What these photos are rejected?

[quantum-bit]

Dear Community, could somebody help me understand, why these photos were rejected?

They are taken via Sony A6700 + Tamron 17-70, processed in darktable 5.

Thank you very much in advance!

[daniellei4510]

Underexposure. You would probably also need a model release for the middle photo, since the subject could identify themselves by the unique fashion ensemble.

[quantum-bit]

OK, thanks!

[Nancy OShea]

Also, PNG is for images containing transparency. 

You should submit your photographs as JPEGs with sRGB color mode.

Photo and Illustration Requirements:

https://helpx.adobe.com/stock/contributor/help/photography-illustrations.html

[quantum-bit]

Thanks! These photos are definitely JPEGs with sRGB color space.

[Abambo]

What was the rejection reason? I would guess quality, but there may also be IP reasons to reject each of your assets. And your second one needs also model releases for each of the recognizable people. 

(1) probably model release needed.

(2) IP violation, edit out (or get a property release).

[quantum-bit]

The reasons for the first and the third images are "Quality Issues", for the second "Intellectual Property Refusal".

[RALPH_L]

All of the photos have exposure issues.

The first needs an IP release and is poorly cropped.

The second needs IP and model releases.

The third is poorly cropped and probably has no commercial value.

[quantum-bit]

Thanks!

[Nancy OShea]

Your images must be suitable for commercial use in print, digital or merchandise

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html
• https://helpx.adobe.com/stock/contributor/user-guide.html/stock/contributor/help/photography-illustr...
• https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html
• Model/Property Releases:
  https://helpx.adobe.com/stock/contributor/help/model-release.html
  https://helpx.adobe.com/stock/contributor/help/property-release.html
  
  

Below, I used Photoshop to add a Levels Adjustment Layer to balance shadows & highlights.

The left half is your original, the right half shows adjustment.

[quantum-bit]

Thanks, Nancy!

[Jill_C]

All are underexposed and not well composed. The second one would need model releases for all of the recognizable people in the image, including the ones with their backs turned.

[quantum-bit]

Thank you, Jill!

[quantum-bit]

The histogram for the first photo look like this:

Is it possible to somehow see from the histogram itself that the photo is underexposed?

It looks good to me (I do not trust my eyes much as I am a novice and do not work in a photo-studio environment, so I try to rely on provided image statistics), although I have just tried to increase exposure one more EV, and the histogram almost hits the right boundary but still stays within.

[Nancy OShea]

This is a better question for the Photoshop or Lightoom Communities where you can delve much deeper.  But I'll try to provide a short overview here. 

The histogram is a graph that displays the distribution of tonal values (dark to bright). 

The horizontal axis represents the brightness range, from pure black (left) to pure white (right) with midtones in the middle.  

The vertical axis represents the number of pixels at each level.

The Histogram's Shape:

• Centered: For average scenes, a histogram spread across the entire range with peaks centered in the midtones suggests good exposure.
• Left-Skewed: Typically indicates underexposure, suggesting more dark tones are present.
• Right-Skewed: Indicates possible overexposure, suggesting more bright tones are present.
• High Contrast: A "U" shaped histogram with peaks at both ends suggests a scene with a wide range of tones, from deep shadows to bright highlights.
• Low Contrast: A narrow histogram clustered in the middle suggests a scene with a limited range of tones. 

Look for Clipping:

• Shadow Clipping: A sharp peak on the left side indicates areas of pure black with no detail.
• Highlight Clipping: A sharp peak on the right side indicates areas of pure white with no detail. 
• Clipped details are lost & can't be recovered in post-processing.

In-Camera Histogram, what to be aware of: