Your file is underexposed and also displays excessive noise/grain when zoomed at 100%.
Hi and thanks for your input. Grain/nosie was put in on purpose as that was the way this shot was designed, So I was expecting adobe to reject on that alone. Can you explain though what you mean by the file being underexposed. When you look at the Histogram on LR its on the high side? Always something to learn in this game.
Screen shot below>
Zoom to 100% and you will observe that the image is not very lighted. It is a little on the darker or shadowy grey side. The white is not very white. The histogram is showing high highlights. Take down the highlights, and increase exposure.(You might also need to adjust white.) You will notice the image gets whiter.
The adjustments I made is as follows:
Reduce temperature (It was a little too warm. White should be white)
Increase tint a bit
Reduce highlights a lot
By reducing highlights, white, black, and shadow, the histogram moves left.
Increase exposure get the correct exposure, thus removing shadow appearance from where it does not belong.
I also increase contrast a bit.
By I was done, the histogram peak was closer to the center.
Gain some separation of an idea of how your finished image should look. Most likely not exact, but close:
While editing I also noted that some of your edges are not entirely sharp. It would appear you did not take the shot with enough depth of field.
Your histogram actually indicates slight overexposure, so I think you have to decrease your exposure a bit - this will give a bit more detail in the garlic - and increase the whites. Also, decrease the temp slider a bit to more blue in order to take out the yellow cast. You need to bring in just a bit more shadow detail - something like this:
The review process is done by humans. (This is what we are told.)
Yes, you can resubmit the same image after making changes, and no, you can't delete it from the rejections page. They are only thumbnails and they are not used by Adobe. They are there for your record. Don't worry about it.
In addition to the answer to your questions, and to answer "how long does it takes?"
Immediately you see the rejection, or receive the rejection notice and/or any time thereafter you may make the adjustments and resubmit.
Thank you for the clarification 👍