Linked Questions

0
votes
3answers
125 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 ...
300
votes
16answers
57k 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 ...
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?
53
votes
6answers
21k 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
15k 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
12k 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
7k 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" ...
9
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
1k 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 ...
7
votes
4answers
549 views

Can we improve phone cameras using separate sensors for each of RGB?

So I was reading all about the multi camera system on the new Huawei P20 Pro which really got me thinking about how we can use multiple cameras to improve image quality, especially in such a compact ...
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 ...
8
votes
3answers
924 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 ...
4
votes
5answers
3k views

What is difference between 8bit RGB and 16bit RGB?

Most of time when I open any images to Photoshop, it shows 8bit RGB format, but I have also seen 16bit RGB. As a trial, I copied one image and pasted it into a 16bit RGB blank image, but I didn't get ...
1
vote
3answers
1k views

How sharp are RAW photos before processing?

Are RAW images by nature slightly blurry prior to processing? If I open them up in Lightroom and zoom into the photo, my photos are not tack sharp but a bit blurry. Once I process, it comes out ...
10
votes
1answer
517 views

Are paler raw images normal for a newer sensor with higher dynamic range?

I started photography with the Canon EOS M (the very first in the M series). Recently I bought the Canon EOS M6 and of course now I try to compare the two image quality wise. To my surprise, although ...
2
votes
5answers
994 views

How do I find the right white balance value to set in my camera?

As I understand White Balancing means - making a particular color look as it should have been irrespective of what color the Ambient Light is. i.e A white paper must look white not blueish grey(cool) ...
4
votes
3answers
2k views

Can all colors be described with RGB?

If one could pick ideal sensitivities for the RGB filters of a camera sensor, would it be possible to capture any color as humans see it?
0
votes
2answers
590 views

RAW in ACR vs JPG in ACR

Photoshop has now given the facility to open and edit JPEGs and other non-RAW file formats using Adobe Camera Raw. One doesn't have to shoot RAWs to do some heavy edits. So is there still any benefit ...
1
vote
4answers
442 views

Do full frame sensors have a higher exposure? [duplicate]

I was reading a piece on the comparison of APS-C to full frame sensors. In this article, it mentioned that full frame sensors can have larger individual "photo sites", and can therefore capture more ...
3
votes
3answers
907 views

Does black and white film have any advantage over black and white effects in digital?

I understand that digital sensors use an RGGB layout for pixels, where 50% of the pixels are green, 25% blue, and 25% red. This means that any particular pixel is sensitive to only one particular ...
1
vote
2answers
1k views

How many autofocus points in iPhone 6 camera

I have seen that high-end SLR camera tout the number of autofocus points they have. How many AF points does the iPhone 6 camera have? I have not seen any discussion on it except for "focus pixels".
1
vote
2answers
2k views

How to set up correct color profile in Windows?

My question is how to set up color management at all levels? There are five levels that I know of. Correct me if anything of this is wrong. The monitor LEDs. It should be calibrated at the factory ...
3
votes
2answers
265 views

Do colored LED lights produce less illuminance than traditional spotlights?

I'm shooting theater plays and starting to shoot some alternative fashion shows. Many colored lights these days are LEDs, not white + gel as they used to be. Let's simplify things a bit and consider ...
2
votes
5answers
402 views

Why and how capturing RAW image instead of JPEG helps with editing [duplicate]

Often I heard photographers say that RAW is used for editing photos. I have used Adobe Photoshop Lightroom before and I don't see how capturing RAW helps. Can anyone explain how capturing RAW helps ...
1
vote
3answers
181 views

How to replicate the higlight protection of an iPhone using a DSLR?

When taking photos with my iPhone, the phone's camera does a great job of protecting the highlights from blowing out. When using my Canon 5D mark ii, on the other hand, it seems to map a much narrower ...
1
vote
3answers
1k views

Why does NEF file get washed out/highlights while my JPG look normal? [duplicate]

TLDR. is just the title. I know nothing about photography, sorry. My dad has a d90 he never uses, so I use it to take photos when I need them for something. Anyways, I put it on raw mode. when I ...
2
votes
2answers
184 views

Approximating raw image data from app-less iPhone6 by reverse processing using meta data?

note: To preserve @MichaelClark's substantial answer below, I've volunteered to leave this question here and allow it to be closed, instead of just deleting it (see discussion below the answer). That ...
3
votes
3answers
169 views

Is the color reproduction of different cameras inherent to the sensor or due to software?

Often, reviewers and camera users talk about the 'Color Science' of a particular brand of digital camera, e.g. it is said that Sony digital cameras do not have good skin tones. Is this 'Color Science' ...
2
votes
2answers
151 views

Why RAW and JPEG look the same?

I recently bought a canon m100. I shoot both raw + jpeg but they look exactly the same. The only difference is the file size. Aren't raw photos supposed to have less contrast etc? I've tried to view ...
0
votes
1answer
358 views

Opening NEF files on windows initially open file but then change contrast

I have a strange issue with Windows 10 When I open .nef files they load fine. However after a second or two the contrast changes noticeably. I tried Windows 10 Photos and Picasa Image Viewer. What ...
-1
votes
4answers
290 views

Set ISO sensitivity per channel?

To control color balance in digital camera exposures it would potentially be useful to be able to change the sensitivity of the sensor on a per channel basis, or alternatively to be able to apply an "...
2
votes
3answers
465 views

What is white balance in a camera? When and where should I use WB? [duplicate]

I like to do different experiments in my photography. Recently I was experimenting with white balance. Can anyone help me? What is actually white balance and when it is used? Do you have an example?
2
votes
3answers
246 views

How often do I need to recalibrate using a ColorChecker?

So I'm picking up a ColorChecker. Partly because I'd like to have more accurate colors and (let's be honest) partly out of curiosity and boredom. My question is: I understand that colors should ...
1
vote
3answers
372 views

Assuming no editing, what's the difference between in-camera jpegs and lightroom jpegs? [duplicate]

I have a Canon 6D. I usually shoot RAW + JPEG. I shoot RAW so I have the option to edit, but I don't actually edit most of my pictures. I've noticed that if I just import into Lightroom and export ...
2
votes
2answers
222 views

How close are we to the theoretic limits of sensor low-light performance?

Consider a low-light, high-ISO, short-exposure shot. We all know the image will be noisy. I understand that the image noise is dominated by the photon counting noise (shot noise) that is caused by ...
1
vote
2answers
131 views

Shooting in RAW Format [closed]

I have a Pentax K100D Super and am just learning to shoot in RAW Format so far all my photos have come out very white lacking in colour particularly of water and surf
1
vote
2answers
211 views

RAW (.dng) on my Phone (OnePlus 5) vs on Picasa 3 (Noisy)

I recently took a long exposure shot of the sky at night on my OnePlus 5. The RAW image when viewed on phone turned out to be great, pitch black sky and white-red-blue stars! Pretty excited, I decided ...
0
votes
1answer
547 views

Reason why MFT are less bright than FF cameras? [duplicate]

My understanding is that low-light performance is a function of the amount of light received on the sensor per unit area (correct if wrong). If this is the case, wouldn't an MFT system have the same ...
3
votes
3answers
152 views

Do different smartphone apps create different raw pictures?

Androids camera-2 API supports taking photos in raw format (dng for my Nexus 5) with an appropriate camera app. Since there are different apps I could use, I'm wondering if the raw picture data ...
2
votes
2answers
145 views

Is tone mapping automatically applied to RAW images?

At first I thought tone mapping was a thing for HDR images only used to "display" the dynamic range which our monitors can't show. Turns out that RAW images tend to have a high dynamic range too. So ...
2
votes
4answers
232 views

Pixels and photodiodes

A photodiode is the smallest element of a digital sensor, while a pixel is the smallest piece of information in a digital image. I wonder if the two terms can be used interchangeably or there are some ...
0
votes
1answer
386 views

Reading raw12 file into 2-d array for further processing it into png format

I have a raw-12 image file . I want to read this using c++ into 2-d array . but i don't understand the the basic picture of raw-12 file that how pixels are really arranged in it. can anyone help ?
-1
votes
3answers
170 views

Mathematical definition of EV on a RAW photo? [duplicate]

I'm trying to write a program that takes in a matrix full of 12-bit RAW sensor values (that range from [512-4096]) (512 is the BAYER sensor black level--> i.e. what pure black is defined as) and ...
0
votes
2answers
263 views

How do I white balance for B&W with Lee filters?

I am a B&W newbie....I'm using an X-T2 and the Lee 100mm polyester filter B&W set; I'm shooting in RAW. Let's assume I am using the green filter. Shooting: Do I do a custom WB before the ...
1
vote
4answers
137 views

Why does the green gain affect the blue and red values on a CMOS sensor with individual gain control?

I'm taking pictures of little surfaces (5 x 5 Millimeters) in an experimental setup with an ids camera that contains a cmos sensor. Afterwards the pictures are split into the 3 color channels (red, ...
0
votes
1answer
89 views

What white balance should be selected if the photo is supposed to completely surround the viewer?

Suppose you shoot a cubemap to be viewed inside a room with walls, ceiling and floor being screens showing the scene you shot. The monitors should obviously show the images as closely to what would be ...