issue when exporting => massive

[jean denis]

I have edited a photo in HDR (from a 5 pictures set raw canon R5) and did all the adjustment and correction but when I export the picture in jpeg or png I have a massive change of contrast and exposure. 

What I am doing wrong 

 

[Dan C]

Hi Jean,

Would it be possible to record a video of your process?

Lee

[Paul Mudditt]

Did you do the Tone Mapping step? You likely have too wide a range of colours in your HDR image for use in a jpg. 

[jean denis]

3 hours ago, LeeThorpe said:

Hi Jean,

Would it be possible to record a video of your process?

Lee

here is the video with explaination;

[jean denis]

1 hour ago, Paul Mudditt said:

Did you do the Tone Mapping step? You likely have too wide a range of colours in your HDR image for use in a jpg. 

I open the 5 file as "new HDR merge" then the computer do its thing (the tone maping HDR is ticked). Once it is done I land on the tone mapping persona. From that I adjust my contrasts, exposure, and so on. Then I click apply and I land on the phot persona. It is when I export the picture that the highlights become blown out. On the exported Jpeg and not on the photo on the photo persona.

 

 

[Paul Mudditt]

2 hours ago, jean denis said:

I open the 5 file as "new HDR merge" then the computer do its thing (the tone maping HDR is ticked). Once it is done I land on the tone mapping persona. From that I adjust my contrasts, exposure, and so on. Then I click apply and I land on the phot persona. It is when I export the picture that the highlights become blown out. On the exported Jpeg and not on the photo on the photo persona.

 

 

HDR seems to work fine on my M1 Mac Mini using macOS Ventura using the sample old window from the Affinity Photo text book. Would it be possible to upload your source images or have you tried this example. The images are located at https://affin.co/hdr.

PS: It is very easy to screen record on a Mac rather than using your phone, simply press SHIFT-COMMAND 5.

[jean denis]

On 4/6/2023 at 8:32 PM, Paul Mudditt said:

HDR seems to work fine on my M1 Mac Mini using macOS Ventura using the sample old window from the Affinity Photo text book. Would it be possible to upload your source images or have you tried this example. The images are located at https://affin.co/hdr.

PS: It is very easy to screen record on a Mac rather than using your phone, simply press SHIFT-COMMAND 5.

Hi here is my source image. 

IMG_4612.CR3 IMG_4613.CR3 IMG_4614.CR3 IMG_4615.CR3 IMG_4616.CR3

[jean denis]

On 4/6/2023 at 8:32 PM, Paul Mudditt said:

HDR seems to work fine on my M1 Mac Mini using macOS Ventura using the sample old window from the Affinity Photo text book. Would it be possible to upload your source images or have you tried this example. The images are located at https://affin.co/hdr.

PS: It is very easy to screen record on a Mac rather than using your phone, simply press SHIFT-COMMAND 5.

Here is my screen recording.  I am on a mac bookpro M1 max 2021 runing on ventura. 

The difference between you and me in the process is taht you start with jpeg and I start with raw image. I think the problem lays there as your pictures are already compress before you do the HDR process.

[Paul Mudditt]

I am getting similar results as you on both my Mac and my iPad for your images.

I did get some better results by processing each raw image first with your adjustments and saving to a lossless format such as TIFF before doing the HDR merge as we know JPEG is a lossy image format and also reducing the initial number of images. You could investigate furthur.

However I am seeing a loss of detail when exporting the final HDR image compared to what is on screen no matter which image format I use. I believe on export the images are being resampled which likely explains this. Why they always resample on export we will need Serif to point to the explanation. 

[lepr]

On 4/6/2023 at 5:02 PM, jean denis said:

here is the video with explaination;

 

Firstly, your results do not indicate a bug. Read on for an explanation.

Your Affinity document resulting from the HDR merging process is RGBA/32 which can have RGB intensities greater than the Standard Dynamic Range (SDR) limitation of JPEG.

In Tone Mapping Persona, when 'Clamp to SDR' is not enabled in the Main section at top of Tone Map panel, resulting RGB values are permitted to be more intense than SDR. Values which exceed SDR are clipped in an export to JPEG.

Your screen is displaying greater than SDR intensities in a RGBA/32 document because Enhanced Dynamic Range (EDR) is enabled (see 32-bit Preview panel) which displays values that are more intense than SDR on devices with the required capability. If you disable EDR, your display will have the same SDR limitation as JPEG and other non-HDR formats.

The 32-bit Preview panel can be enabled in the Window menu (or View>Studio menu in AP 1.x).

Also, there is an option in the Colours section of the app preferences for automatically enabling/disabling EDR when a RGBA/32 document is created or opened.

[jean denis]

HI thanks a lot for all the explanation : the bug was coming from me 😂 and not the app. I have disabled the EDR and I am ticking the clamp to SDR and now everything is fine.