P20 Pro camera - Problems in Jpeg compression at 40mp - Huawei P20 Pro Questions & Answers

Personally, I just realized that even taking photos at 40mp with the stock camera a high compression ratio is applied without any criteria. I took several identical photos and realized that some have a size of 15mb and others were with 3mb. Photos identical with the same settings. I tested other applications and encountered the same problem. Lightroom CC and SnapCamera. Here comes the surprise! With cameringo+ I got files with a bigger size at 40mp. That it would be the right thing to do to others as well. Please take a test and comment.

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How to Save 3 pictures per shoot, RAW, Jpg and Monochrome? In the same shoot.

Hello,
would it be possible to make the phone to save 3 types of pictures per shoot instead of 2? I meant that I would like the phone saving RAW, jpg and Monochrome samples of every shoot instead of saving only Raw and color jpg.
Is there anyway of modding camera app to get this feature?
Thank you.
I don't even know how to take 2 pictures ?
How you do that?
going from raw to monochrome in post is not good enough ?
EDIT: i did not think this trough..... of course its not good enough .... otherwise you would no have asked.... silly me
Yes. In raw mode the phone saves 2 pictures.
I need it to save 3 or raw color and monochrome at least. I use them to stack a picture in photoshop and the result is amazing IMO, but I must take two shoots, hence the pictures are different, specially in long exposure.
I need a way to take raw color and monochrome in one single shoot.
I am thinking about the same problem: raw+Monochrome should do magic.
But when switching from raw to MCh phone changes the angle/positioning so its imposible to take 2 identical photos...
That's not much of a problem. A bit of tweaking with photoshop and done.
But I wonder why both pictures are so different in angle and size. A matter of lens?
Two crops of 100% size pictures. First one is the Jpg that saves the phone. The second one is a merge between Raw and monochrome pictures in photoshop, not quite elaborated:

Heads up - Dont use the default Huawei Photo Editor to crop

I tried cropping a 20mp 4:3 ratio image to 16:9 ratio using the built in huawei gallery app - It SHRUNK the whole photo to 3.6megapixel completely wrecking it
Any other image editor will correctly crop to 16:9 and you end up with a (correctly cropped) 14.7megapixel photo.
I contacted Huawei live support - they repeated it there end while i waited and apologised for the problem as it does it for them as well. Should be fixed in a later update I guess but for now....DONT use the huawei app for cropping at all. Im new to these forums and tried to attach a attachment but if it didnt work - you can see the result here I passed onto huawei https://ibb.co/cxAqQy
dan mc said:
I tried cropping a 20mp 4:3 ratio image to 16:9 ratio using the built in huawei gallery app - It SHRUNK the whole photo to 3.6megapixel completely wrecking it
Any other image editor will correctly crop to 16:9 and you end up with a (correctly cropped) 14.7megapixel photo.
I contacted Huawei live support - they repeated it there end while i waited and apologised for the problem as it does it for them as well. Should be fixed in a later update I guess but for now....DONT use the huawei app for cropping at all. Im new to these forums and tried to attach a attachment but if it didnt work - you can see the result here I passed onto huawei https://ibb.co/cxAqQy
Click to expand...
Click to collapse
I just tried it on my USA branded Mate 10 Pro and it shaved off some of the size (due to the crop) but other than that it all worked fine.
Sent from my BLA-A09 using Tapatalk
dan mc said:
I tried cropping a 20mp 4:3 ratio image to 16:9 ratio using the built in huawei gallery app - It SHRUNK the whole photo to 3.6megapixel completely wrecking it
Any other image editor will correctly crop to 16:9 and you end up with a (correctly cropped) 14.7megapixel photo.
I contacted Huawei live support - they repeated it there end while i waited and apologised for the problem as it does it for them as well. Should be fixed in a later update I guess but for now....DONT use the huawei app for cropping at all. Im new to these forums and tried to attach a attachment but if it didnt work - you can see the result here I passed onto huawei https://ibb.co/cxAqQy
Click to expand...
Click to collapse
Same here. 3840x5120 4:3 becomes 1920x1080 16:9
Thanks for the heads up!
Skickat från min BLA-L29 via Tapatalk
Try the 20mp setting (Ive not confirmed its a issue with 12mp on mine yet but will give it a try later on today) I should of provided my phone details sorry - Im in australia "Mate 10" (not pro) ALP-L29 8.0.0.132 (c636) Was confirmed as a bug by a huawei live support (they asked me to wait while they reproduced the issue themselves)
Just as a update - I ran the same test on the phones 12mp setting - The 16:9 crop using Huawei editor crops *correctly* for 12mp photos (just not 20mp photos) *edit - my tests were both done in landscape mode dunno if that makes a difference or not, but sounds like 20mp vertical/portrait photos also have the issue from another user*
I have a p20 lite and I have the same problem with 16mp photos.
The standard gallery app resizes every edited 16mp photo to a smaller resolution size on save (or when opening the editor, don't know).
Is this also the case with you guys or only when cropping your large size images?
It does this for every type of edit or tweak I've tried so far.
This is not a problem on the standard editor on the p8 (but maybe that is because the max 13 mp on that camera was 'small enough' for the editor).
My old phone HTC one mini 2 standard editor did also resize every photo (this was not updated in the years of use) . And since (at least with me) it seems to be a problem with every type of edit,
I'm not sure whether this is a mistake or deliberate...?
I'll test an edit on a 16 mp image or larger on the p8 later. If it doesn't resize the photos there:
Maybe there is a way to use the old p8 gallery app on newer models?
I even prefer an aspect of that editor (numeral indicators with the sliders instead of none)
It's possible to disable the gallery app? I'd like to replace it by Google photos.
JEELK said:
I have a p20 lite and I have the same problem with 16mp photos.
The standard gallery app resizes every edited 16mp photo to a smaller resolution size on save (or when opening the editor, don't know).
Is this also the case with you guys or only when cropping your large size images?
It does this for every type of edit or tweak I've tried so far.
Click to expand...
Click to collapse
I tried a couple other photo edits using the stock editor (not cropping) and it shrunk my photos again (12mp photos were affected as well) Ive just outright abandoned the default editor as a complete buggy waste of time its pretty obvious the huawei programmers arnt very good at their job
Tiago A said:
It's possible to disable the gallery app? I'd like to replace it by Google photos.
Click to expand...
Click to collapse
yes, you can change the default photo app using the default apps setting
the crop seems fine to me though

Why does S10+ have such bad jpeg compression ?

I took a ton of pictures, and compared many with S7. S10 is always super clean and smooth, without any noise, every picture size ranges from 1.3mb to 5mb tops. While S7 retains some noise in the blue skys, and can be edited after, the S10 one has macro-blocking from the start, and when I try to edit them a little, all sorts of artifacts start to pop up, like banding, it looks like 256 colored gif sometimes. I feel like when S10 processes and saves jpegs, it applys something like noise reduction 70/100, jpeg quality 60/100, if compared to Lightroom settings.
Samsung compress jpegs too much, the average jpeg out of the phone is about 2-3 mb, while jpeg converted from raw using Lightroom mobile is 6mb!
There is a new custom rom with modded camera app to get 100% jpeg
I noticed that too. Is it possible to change compression ratio on stock rom?
Nop
Unless you install a third party camera app with jpeg compression control.
If you want to use stock camera then take your photos in raw, you can edit them calmly in any raw editor
Thanks for the answer! Can You, please, recommend any third party camera app? Good RAW editor for Android would be helpful information too.
martolk said:
Thanks for the answer! Can You, please, recommend any third party camera app? Good RAW editor for Android would be helpful information too.
Click to expand...
Click to collapse
Good RAW editor for Android : Snapseed.
You also got Adobe Lightroom, but it is not for free.

Image Quality Different Across Devices

I sent my phone in for a cracked back repair and got a loaner from a friend,. While taking pictures I immediately noticed how much sharper the telephoto lens on the loaner is.
Here are some examples - left photo is my original phone, right photo is the loaner:
Example 1
Example 2
Example 3
These are all taken with the stock camera app with identical settings. The only interesting thing I've found is that there seems to be more jpg compression as seen here - all settings are the same but the file size is smaller. Almost looks like OIS isn't working.
I don't see any discernable difference in quality when shooting with the pro camera app in RAW or RAW + JPG, and jpegs from the pro app have the same size as the normal camera app.
Any thoughts or suggestions?
Hey! I am sorry you are going through such an experience with your 1 II. Doesn't seem to be worthy of the price you've payed for the device, and i doubt it is a software issue.
I would suggest to copy your message here and send it in to Sony officials, but maybe instead of the loaner, mention that those are the pictures your phone took before you gave it in for the back repair and after. This might sound a little unethical, but at least you won't be ignored in terms of provide of service.

Question 108MP works only with ISO <= 100 (and even then not always)

I found out that 108 MP mode only works with ISO <=100 on the Redmi note 10 pro.
Attached are crops from 108MP with ISO 100, 108 and 125. It is clear that after SO 100 the quality drops significantly. I shot the photo in 12MP as well and upscaled the photo in the PC. The resulting picture corresponded to the 108 and 125 ISO.
It would be nice to shoot 108MP at least up to ISO 400 or 800.
Moreover it seems that sometimes the 108MP is fake even though the iso is below 100. I did not find the cause of that yet.
Finally, the 108MP photos often have a green cast. It would be nice if that could be fixed as well.
The ISO_100_cr photo has a lot higher quality than ISO_125_cr and s_1_400_cr photos.
The ISO_100_a and ISO_100_b are taken about 3 minutes appart using the same settings and the same lightning conditions. However one of them uses the fake 108MP. I have no explanation for that so far.
I reported the bug using the Xiaomi Services & feedback. So far I did not get a reply.
xseryd said:
I found out that 108 MP mode only works with ISO <=100 on the Redmi note 10 pro.
Attached are crops from 108MP with ISO 100, 108 and 125. It is clear that after SO 100 the quality drops significantly. I shot the photo in 12MP as well and upscaled the photo in the PC. The resulting picture corresponded to the 108 and 125 ISO.
It would be nice to shoot 108MP at least up to ISO 400 or 800.
Moreover it seems that sometimes the 108MP is fake even though the iso is below 100. I did not find the cause of that yet.
Finally, the 108MP photos often have a green cast. It would be nice if that could be fixed as well.
The ISO_100_cr photo has a lot higher quality than ISO_125_cr and s_1_400_cr photos.
The ISO_100_a and ISO_100_b are taken about 3 minutes appart using the same settings and the same lightning conditions. However one of them uses the fake 108MP. I have no explanation for that so far.
I reported the bug using the Xiaomi Services & feedback. So far I did not get a reply.
Click to expand...
Click to collapse
Use pro mode. Its there.
In all of the photos above I used the pro mode. Otherwise I would not be able to set ISO manually. However the issue is in both normal and pro mode.
The phone acts like using 108MP, but in some cases it indeed used 108MP, in other it just upscales the 12MP photo.
Try clearing system cache and cam data.
Try rolling cam back to factory load if it's been updated.
blackhawk said:
Try clearing system cache and cam data.
Try rolling cam back to factory load if it's been updated.
Click to expand...
Click to collapse
I do not think the cam itself got updated, just the system to 12.0.10 MIUI Global. I cleared all the caches and the issue persists. Using pro mode 108MP with fixed ISO 100 and 125 there is a huge drop in quality in the 125 ISO.
xseryd said:
I do not think the cam itself got updated, just the system to 12.0.10 MIUI Global. I cleared all the caches and the issue persists. Using pro mode 108MP with fixed ISO 100 and 125 there is a huge drop in quality in the 125 ISO.
Click to expand...
Click to collapse
What about using it in ISO 200?
The drop in image Q is very small or should be.
blackhawk said:
What about using it in ISO 200?
The drop in image Q is very small or should be.
Click to expand...
Click to collapse
The pictures look almost the same for ISO 50-100. Then there is a sharp drop in quality and than the pictures are almost the same for ISO 125-500. ISO 1000 is noticeably softer, but that is to be expected.
xseryd said:
The pictures look almost the same for ISO 50-100. Then there is a sharp drop in quality and than the pictures are almost the same for ISO 125-500. ISO 1000 is noticeably softer, but that is to be expected.
Click to expand...
Click to collapse
If it's native ISO is 100, don't drop below that unless the ambient light is too bright.
Use at it's native ISO # or higher whenever possible. Its native ISO is probably 100 but never assume...
blackhawk said:
If it's native ISO is 100, don't drop below that unless the ambient light is too bright.
Use at it's native ISO # or higher whenever possible. Its native ISO is probably 100 but never assume...
Click to expand...
Click to collapse
The automatic mode tries to use ISO 50 if there is enough light, so I guess that is the native ISO. However that does not solve the issue that for ISO > 100 the photo looks suspiciously similar to what I get when I shoot 12 MP and upscale the picture in the pc. And unfortunately even for <=100 it is not guaranteed to shoot the true 108 MP.
xseryd said:
The automatic mode tries to use ISO 50 if there is enough light, so I guess that is the native ISO. However that does not solve the issue that for ISO > 100 the photo looks suspiciously similar to what I get when I shoot 12 MP and upscale the picture in the pc. And unfortunately even for <=100 it is not guaranteed to shoot the true 108 MP.
Click to expand...
Click to collapse
You need to see what its native ISO is speced at to know.
Poor focus* and cam shake can be factors.
The 108 MP file size should be significantly larger than the 12 MP one.
*the wrong AF lock on point can trash images taken with a fast lense; the focal range is quit narrow at close range. Try some shots at 50 feet out.
All the photos mentioned above are at least 50 feet away and all have shutter time 1/300 or faster, so shake should not be an issue. The two last photos with the cherry tree even have ~1/1700s time and the issue is still visible.
Finally the picture size of the real 108MP files is 23-25MB, whereas the picture size of the faked ones is 14-18MB. Even there there seems to be something wrong.
xseryd said:
All the photos mentioned above are at least 50 feet away and all have shutter time 1/300 or faster, so shake should not be an issue. The two last photos with the cherry tree even have ~1/1700s time and the issue is still visible.
Finally the picture size of the real 108MP files is 23-25MB, whereas the picture size of the faked ones is 14-18MB. Even there there seems to be something wrong.
Click to expand...
Click to collapse
Size of the file varies by the content, sometimes drastically. It still could be an AF issue, try manual focus if you have that option.
Cam shake can happen at almost any shutter setting; brace the cam on something solid.
Because there is no weight to the phone compared to 2-7 pounds of a pro- cam means little inertia to over come and no good handholds... cam shake is more an issue.
You can get cam shake at 1/1000 @Sec with a pro cam if your technique is sloppy.
Review the cam settings carefully and double check them.
I don't know, you could be right. It seems like it be a poor business plan though. It may be an inadvertent flaw on that production run and/or the firmware for it.
blackhawk said:
Size of the file varies by the content, sometimes drastically. It still could be an AF issue, try manual focus if you have that option.
Cam shake can happen at almost any shutter setting; brace the cam on something solid.
Because there is no weight to the phone compared to 2-7 pounds of a pro- cam means little inertia to over come and no good handholds... cam shake is more an issue.
You can get cam shake at 1/1000 @Sec with a pro cam if your technique is sloppy.
Review the cam settings carefully and double check them.
I don't know, you could be right. It seems like it be a poor business plan though. It may be an inadvertent flaw on that production run and/or the firmware for it.
Click to expand...
Click to collapse
Just to be sure I did the test again using a tripod and a self timer. Still the same results. I could not use the manual focus mode, because the "infinity" seems to be only a few feet and my objects came out blurry.
The file difference was on the same scene, taken 10s apart. 24MB real 108MB, 14MB faked 108MB.
I have taken several photos in 108 in low light and the behavior of the Iso is correct.
It always maintains 108 and the Iso obtained go from 581 to 12800, I suppose it can go up a little more.
Logically, the higher the iso, the lower the quality and more with such small objectives.
I am very happy with the camera results and I come from a Pixel 2.
Well for one thing use solid objects that aren't able to be moved by the wind as subjects preferably with the light source in back of you rather than in back of the subject.
A wrought iron fence maybe.
24 mp is actually a lot. It's not just the pixel count but also the quality, grey depth, color accuracy that the individual pixel can capture.
blackhawk said:
Well for one thing use solid objects that aren't able to be moved by the wind as subjects preferably with the light source in back of you rather than in back of the subject.
A wrought iron fence maybe.
24 mp is actually a lot. It's not just the pixel count but also the quality, grey depth, color accuracy that the individual pixel can capture.
Click to expand...
Click to collapse
I selected branches because there the difference was the most obvious. There was no wind at all. I attach different part of the picture with a solid object.
jmfb55 said:
I have taken several photos in 108 in low light and the behavior of the Iso is correct.
It always maintains 108 and the Iso obtained go from 581 to 12800, I suppose it can go up a little more.
Logically, the higher the iso, the lower the quality and more with such small objectives.
I am very happy with the camera results and I come from a Pixel 2.
Click to expand...
Click to collapse
The camera reports all of the 108MP photos to be 108MP. However I believe that sometimes the picture was taken using 12MP and then just upscaled to 108MP using a software.
Good obsevation. I can't get my phone to make 20+mb pictures. I tried with your setting so: 108MP & iso 50 but no luck. Photos still come out between 14-17mb.
FakedAce said:
Good obsevation. I can't get my phone to make 20+mb pictures. I tried with your setting so: 108MP & iso 50 but no luck. Photos still come out between 14-17mb.
Click to expand...
Click to collapse
Sometimes I get the fake 108MP even with small ISO. I don't understand that. Or maybe your scene is not that complex and the file is smaller even though it is the real 108MP. Try using ISO 125 if you see a size and quality difference. You can also try shooting 12MP and upscaling the picture in PC to see if it is the same as what you shot in 108MP.
FakedAce said:
Good obsevation. I can't get my phone to make 20+mb pictures. I tried with your setting so: 108MP & iso 50 but no luck. Photos still come out between 14-17mb.
Click to expand...
Click to collapse
MP=megapixels
MB=megabytes
The correlation between file size and the number of megapixels is a not strictly a ratiometric one.
Without the manufacturer's white papers it's hard to know exactly how they are processing the image. Companies like Canon and Denon usually exceed their specifications, and often share detailed information beyond just the specs.
♤Does the cam allow you to shoot in RAW mode?
Try that if so. That should give a more revealing look at what's going on. RAW's have the least post processing and contain much more of the image data.

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