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Questions tagged [png]

The image file format. Questions about PNG files which do not relate to photography are off-topic here.

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How best to convert PNG to WebP

I have 900 large, proprietary, multi-coloured PNG images of different sizes scanned @ 600 PPI ranging from 10MB to 50MB. The scans (ie photos) are of prints. The average size is 35MB. They all have a ...
user13549917's user avatar
2 votes
4 answers
2k views

PNG files in photography workflow

I shoot Fujifilm and like the builtin film sims. Capture One, does a good job at reproducing them, but I find sometimes Fuji JPEGs better, particularly when some proprietary features (e.g Color Chrome ...
fmplayer's user avatar
1 vote
2 answers
112 views

Apple Preview vs. GIMP, Photoshop, Bridge etc. as PNG/TIFF to JPEG converter

I have a bunch of PNG and TIFF files—scans of old family photos and documents. I will keep them as archival masters, but for the purpose of online sharing I am creating JPEG's from these files. The ...
texnic's user avatar
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2 votes
4 answers
357 views

Is jpeg or png the standard for fine art photography?

Is jpeg the predominant file format for fine art digital photographs, or what advantages would png have quality-wise that jpeg doesn't for photography, given that it takes up much more hard drive ...
user610620's user avatar
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1 answer
319 views

Why does a 16 bit depth photograph export as 48 bit depth?

When exporting a PNG file of a photograph as 16 bit depth in Darktable, its Windows 10 file information ends up saying it has 48 bit depth! Similarly, the default 8 bit depth when exported comes out ...
user610620's user avatar
0 votes
1 answer
337 views

Why is JPEG the only compressed image choice in most digital cameras? [duplicate]

I've been viewing, editing, and storing digital images since before digital cameras were common -- I've used GIF, JPEG, TIFF, PNG, and a few other now-obsolete formats. GIF has been mainly relegated ...
Zeiss Ikon's user avatar
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2 votes
3 answers
491 views

What's the best format for pictures in order to have the most metadata?

Working with a smartphone, I've seen that JPEG shows a lot of information in the EXIF, where PNG not as much. However JPEG does some compression on the image which I'd like to avoid if not necessary ...
Samuel Dubuis's user avatar
0 votes
3 answers
323 views

How can I infer parameters such as distance from metadata?

Is it possible and how can I infer a parameter like the distance or the illumination from the chart, by looking at the metadata of the picture ? To give some context, I am working on a chart with ...
Samuel Dubuis's user avatar
1 vote
0 answers
234 views

Converting RAW NEF files to PNG/TIff - why is the converted PNG file 6x larger than the NEF file and TIFF 9x larger

I'm trying to convert NEF files to PNG or some other lossless format. Using Preview/Imagemagick, the 10MB NEF file is converted to 60-70MB png file or 95MB tiff file. Also tried converting to HEIC but ...
Avba's user avatar
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1 vote
4 answers
1k views

Should I convert my family pictures from JPEG to PNG?

I have a lot of family pictures saved in Google Drive as JPEGs - not JPEG 2000 - as they were initially acquired. I thought the problem with JPEGs was artifact at sharp edges, which is not too much ...
Antoni Parellada's user avatar
3 votes
3 answers
1k views

Exif tag for png files that will be recognized by google photos as date taken

I am trying to upload several png files (screenshots) to google photos. As PNG does not have DateTimeOriginal tag, I have used ...
Crops's user avatar
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1 vote
3 answers
1k views

Printing digital photos: why do (most it seems) print shops only handle PDF not raster formats like PNG?

I am in Sydney, Australia. My otherwise very helpful local print shop only handles PDF (with limitations as described in this forum posting). I have so far not found any print shops in Sydney that ...
Webel IT Australia - upvoter's user avatar
1 vote
1 answer
337 views

Saving a isolate prop image with shadow to png

I'm shooting singular objects in studio and would like to save them isolated with their shadow information and a transparent background as a png. Is there a tutorial someone could point me to to do ...
kphotog's user avatar
  • 13
2 votes
1 answer
108 views

regarding image transfer [closed]

I have this client that is having a very frustrating time. I took some pictures for their clothing line. I formatted them for social media posting and copied them to a USB. I gave her the USB and for ...
MAF's user avatar
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1 vote
2 answers
327 views

How to make Identical Images Of the Same Dimensions and Pixel Density Have Similar size [closed]

I have two images with the same dimensions. One is a facebook icon and the other is a plain white image. They are 32 bit, 128 pixels by 128 pixels, 96 pixels per inch and 3.39 cm but one is 1.87kb and ...
Lucem's user avatar
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9 votes
4 answers
27k views

Is it not ideal to save image as PNG for printing?

So the scenario: I want to order a print of one of my images. It is a special image and will be relatively large (a couple of metres) so I want it to be perfect as possible. I have the RAW file, ...
adam's user avatar
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7 votes
2 answers
8k views

Does converting image file formats affect quality?

Does converting image formats, such as from JPG to PNG, have any effect on image quality? I know converting from RAW to JPG has disadvantages, but what about other format conversions?
Mahesh Mankar's user avatar
8 votes
3 answers
28k views

How to add author and other properties to PNG files?

I am on Windows 7 and I can't find how to add the author or any other properties for a PNG file I created. The only thing I can modify is the shooting time which I don't need. Why is this so? You can ...
Cain Nuke's user avatar
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1 vote
2 answers
679 views

Why doesn't PNG show more detail than JPEG in a converted NASA image?

I have a really limited knowledge of photography, so, bearing that in mind, here is my problem. I downloaded an IMG file with a separate label file from NASA PDS because I wanted to visualise the ...
Gaetano's user avatar
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0 votes
1 answer
6k views

Remove all metadata from PNG, commandline [closed]

I'm trying to create really small PNG thumbnails from JPGs using GraphicsMagick. gm convert coolphoto.jpg -resize 16x16 -colors 6 coolphoto_16x16_6color.png ...
OneSolitaryNoob's user avatar
12 votes
2 answers
17k views

Is "Date Taken" Exif data possible on .PNG file, and is it possible to copy "Date Modified" to "Date Taken"?

I want to change the Exif data for some .PNG files so that they have the "Date Taken" tag. Is it possible to use that tag on .PNG files? Is it possible to copy the "Date Modified" date to the "Date ...
Dempa's user avatar
  • 223
0 votes
1 answer
745 views

What is this format? PNG unreadable by browser [closed]

I got an image, that is supposed to be PNG, but alot of applications can't read it (Windows itself can)... for example Paint Shop Pro says it is incorrect PNG, Chrome or Opera are not reading it ...
Flash Thunder's user avatar
2 votes
1 answer
448 views

If PNG is Lossless Why Does Difference Blending Mode Show a Difference

I often read that PNG is a lossless format so I decided to do a little experiment to try to prove it. In Photoshop I did Save for Web to PNG-24. Then, I did File->Place to open the PNG and import it ...
David Salahi-PhotoPerformance's user avatar
2 votes
2 answers
20k views

Does a .png file extension on an iPhone image mean that the photo was edited or altered in any way?

I've been told that a photo I took with an iPhone has a .png extension means that the photo has been altered or tampered with. I know I took the pic at that time. Why are some of my photos in the ....
Joe's user avatar
  • 21
7 votes
5 answers
29k views

Difference between PNG and RAW, other than compression?

I know that many professional cameras shoot in RAW. PNG has lossless compression which would allow cameras to save more shots than RAW. This leads me to wonder if there's anything special about RAW ...
Keavon's user avatar
  • 173
8 votes
5 answers
117k views

How to batch process images retaining them as PNG in Photoshop?

I need to optimize 700 images in PNG in a batch process, but Photoshop only gives me the option to optimize the images and export them to JPG, when I want to mantain the images on PNG. Is there a way ...
Moises Portillo Polio's user avatar
3 votes
2 answers
949 views

PSE10 Insert Invisible Watermark

I need to put an invisible watermark in some of my PSE10 edited PNG files, but since I am an amateur, I probably don't need an online subscription right now. How do I easily put an invisible ...
Shawn Eary's user avatar
24 votes
3 answers
48k views

Is TIFF really of higher quality than PNG-24?

I've been doing some research to try to figure out why more people do not store high-resolution image files as PNG-24. PNG has exactly-reversible, lossless compression, it is a net-friendly format so ...
cmal's user avatar
  • 343
62 votes
7 answers
23k views

Why don't most cameras support PNG format?

I prefer PNG format to JPG, because JPG uses lossy compression. When I capture a screen in my PC or scan a picture or document in my scanner, I always save them as PNG format. If a camera could ...
Benjamin's user avatar
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23 votes
7 answers
38k views

Ways to edit metadata of a PNG file?

How can I edit metadata of a PNG file? Is there some free software I can use?
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