Questions tagged [file-format]

A file format is a particular way that information is encoded for storage in a computer file.

Filter by
Sorted by
Tagged with
3
votes
4answers
4k views

Changing JPEG to RAW to use on Lightroom?

Am I able to covert JPEG into RAW so I can treat the images on Lightroom? Reason why is that for years I am travelling and taking tons of pics but my Nikon was programmed only to save in JPEG format.. ...
8
votes
1answer
2k views

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

I am participating in a photography competition. There is something that I want to ask you about: We may require the originals of the awarded photographs to be submitted by the relevant ...
2
votes
2answers
120 views

Fast, lossy compressed, 10 bit image format (Or 12 bit or 16 bit)

I'm looking for an image format to keep my photo archive. Currently I'm keeping compressed DNG + 80% quality JPG. JPG is useful because you can easily convert and manage, is small and is fast to read/...
1
vote
7answers
349 views

Can RAW image files deteriorate over time?

I was at a photographer some time ago, shot some photos of my son and came back to view and select a range of images, some of which I wanted to print, and some of which I wanted and to receive by file ...
3
votes
1answer
114 views

File formats for stereoscopic 3D images

Years ago I got into cross-eyed 3D photos and I've made a good few of them. Not many people are willing to spend the few days and eye strain to learn the viewing method, though. With Google Cardboard ...
0
votes
3answers
105 views

How can I detect if two files are actually the same image? [duplicate]

Let's assume a JPG file (or any other image/video file format), that I duplicate the file, and I modify the tags on the copy. Is there a way to verify that the image inside both JPG files is actually ...
86
votes
4answers
12k views

What does an unprocessed RAW file look like?

I know people use fancy software like Lightroom or Darktable to post-process their RAW files. But what if I don't? What does the file look like, just, y'know, RAW?
0
votes
3answers
399 views

Is there a way to get smaller TIFF files?

I'm working with canon CR2 RAW files. My images usually have 30MB when I import into Lightroom, but when I bring into Photoshop for an adjustment and get back to Lightroom the TIFF file generated is ...
1
vote
2answers
142 views

How to make my panorama interactive?

This panorama is interactive, this isn't. How do I make my panorama interactive? I guess it's either an EXIF flag or a specific format. Ideally I'm looking for something free which works on Linux. ...
0
votes
1answer
61 views

Seeing the difference/losing information when comparing different formats

You can hear the resulting loss of sound information when you invert an mp3 in an audio tool and mix and render it together with the wav format. You can now hear the difference between the mp3 and the ...
1
vote
0answers
90 views

DSLR suddenly switches from RAW to FINE

I've noticed that sometimes my Nikon D3400 suddenly "decides" to switch from RAW to FINE (most of the times it happens when I take the SD card out, but I don't really understand why). Is there ...
4
votes
2answers
272 views

Is the Preview file always the photo taken by the camera?

When I take a photo with a digital camera (I own many*), I can preview it with the ▶︎ button. However, sometimes, cameras will displays a Preview photo that seems of a different quality than the ...
3
votes
1answer
256 views

Should I resize photos before or after image optimization?

I am a software dev who appreciates stunning imagry in sites I build, but am also very conscious of page size. My workflow has me adjusting image sizes to the maximum resolution they will be displayed ...
60
votes
15answers
23k views

Aren't all digital images ultimately just pixel values between 0 - 255?

I have a few incredibly basic (stupid?) questions about images; specifically, image formats and pixel values. Forgive me, I'm not a photographer. I'm just someone that works with images, and to me, ...
7
votes
4answers
9k 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, ...
-1
votes
3answers
824 views

How to represent and print very large for example 100000 X 100000 pixel image?

1. How are very large (for eg. 100000 X 100000 pixel) images represented? JPEG's have a file size limit of 64k X 64k pixels. What is the standard format to save very large images? 2. How are very ...
2
votes
2answers
1k views

Does FITS file format contain color information?

I am trying my hand at astrophotography. I am using the software Siril on Linux to stack my images. This software uses the .fit file extension (for the FITS format). It seems to me like FITS is in ...
3
votes
3answers
193 views

How can I losslessly extract 2D image from a stereoscopic JPEG?

I have some JPEGs captured from a Nintendo 3DS via Miiverse and would like to optimise them for the web. The images are 2D but stored as a stereoscopic JPEG, so each file ends up containing the same ...
8
votes
3answers
11k views

How are 360° photos stored and processed?

While looking up 360° photos I found a lack of information about how the images actually work, I found some info suggesting that the images are stored as a regular jpeg but I was unable to find the ...
2
votes
0answers
81 views

Why three different file names from one download? [closed]

I downloaded 500+ pictures from my Canon (possibly using two 16GB SanDisk Ultra Plus memory cards). 300+ had a three digit nos. as a file name (JPEG); two pictures had the DSC prefix (JPEG); and 250+ ...
1
vote
1answer
187 views

Problems with HDR regarding bit depth and file type

When I merge my brackets with Lightroom it's always 8-bit and in HDR Efx Pro 2 it's also in 8- or 16-bit. When I use PS to merge brackets I can convert it to 32-bit but then I can't post-process it ...
9
votes
6answers
4k views

What makes RAW files difficult for manipulation?

The only available tool able to create a RAW file is, as far as I know, a camera, and there are no standard tools to manipulate it. I've heard that's why RAW files are used in different photography ...
1
vote
4answers
692 views

Why does an X megapixel sensor produce X MB of data (in image files)?

Suppose I have 1 mega pixel sensor, it means I have 1*10^6 (1 mega) pixels. If and only if each pixel represent the density of his color in 8 bit depth, so 8 bit = 1 byte, means each pixel is 1 byte ...
5
votes
4answers
2k views

Which file format is recommended for black and white photographs?

In which file format should I shoot black and white photographs? Everything I found on the internet was about black and white image scans and general image file formats.
7
votes
7answers
777 views

Is a JPG guaranteed to produce the same pixels?

I know there are plenty of benefits to shooting in RAW, but at the moment it seems that JPG works just fine for me. The file sizes are way smaller, and darktable seems to work just fine with them (...
0
votes
2answers
195 views

Is there a file format that supports adjustment layers, that I can edit in Lightroom and doesn't double the file size?

I'm working with some big .psd scan files that have just 1-2 adjustment layers. These files are going to be further edited and managed in Lightroom. To both keep the adjustments and but have ...
6
votes
2answers
2k 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?
1
vote
1answer
5k views

What's the difference between S LOG and V LOG [closed]

I know what logarithms are, what shooting RAW is, and how storing images logarithmically increases details in shadows. But what's the difference between "S log" and "V log"? I've also seen mention ...
0
votes
2answers
147 views

How do I create a bracketed file for Aurora HDR software?

I have a Samsung J7 phone and the Aurora HDR software and tried to create an HDR image file with the phone. The phone has an HDR mode in the camera app. The software requires a bracketed file to do ...
0
votes
3answers
203 views

How can I preview photos from camera on laptop?

When I import photos to my laptop, windows 7 they are saved in a folder by month. When then clicking on the folder it opens up the individual photos but they all show a 'flower'symbol and I have no ...
6
votes
1answer
534 views

How can I capture RAW files with an iPhone?

With iOS 10 coming to iPhones starting today, I am wondering how exactly RAW capture works with the new OS. Are RAW files available only in third party apps that add that capability, or does the built ...
2
votes
2answers
2k views

What kind of files can I get out of a Ricoh Theta S?

When shooting full sphere panoramic photos with the Ricoh Theta S, what kind of files can I get out of it? Is it possible to get the two files before stitching? Or do I always get the final product? ...
-2
votes
2answers
949 views

Which is the best strategy to downsize an image file?

Images created by a camera or by a scanner can get a very large file size. this huge size has downsides: Can't send over mail. Can't publish on a web site Any action abuses the computer CPU and ...
1
vote
1answer
4k views

Corrupted JPG has undesired color bars overlay [duplicate]

I have transferred photos from my camera SD card to my computer (using a card/ram reader) and deleted the original photos. Now I have just realized there are color bars overlaid in photos. Here is an ...
0
votes
4answers
477 views

What is a “losee file format”?

I am wondering what a "losee file format is". I came across the term in my photography class book The exact question in the book is: Which of these file formats are considered losee? Does that ...
3
votes
1answer
2k views

How can I view .ctg files taken from my Canon camera?

How can I see the images taken from my Canon camera. All files are converted into CTG, and I could not open either in the camera nor on the PC.
0
votes
1answer
91 views

How can I access a file with a .jpg&h=906 ending? [closed]

I've recently come across an image with the filetype, ".jpg&h=906" and for some reason I cannot view the image on my desktop computer once downloaded. Does anyone know anything about this filetype?...
2
votes
5answers
32k views

The CR2 photos I take on my Canon will not save as an image file. How can I fix this?

I copy and pasted my photos from my Canon Rebel SL1 straight to My Pictures on my computer. They appear to be image files, but the file type is "CR2". When I try to post them on Facebook, image ...
0
votes
1answer
122 views

DNG Compatibility in Adobe Lightroom

In Adobe Lightroom CC 2015.3, Preferences -> File Handling -> Compatibility, I have "Camera Raw 7.1 and later" selected. After importing RAW files, for example a few Sony's ARW RAW files, via Import ->...
1
vote
2answers
589 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 ...
2
votes
3answers
340 views

Lossy but essential: is there a modern file format useful for modern camera files?

I remember the early digital cameras that had anything resembling useful quality (megapixel) stored JPEG files that were noticeably lossy. As memory cards became more capable, this was addressed and ...
7
votes
3answers
8k views

Can I do “back conversion” of a B&W JPEG to color?

I have a black and white JPEG. It is in fact an RGB image, which means that the color is still there. And I know from past experience that when I shoot B&W with my Canon, the color image is still ...
2
votes
3answers
3k views

64GB CF Card exFat Format in D300?

I just bought a Sandisk 64GB CF card to use in a Nikon D300. Display says card is full. I reformatted the card in my PC, no luck. I formatted the card in my camera, same thing. Card appears to format ...
1
vote
4answers
2k views

Will a TIFF or JPEG be a better choice for detailed representation of an old painting?

I wish to purchase a high resolution photograph of an old painting to project and copy. The images are either in TIFF format, which is 148.8 mb, or JPEG, 24.3 mb. Would either of these give me the ...
0
votes
3answers
11k views

How can I prevent someone from zooming in to a photograph I send them? [closed]

I have a photograph named A.jpg. I have to send it to some other person and I dont want him to zoom it more than 30%. Is there any such option? I am ready to change my extension of the photograph also,...
13
votes
3answers
4k views

Is there a lossy compressed file format for 16-bit dynamic range images?

I'd like to aggressively compress some scientific 16-bit grayscale image files, but without reducing the dynamic range. Is such a thing possible? I understand that JPEG format uses lossy, and ...
1
vote
3answers
916 views

Should I save scanned images of 35mm slides from a Nikon scanner in JPEG or Tiff?

I am scanning 35mm color slides, some 50 years old, with a Nikon scanner. Should I save the scanned image in jpeg or tiff format for saving on archival CDs?
2
votes
1answer
916 views

What is the practical purpose of “use raw as original” in Photos for OS X?

Within OS X Photos app, when I shoot jpeg/raw and upload to Photos, I get an image representing both files. By default I am looking at the jpeg. Or I can choose a command "Use Raw as Original". I ...
6
votes
3answers
1k views

Which has a faster write time: RAW or JPEG?

My question is about the write times of the RAW and JPEG file formats. A RAW file is larger than a JPEG and needs more time to write to the memory but it does not need to spend time on data ...
2
votes
2answers
571 views

Why are the extensions of files imported to my Mac in upper case?

I have an Olympus Stylus 1 camera. When importing photos taken with that camera onto my iMac via finder (not the Photos or iPhoto app) the extension of the photos are always in upper case, for example ...