what you want to do would provide a much more (if not completely) accurate process

 

There are old guides to getting things 1:1 on the negative, but I don't think they'd be any help in the era of digital photography and anyway it's the print that matters to you, not the original size on the sensor.

You could get to 1:1 empirically, by doing some test prints and honing in on the right size through trial and error, but the best method will involve a little maths. It's very easy maths so no need to panic

Once you've taken your photo measure the size of whatever it is in the original high-res picture (Photoshop allows this, I presume GIMP does too if that's what you use). Then it's just a matter of working out the percentage needed to scale the item up or down to print out at real size.

There's a very simple sum that'll help here: percentage equals required size x100 over original size.

Now unfortunately some printers aren't great at printing out exactly at the size they're supposed to, so you may still need to tweak just a bit to get the printout dead-on if you need it really accurate. But the sum will get you damned close in a single step.

Not confusing at all Lukin — printer res is expressed in DPI, but image res in PPI :22:

 

DPI = dots per inch

PPI = pixels per inch

:22: as well

 

I'm afraid that you will have to know the exact dimensions of the thing on the photo, however when you know that some printers have a setting that allows you to print one image on several (as many as it takes) A4 papers with a line to cut away before taping them together.