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Since there have been more than a few requests to have the contrast rejection split into two separate reasons (Too Much or Too Little), it might be a good idea to clarify why this is not a change the crew intends to proceed with any time soon.
First, by making this change it would imply that to fix a rejection, one would simply need to add (or subtract) contrast, and the image be should then be acceptable. This is simply not the case in the majority of contrast rejections. A majority of contrast rejections are due to poor overall lighting (resulting from overcast or hazy weather conditions) which no amount of editing would make suitable for JP. Someone receiving a Contrast Too Low rejection for such an image would logically conclude that by simply adding contrast, the image would then be suitable, something that is quite unlikely. This is an example of weather conditions that pretty much preclude the chance an image would be acceptable for JP:
- if you're faced with conditions like this -or worse-, take photos as you please, but do realize that there is unfortunately little to no chance your image will be suitable for JP
Second, without relying on being told what the exact issue is, it is hoped that photographers can try to sort the issue out themselves, both saving the crew time, and hopefully improving the eye and technique of the photographers. A big part of this is being able to read the histogram correctly. While the histogram can't always predict whether an image deserves a contrast rejection, it usually does give a good general indication of whether contrast might be an issue. This is not to say you can rely completely on the histogram to judge contrast (an aircraft in the shadow in the foreground with a bright background would look fine on the histogram, but would almost certainly be rejected), but it is definitely a tool worth learning how to use. You can see from these examples that the histogram can often be a good guide as to whether the contrast may be acceptable or not:
- Notice the large gaps on the edges of the first histogram indicating weak shadows and dull highlights. The second (middle) while still a bit flat, shows improved contrast, as the edges are closer to the middle. The final histogram has large spikes on the edges indicating both very strong shadows and clipped highlights, a good indication that the contrast is too strong in this case.
Finally, the vast majority of rejections are for a lack of contrast, so one can assume that is likely what the issue is. The next step after a contrast rejection would be to assess whether the conditions were good enough (as hinted at in the first point above, this should also be the first step before submitting. Recognizing unworkable conditions will help avoid many a contrast rejections in the first place). If this is the case, one can check the histogram to consider whether simply adding contrast will suffice, or even appeal if one feels certain the contrast is acceptable. If this is not the case, then consider that the image may not be fixable (or suitable in the first place) for uploading. If one is unsure at any of these points, it's strongly encouraged to use the Processing and Feedback forum to seek advice.
First, by making this change it would imply that to fix a rejection, one would simply need to add (or subtract) contrast, and the image be should then be acceptable. This is simply not the case in the majority of contrast rejections. A majority of contrast rejections are due to poor overall lighting (resulting from overcast or hazy weather conditions) which no amount of editing would make suitable for JP. Someone receiving a Contrast Too Low rejection for such an image would logically conclude that by simply adding contrast, the image would then be suitable, something that is quite unlikely. This is an example of weather conditions that pretty much preclude the chance an image would be acceptable for JP:
- if you're faced with conditions like this -or worse-, take photos as you please, but do realize that there is unfortunately little to no chance your image will be suitable for JP
Second, without relying on being told what the exact issue is, it is hoped that photographers can try to sort the issue out themselves, both saving the crew time, and hopefully improving the eye and technique of the photographers. A big part of this is being able to read the histogram correctly. While the histogram can't always predict whether an image deserves a contrast rejection, it usually does give a good general indication of whether contrast might be an issue. This is not to say you can rely completely on the histogram to judge contrast (an aircraft in the shadow in the foreground with a bright background would look fine on the histogram, but would almost certainly be rejected), but it is definitely a tool worth learning how to use. You can see from these examples that the histogram can often be a good guide as to whether the contrast may be acceptable or not:
- Notice the large gaps on the edges of the first histogram indicating weak shadows and dull highlights. The second (middle) while still a bit flat, shows improved contrast, as the edges are closer to the middle. The final histogram has large spikes on the edges indicating both very strong shadows and clipped highlights, a good indication that the contrast is too strong in this case.
Finally, the vast majority of rejections are for a lack of contrast, so one can assume that is likely what the issue is. The next step after a contrast rejection would be to assess whether the conditions were good enough (as hinted at in the first point above, this should also be the first step before submitting. Recognizing unworkable conditions will help avoid many a contrast rejections in the first place). If this is the case, one can check the histogram to consider whether simply adding contrast will suffice, or even appeal if one feels certain the contrast is acceptable. If this is not the case, then consider that the image may not be fixable (or suitable in the first place) for uploading. If one is unsure at any of these points, it's strongly encouraged to use the Processing and Feedback forum to seek advice.
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