Lots of "Hot pixels " in RAW images.

[theelite1x87]

My G4 had this problem really bad. When I got my V10 I never saw any. Just opened some RAW images I took with my S8 in a photo editor (on pc), and all of the RAW (DNG) images have lots of hotpixels. They are the speckles of blue red and white pixels on what should be a black sky. The jpeg images don't have this. What do you guys

think?

Sorry for the odd image, but I just took pix of my monitor. I have image zoomed in on my pc

 

[frellingfrakker]

All of my raw shots are hot but I'm not posting them here...

 

[Kalvin Kerns]

All of my raw shots are hot but I'm not posting them here...

Lol

 

[jeffmd]

This may be a "thing" where all image sensors have hot spots, and each cmos chip has a corresponding factory made image mask that in the first part of post it adjust out the hot spots? unfortunately I haven't enough experience with these to determine how quality control is these days.

 

[theelite1x87]

I was happy when my V10 never seemed to get them. My G4 had them in every shot. I checked other RAW images. I have not taken too many yet, but ones I took about 30mins prior to that one in low light (dusk, but not night) don't seem to have any. I read that hot pixels tend to come up after extended exposures or when sensor gets warm. That night shot was not particularly long. And my V10 did 30sec exposures with none visable. I'm looking into software solutions to get rid of them. I know lightroom will but that program is a little spendy for my budget.

 

[theelite1x87]

Re: Lots of "Hot pixels " in RAW images.

I am actually wondering if some forums members could do me a big favor. I'm debating returning the phone over this issue as shooting RAW images is important to me. But the clock is ticking and since phone is otherwise perfect, im a little hesitant. Anyway. I noticed the spots show up only when taking RAW images (via Pro mode) in dark places. I did a quick and dirty test and snapped an image under my desk and saw the same hot pixels. They show up even when viewed in gallery on the phone. Could some forum members please take some RAW images of dark areas (non lit bedroom, closet etc). Just to see if they get hot pixels as well (maybe post screenshot of them zoomed in from gallery?) If this is just how the sensors are, then I'd rather not go threw the hell of swapping phones out. And since the S8 plus is likely in tight supply right now, it wont be a fast process either. Thanks to anyone who can!

EDIT: Ok. I downloaded Photoshop Elements 15 trial. I currently use Paint shop Pro X9. I also tried my trial of PhotoDirector 8. Now... The RAW image looks the same when opened in PSP X9 or PhotoDirector8. Same hot pixels etc. I tried After Shot Pro 3 but that program won't even open up DNG files, so it was a big fail. However, Photoshop Elements must process RAW photos much better than either of the other programs I use because the EXACT same RAW image that looked like a multi colored hot pixel mess looked great in Elements 15. No hot pixels to be found, and image was rendered far better overall. Less noise, more detail. I guess raw images are much more dependent on what program processes them than I previously thought. I won't be returning anything. The images look great when I open them in Elements 15. Guess I'll just have to buy new photo editing software

 

[steveh552]

Re: Lots of "Hot pixels " in RAW images.

I think it is just a limitation of the camera sensor. Both open in Elements 13 Here is one in pure dark and one with just my computer monitor lighting the wall.

For comparison here are RAWs off my iPhone 7 plus taken with the same exact lighting, one pitch black and one with monitor backlighting, these were shot with Procamera app due to the fact iPhone does not allow you to do RAW in the native app.

 

[theelite1x87]

I did more research on RAW files and how the RAW image looks when it's processed depends VERY much on program and algorithms used. It's not like a jpeg where it'll look identical regardless of what's used to open it. I'm guessing the programs I used with my v10 processed them properly, where the RAW images from my s8 are not. I guess hot pixels are fairly normal in most camera's. The thing is, they are taken out automatically by the camera when saved as jpegs, and good RAW editor's do the same thing so you'll normally never see them. In case of my S8, Photoshop elements seems to process them properly and the RAW images look fantastic. Lightroom I'm sure would be great as well but Elements is far cheaper.

 

[steveh552]

Interesting read. I was playing with mine today and shot from a bright room into a dark hall and on the RAW zoomed in it surely had a few hot pixels, I never noticed those on any other device.

 

[theelite1x87]

My V10 didn't have them. But my G4 did. I can also see then on RAW images from my Panasonic FZ35 (superzoom camera) but they aren't as numerous. And the RAW software that came with that camera also seems to automatically eliminate them.