This is the histogram I got and shown to you with individual RGB channels,
there are spikes but I don't see gaps. It just look like many of my 5D II
RAW converted files.
http://www.accura.com.hk/Rhody-h.jpg
C.H.Ling
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Saturday, April 30, 2011 8:46 AM
Subject: Re: [OM] IMG: Rhody After the Storm
> Correction. I do believe the histogram visible now is exactly the same
> as I saw before. I was confused by the lack of gaps in the bright bits.
> There are none visible in the overall luminosity histogram but they
> are very visible in the individual RGB channels. That is what I recall
> seeing and what I described in my first mail.
>
> Chuck Norcutt
>
>
> On 4/29/2011 8:43 PM, Chuck Norcutt wrote:
>> I never saw a histogram as you show for "Top is as it came off the web".
>> If I did I would never have described it as having spikes and gaps.
>> The histogram that I saw looked (and still does look) similar to the
>> levels manipulation in the middle. Perhaps Jim has been toying with the
>> image since it still looks similar to but not quite as bad as what I
>> recall seeing the first time.
>>
>> Yes, the bottom is what I would call smooth but even the top isn't bad.
>> I just never saw that histogram before. Check the image now and
>> you'll see that the top histogram doesn't match the current image. I
>> recall the original as having gaps in the bright bits. Now there are
>> lots of short fat spikes in the bright bits.
>>
>> Chuck Norcutt
>>
>>
>> On 4/29/2011 7:24 PM, Moose wrote:
>>> On 4/29/2011 8:33 AM, Chuck Norcutt wrote:
>>>> I don't normally look at histograms of photos other than my own.
>>>> However, this image struck me as looking not quite smooth and I didn't
>>>> understand why. That's when I looked at the histogram and saw what I
>>>> considered to be lots of 8-bit luminance bending due to the spikes in
>>>> the shadows and holes in the bright bits.
>>>
>>> Perhaps it's a matter of degree. Here are three histograms from the
>>> Rhody image.
>>> <http://galleries.moosemystic.net/MooseFoto/index.php?gallery=Tech/Misc&image=RhodyHist.jpg>
>>>
>>> Top is as it came off the web. Most of us interpreted it as pretty
>>> smooth overall, with some signs of extensive
>>> manipulation. I assume (Yes, risky.) that you are referring to the
>>> smallish spikey protrusions in the middle and spiky
>>> troughs up higher?
>>>
>>> Middle is a simple manipulation with Levels in 8 bit. This is what I
>>> think of from your description "spikes in the
>>> shadows and holes in the bright bits."
>>>
>>> I suppose the bottom is closer to what you would call smooth, and likely
>>> not altered in 8-bit?
>>>
>>> Moose
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