Linked Questions

0
votes
3answers
325 views

Megapixel number - how many sub pixels? [duplicate]

I read conflicting information about the megapixel - subpixel relationship when it comes to sensors in digital cameras. I read that megapixel is number of sub pixels and I also read megapixel is ...
0
votes
2answers
93 views

What exactly a Raw Image format encodes? [duplicate]

Ok, I have in mind that a picture P can be represented by a two dimensional matrix A where each element of A (aka every pixel) is a vector with four coordinates (Red,Green,Blue). What extra stuff is ...
304
votes
16answers
59k views

Good examples of RAW's advantages over JPEG?

I'm curious to see some real examples of where simply capturing the same photo in RAW (and being processed by someone who can do it justice) has significantly improved the photo at the end of the ...
88
votes
4answers
13k 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?
56
votes
8answers
23k views

Why are Red, Green, and Blue the primary colors of light?

Colors don't have to be a mixture of red, green, and blue because visible light can be any wavelengths in the 390nm-700nm range. Do primary colors really exist in the real world? Or did we select red, ...
47
votes
8answers
16k views

Why do we use RGB instead of wavelengths to represent colours?

As we know, the colour of a particular beam of light depends on its frequency (or wavelength). Also, isn't that the information which is first captured by digital cameras? Then, why do we use formats ...
38
votes
11answers
13k views

Are equipment reviews from websites like kenrockwell.com and bythom.com reliable?

I know that nothing helps more when buying a lens to test it out yourself, but getting more than one perspective is also helpful. In particular, I run into Kenrockwell.com a lot when trying to get ...
30
votes
10answers
9k views

Is there a black and white physical filter?

I am wondering if there is a physical filter that would allow a camera to make black and white pictures without using any software effect/filtering?
11
votes
5answers
8k views

Given an image how to identify whether it is RAW file or not

I'm a much like beginner level, so pardon me if this is a very basic silly question. Once I've a JPEG photograph image file, how can I find out whether it is a RAW file or not?
25
votes
4answers
14k views

What are the pros and cons of different Bayer demosaicing algorithms?

Bayer sensors use a pattern of red, green, and blue pixels, and merge those together into a final color image, with one pixel for every single color sensor. This could be done through a "naive" ...
10
votes
2answers
3k views

Why is it that when the green channel clips, it turns into blue?

I was taking photos of snow sculptures at night, and I noticed something strange on my Olympus O-MD E-M10 Mark II. This green lit sculpture when the green channel gets blown, turns blue ...
10
votes
5answers
2k views

What *exactly* is white balance?

When setting a white balance configuration, we adjust the temperature and green-magenta shift to a wavelength-intensity distribution of light that correlates most closely with the actual distribution ...
12
votes
2answers
1k views

Why does the histogram of an image depends on the software that opened it?

If I open a raw image in Photoshop and Paintshop pro their histograms and their look is different. However, if I open a Jpeg image in both Software, then their histogram and look is the same. What ...
9
votes
3answers
1k views

Why is my camera drawing labyrinths on my photos?

On the photos where the lens flare is present, my Nikon D7000 is drawing strange labyrinth-looking artifacts. Here's an example. The first image is a screenshot of a little part of the original photo ...
11
votes
3answers
2k views

Why can software correct white balance more accurately for RAW files than it can with JPEGs?

Why are post-processing JPEG white balance corrections not as accurate as white balance with Raw? My understanding is that when shooting jpeg the camera internally does the following steps: Convert ...

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