Hi ,
I want to shoot a JPEG photo of some old posters with my digital camera, then Square it up so it has 90 degree corners and change the size so it will print 28inch x 22inch wide.
I planned on putting the poster on the wall to take the photo , and I am sure it will not be "square"
And then I will have a set of 5 of then printed at the vinyl sign shop. 5 photos will make it about
10ft wide :)
So anyone know an online site to modify the photo and let me download the "fixed" JPEG
Thanks for your ideas
Rotate only lets you do a whole 90 degrees....
I guess the best way to explain it would be if you put a mark on all 4 corners of your poster and the software would see these marks and rotate the photo a few degrees to get it squared up .
I just do not think I will get it squared up when I take a camera photo of the poster , its going to be a few degrees off....
Thanks
In reply to californiamilleghia :
Although not online, Paint.net is free and will do fractional rotation.
If you want to just post the image, I can fix it if you want.
This one might work , it will do one degree at a time......
https://onlinejpgtools.com/rotate-jpg
Assuming you have a PC, did you try Microsoft Paint?
Otherwise, a couple good free photo editing applications are Gimp and Irfanview.
+1 for Gimp or Irfanview. Paint tends to use high JPEG compression which greatly reduces quality. I could do it for you if you send the pic to my username at gmail.
I would second the suggestion of paint.net but be watchful of the install process to make sure it doesn't sign you up for adware cr*p. It gives you the option of rotating by hundreths of a degree which can be useful for what you're doing. Whole degrees is pretty course. It can do a lot of other things and is much more capable than MS Paint (but it won't replace, say, Photoshop Elements, so it's somewhere between those two).
Some concerns and suggestions: You will want it well lit, but will also want to avoid any glare. Shooting it from as far away as possible with as much zoom as possible will reduce the distortion (and also require more light). White balance is also a concern. Make sure you camera is setting it properly for the light (that can be easily adjusted in programs like Photoshop, and I am sure Gimp).
Squaring up the photo is somewhat easy to do in Photoshop, but can get somewhat involved (e.g. making curved edges straight) so I suspect Gimp has that also.
Printing to that size you will probably want 300 dpi, buy might get away with 150 dpi +. Because of that you will want as much resolution as possible. For 28 x 22 inches, at 300 dpi, that is 8400 x 6600 pixels. Half that for 150 dpi of course. Of note, up sampling the photo to a higher dpi / pixels will do NOTHING for quality, so don't bother (unless you have to).
I might suggest taking multiple pictures an stitching those together, but I would not do that unless you have a program (e.g. Photoshop) that supports that automatically.
thanks everyone for all your advise ,
I am going to try and do it myself just to see if I can make it work , learning new skills :)
The Canon camera is 8 mega pixels , How do you convert mega pixels to DPI ?
Thanks
californiamilleghia said:
thanks everyone for all your advise ,
I am going to try and do it myself just to see if I can make it work , learning new skills :)
The Canon camera is 8 mega pixels , How do you convert mega pixels to DPI ?
Thanks
To convert pixels to DPI depends on the size you intend to print it out at...so for a 28x22" picture, if the resolution of the image was 2800x2200px, it would be printed at 100DPI. If you brought the print size down to 14x11" it would be 200dpi. Take a pic with the Canon and check the image resolution to get the exact dimensions in pixels - you can make a good guess assuming a 4:3 aspect ratio for the pictures but it's better to get exact numbers, sometimes megapixels are rounded off.
Talked to the sign printer and they print at 100 DPI
looks like I need to shoot at 8MP and when I square it up by chopping the edges I should be close.
Thanks
