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28 votes

How do I make my image comply with the requirements of this photography competition?

"we may require the originals of the awarded photographs to be submitted by the relevant participants, with a short side of minimum 2200 pixels and bit depth of 300 dpi." and " ...
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  • 167k
24 votes

Is there a general formula for image size vs. print size?

I'm going to sort of disagree with all the other answers that talk about DPI or PPI rules of thumb, and suggest two different 'rules' (based on PPD, from another answer of mine) Rule 1 — The 'Retina' ...
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  • 5,594
14 votes
Accepted

Can a blind person resize a photo independently?

The image I uploaded was rejected because it was under 300 DPI. The DPI is just a number which has no relevance to a digital image. It relates only to printing and not the quality or resolution of ...
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10 votes
Accepted

How should I specify minimum quality requirements for images submitted to my image archive?

Image resolution/pixel dimensions are the attributes you should probably be looking for. To find out what numbers you should specify in your requirements, you'll need to decide on the maximum size ...
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7 votes

Is 4288 X 2848 pixels an unfriendly ratio for quality printing and framing or am I missing something?

The idea that you will get better prints at exactly 300dpi — where one dot is also one pixel — is a misconception. There may have been a limited time and certain circumstances where it was true, but ...
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  • 140k
6 votes

Is there a way I can scan an A4 photo at 4800 dpi?

Oh my. Why on earth would you need to scan something at 4800 ppi? That would give you a file of 39840x56160 or a 2,237 Megapixels... a really pro normal digital shoot has rougly 80 to 100 Megapixels (...
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  • 20.7k
6 votes

How should I specify minimum quality requirements for images submitted to my image archive?

Imposing a minimum DPI value is meaningless as images do not have any intrinsic physical dimension. A better approach is to work out the maximum size you want to guarantee to be able to print, work ...
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  • 117k
6 votes
Accepted

Any reason not to set ALL photos to "300dpi"?

You understand the situation (that dpi number does not affect the pixels), and in this situation (before considering actually printing the image), always setting 300 dpi is a good politically correct ...
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  • 12.5k
5 votes
Accepted

How many printed dots are needed to represent a pixel with an inkjet printer?

I have written a more elaborate post in Spanish here, which Google translate can probably help you read. A simplified version. There is a unit for offset commercial printing called lpi. This is ...
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  • 20.7k
5 votes

How to edit an image without changing its dpi?

Purely digital images don't "have" dpi. They are just an array of pixels (dots). DPI1 - dots per inch - specify a way to translate the mathematical abstraction of pixels to a physical size. ...
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  • 1,199
4 votes

Is there a way to change camera settings (Nikon D40x) to a higher dpi?

You got it the wrong way round; the dpi setting stored in the file is nowadays just a historic and mostly useless number, and you could simply change it with a tool, but there is not even any need for ...
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  • 1,985
4 votes
Accepted

What is meant by pixels and DPI for photo submissions?

What it means is that whoever wrote the rules probably doesn't have a clue how JPEGs are rendered using most current image viewing applications. DPI (dots per inch) is a term that, when used properly, ...
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  • 167k
4 votes

What is meant by pixels and DPI for photo submissions?

Assuming the photo is square (from the 36" x 36" max) It sounds like the largest photo they want is a 1200 x 1200 pixel image. You will need to compress your photo down to under 1200 x 1200 pixels ...
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4 votes

How to scale up an image for print. How large can i go?

Do the math. If you really need 300 DPI, then at most your picture can be (2500 pixels)/(300 pixels/inch) = 8.3 inches wide. If you want bigger than that you either can't, or you have to relax your ...
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3 votes
Accepted

How to submit a picture with 12mp and 300dpi to a contest?

Dpi is dpi and megapixels are megapixels. Apples and oranges. These are two different values that can be chosen independently. 12mp means that the total number of pixels should be 12 megapixels. ...
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  • 8,334
3 votes

Is there a way to change camera settings (Nikon D40x) to a higher dpi?

I can print a 4x6, then scan it and save at the higher resolution. Why would you do that! Where is the magic process that creates new detail there? You are only losing information! You are cheating ...
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  • 20.7k
3 votes

How to submit a picture with 12mp and 300dpi to a contest?

Your camera is 18Mpx. 12 is a smaller one. For an important shoot get used to shoot in RAW so you have flexibility to edit the image, but it is not important for the requirements of this contest. ...
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  • 20.7k
3 votes

Is there a general formula for image size vs. print size?

The big problem you have here is that your aspect ratio is wrong. A0 (or any other A size paper) has an aspect ratio of 1:sqrt(2) or 1:1.414 or so. Your image has an aspect ratio of 2048/1152 = 1.777. ...
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  • 19.7k
3 votes

Do cameras assume a particular size of print when reporting DPI?

Nope. The number is purely fictitious. The vast majority of cameras always put the same number. You can even check it out by changing the size of image output and you will see that the DPI stays ...
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  • 101k
3 votes

Calculating cost of Inks

Your first problem. There are many ways to convert an RGB file to CMYK. This depends on the color profile and that gives you different CMYK values for the same RGB one. Some give let's say a 300% TAC ...
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  • 20.7k
3 votes

Calculating cost of Inks

Once upon a time I was tasked to provide data to estimated material costs for photofinishing shops using high speed inkjet print engines. Analyzing ink consumption for tens of thousands of prints of ...
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3 votes

Does bumping DPI improve the print quality?

You're doing something more than simply changing the dpi setting if the file size is increasing significantly. Just changing the dpi setting in the image's metadata should not affect file size if the ...
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  • 167k
3 votes

Does bumping DPI improve the print quality?

Short answer No. More elaborate answer No. The statement about 300 DPI being "best" most likely comes from the fact that this is incidentially their printer's native resolution. If you scan ...
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  • 131
3 votes
Accepted

Scanning film negatives - Resolution, DPI and file size

dpi is about the inches... pixels per inch. 4500x3000 pixels at 3200 dpi is 1.4 x 0.94 inches, on the film. 4500x3000 pixels at 360 dpi is 12.5 x 8.33 inches, on the print paper. The spacing and ...
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  • 12.5k
3 votes

Are 72 dpi and 300 dpi images with the same resolution the same quality?

The reason you, and everybody, have trouble figuring this out is because there is no such thing as the dpi of digital images. Images only have pixel dimensions and image quality. You can only get the ...
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  • 629
3 votes

Paper recommendation for 1200 dpi print?

Typically, finely printed details are created with photo lithography. The source image is created at a larger scale than the final image to reduce the effects of mechanical tolerances. The larger ...
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2 votes

How many printed dots are needed to represent a pixel with an inkjet printer?

The variability of size and positioning precision of one "spit", as it's called, varies with printing technology and model lines over time. As I recall, one particular printer I studied (and some ...
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  • 4,272
2 votes

Trying to print A1 size paper, but confused over dpi/resolution settings

This is a dialogue that creates a new image and the DPI shown here is only for reference if you want to set the resolution of the document according to how large you want to print it. However, since ...
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  • 2,024
2 votes

How to submit a picture with 12mp and 300dpi to a contest?

You said "stay 12mp" so I assume the image is 12 mp now. So in Lightroom, in the Adobe Camera Raw editor view, there is a line of text immediately below the preview picture. That line (by default) ...
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  • 12.5k
2 votes
Accepted

Is 4288 X 2848 pixels an unfriendly ratio for quality printing and framing or am I missing something?

The native aspect-ratio of nearly every DSLR is the same. This is actually 3:2 and is available in sizes from 4" x 6" to 24" x 36" quite commonly. There is usually a few extra pixels in one dimension ...
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  • 101k

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