Saving RAW file with HDR as JPEG looks dull not bright

Forum|Forum|1 year ago
September 14, 2024
2 replies
14203 views

Hi all, I shoot in RAW and edit using HDR but when I save the photo as JPEG it looks dull and not like HDR? I tick the HDR Output box in settings when exporting. Any idea what I am doing wrong?

Two examples below. Thanks!

macOS

E

ExUSA

Legend

Just to add, most people still do not have HDR displays or software that will display HDR. I have a pair of wide-gamut 4k HDR displays which honestly look amazing with the right content, but stick to SDR and sRGB for export because I want my work accessible.

A

Augnos

Participating Frequently

True for computer displays and TVs, but anyone with a generally recent smartphone has an HDR display in their pocket. My images are primarily for Instagram and it's the best way for me to show off HDR images and edits to a wide audience, and has been for some time now. JPEG gain maps allow me to make sure the SDR versions look good as a fallback for those without HDR displays or have HDR turned off as well.

S

Shivani Somayajula

Participating Frequently

Hey there, Welcome to the Photoshop Community.

JPEG cannot store HDR data. Use a format such as AVIF that does support HDR.

Please check here for more details: https://adobe.ly/3XtIQOb

Let us know how it goes.

Thanks,

Shivani

A

Augnos

Participating Frequently

This is incorrect, I export JPEGs with HDR in lightroom all the time, and they look perfectly fine on Instagram. Does Photoshop not allow HDR exports? I want to collage multiple HDR photos with artboards to fit more than one photo on an instagram slide, and there currently doesn't seem to be any collaging apps that support HDR exports.

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Augnos

Participating Frequently

@Augnos Thanks for showing the additional info. From Lightroom you are exporting a jpeg with gain map, which I mentioned earlier. The jpeg image itself is 8 bit which has pixel values of 0-255 in each RGB channel. The additional gain map can be read by a viewer or browser that supports it, to translate those values on each pixel (rather than across the image as given by a normal transfer curve) and hence extend the range. So two pixels share the same 8 bit value but result in different values sent to screen. So it is a clever waay of extending the jpeg 8 bit image limitation.

The HDR-P3 you show uses the P3 primaries of the industry standard wide gamut P3 colour space but with a different transfer curve , which is used to extend the range beyond that of the SDR Display P3 colour space, made available via the additional gain map. A kind of fudge - but a very clever one.

Dave

Gotcha, thanks for that, I assumed the gain map was embedded into the JPG file, not as an extended bit of info that goes alongside the original 8-bit image.

@16046976 Digging through Greg Benz workflow, and I think I might have found a solution. It appears photoshop doesn't detect gain maps from JPEGs, which is a little frustrating, but I think Greg's tools will be able to help me get what I want. Thanks to both of you!

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