how to change the dpi on a image?

Question

how to change the dpi on a image?

Answer 1

How To Change Dpi

Answer 2

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wording, if you have image at 72 ppi. and change to 150 ppi, that does change the default output of size for print, when you go to print, you can adjust image size to inches, or to dpi, you want to start with 150 ppi/ dpi not 72 ppi/ dpi, if you already have size at 72 ppi, then you can resize resolution to 150, but you will notice inches/ centimeters size, change from value to new value to say that if you have image size at 3x3 " at 72 ppi, (216 x 216 pixels ) then keep 3x3 " and reset to 150, the pixel WxH raises in pixels 450 by 450 pixels , those pixels carry over to dpi print size output for the same 3 inches, if you kept 216 resolution and and change 150 ppi, then the print size would lower to 1.5 inches via the dpi print quality, so it does change to pixel count per inches as is, or it changes the inches measurement per resolution count for pixel, if you save copy of image at 72/ 150/ 300, same pixels squared, then view print original size, you will notice smaller or larger placement per dpi, some tools can adjust dpi printout sizing, but some reach extended limit requiring resize/ resample for enlarging or shrinking extensively, ..

Answer 3

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RE:

how to change the dpi on a image?

I edited a picture and i need it to be 300 dpi. i edited on picnik.com. does anyone know how to change the dpi its at 180 dpi.

Answer 4

Irfanview Method:



download irfan view software from torrent



Load your image into Irfanview

Select the "Image > Resize/Resample" option

In that dialog window you'll see a specific DPI data box

Simply enter whatever DPI you want without adjusting anything else in that dialog window.

Click on the "OK" button

Your image DPI has now been set to whatever you want (leaving the pixel dimensions of the image unchanged).

Use "Save As" to save this photo with a new name - I suggest adding a -300dpi extender (i.e. "345-2365-300dpi.jpg") to identify this new DPI image.

See note below when saving to JPEG format

Answer 5

Hey there,

A good graphic editor program is GIMP. It works like photshop but it's free. Download it here: http://bitly.com/1zbn8Mu

Very useful program!

Answer 6

What your camera takes, or a picture editing program begins your program with does not matter. 300 or 180 is just the picture size that it was taken at. "The way the computer or the printer views the image."

ALL THAT MATTERS IS .PIC .GIF .JPG or JPeg .PSD or Photo Shop Document. Printers can't print PSD's with out An Adobe software that opened it first. Save as Gif to save space, JPG to keep details.

What you are concerned with is THE RESOLUTION SIZE. Any camera can take a photo or picture that can easily be edited and reformatted (changed) to become larger or smaller. The type of camera you have will determin the RESOLUTION CAPABILITY OF THE CAPTURE. Most camera's now call it, MEGA PIXELS. Most generic ameras are 1 to 2 and most phones are from 1 to 3.4. A professional camera can go way up to the abilities of a Photo Shop type program. Those big camera's with the large lenses and replaceable lenses. The ones that Magazines use to take pictures of their models and Home and Garden etc....



What you SPECIFICALLY are looking for is to

1. If you are creating a picture from scratch or editing one in any type of software, IS CREATING A NEW PROJECT, if you can.....not many PIC programs can do that. A picture editing program like you described will just show a photo the way the camera, computer, or printer, will be interpreting it's size, as the camera took it. And will not be able to make the picture any larger on it's own.



2. You need to bring the picture into a REAL PHOTO EDITING program, like Photo Shop, which answer two gave you. The first thing you want to do is OPEN A NEW PROJECT....NO MATTER WHICH PHOTO EDITING PROGRAM YOU ARE USING.



In the New Picture, or PROJECT, there is a place for the Resolution size.

BRING IT ALL THE WAY UP TO AT LEAST 300 TO 600. If you have a small Mega Pixel camera you want to make it 600. But remember, the resolution size means that the amount of detail per pixel is going to increase and the amount of pixels in the image will also be increased. "Basically your picture is being chopped up into 300 to 600 tiny pieces, no matter what the DPI rate is.



Then you want to increase the Bit Rate up to 16 bits. Most programs start you out at 8 bits which is the size of Super Mario on the Nintendo Entertainment System. You can't seriously intend to make anything meaningfull looking from 8 bits. So make it 16 or higher depending on your programs capabilities. If you can't see the bit rate, don't worry about it and continue.



3. PLACE, PASTE, OR DRAG, YOUR OPENED PHOTO INTO THE NEW LAYER.

HERE'S THE TRICK. Your picture may be small on your computer or large, depending on how good your camera and the computer's photo viewing abilities are. But when you bring it into a photo editing program, it will show up the actual size, and some photos come out very small or were saved small, and will show up tiny on the Photo Editing software. Don't worry. You can

EDIT

TRANSFORM

FREE TRANSFORM

Hold SHIFT down to preserve your picture's horizontal vertial balance and drag the corner square icon to make the picture larger.

If it was saved in a poor resolution, you may get a blured result. If it was saved in a good resolution, your picture will correctly ENLARGE in the right way and you can make it look any size you want it to.



If the resolution is poor to start and shows up small, there is nothing you can do to increase the size of that image without making it distort further.... Small resolutions that cannot be adjusted up.....only down. Only LARGE RESOLUTIONS WILL MAGNIFY WELL. Pictures all have a point where the resolution size will not become any larger than a certain point if enlarged. There is the possibility that you don't have Photoshop, I realize.

If you don't have a good Photo Editing software that is independant of any Picture Viewing Primary Function, you need a Scrap Book, or Picture Album program that is designed to save your pictures and edit them.

A program like this is designed specifically for people who have no clue about Photo Editing and are purposely made to assist you with CUT'S, PASTES, ADJUSTMENTS, ENLARGEMENTS, REDUCTIONS, AND MERGING. You can edit and make other adjustments a lot easier with these programs



RESOLUTION AND BIT RATE ARE WHAT YOU SHOULD BE LOOKING FOR.

And remember, something saved too small a resolution will remain at that resolution.

You want to end up with a GIF. or a JPEG that has a resolution of at least 300 and a bit rate of at least 16. They are easily re-editable!!

Answer 7

Retake the picture. Once it's 180 dpi, you can change the resolution to 300 with a graphics editing program but it'll do absolutely nothing useful and may even make the picture look worse as the software would have to interpret new pixel blocks.

Answer 8

You can interpolate (uprez) in any good editing program. Just do it in steps. You would do your image like this. 180 -> 270 -> 300.

Answer 9

Oh me, here we go again.



No, your photo is NOT 180 dpi. It is not 300 dpi. You cannot make it ANY dpi. dpi means DOTS PER INCH and is a PRINTER function. It has NOTHING to do with your digital file. All digital cameras output their files at a PPI number.... PIXELS PER INCH. Your camera, and many others, output at the 180 number. It is basically a meaningless number. The overall SIZE of the photo is what matters. In other words, your camera may output an image that is 20 inches by 17 inches at 180 ppi, but when "resized" to 300 ppi, the photo size will drop down to say 16 inches by 12 inches. (Those size numbers are just for example, they are not technically accurate).



When a photo is submitted to a printer, (most printers), the photo is output at 300 dpi, (dots per inch). It makes no difference if you submit a photo that is 180 ppi, (pixels per inch), or 300 ppi, or 50 ppi, or 800 ppi. What matters is that you have an overall large enough photo for a quality print at whatever size you desire. The ppi will take care of itself, and the printer is going to print at 300 dpi regardless.



Now, many places who really should know better will give you this bologna that they have to have a photo that is 300 dpi. They do not know what they are talking about, but to pacify them, you can change your photo's PPI number to 300 in any competent editing program, such as Photoshop or GIMP.



Taking the picture over again is an incorrect answer. Any photo you take is going to be 180 PPI out of your camera, but again, it is basically a meaningless number.



If you have to have a 300 ppi number showing to please someone who does not understand all this, then you would use the resize function in Photoshop for instance. You would change the resolution number, which will be 180, to 300 ppi. You would NOT check resample image. You would see the physical dimension size of the photo change, but you are not doing any changing, or harm, to the pixels. You are simply placing 300 of them per inch in the photo instead of 180. It is still the same TOTAL AMOUNT of pixels, they are just being placed closer together and thus the photo will become smaller.



If all else fails, just send me the photo and I will make it 300 PPI for you. Again, you, and no one else can make any photo ANY DPI number. PPI and DPI are apples and oranges, and you are only controlling the PPI.



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