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Thread started 10 Apr 2009 (Friday) 19:01
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The Great LCD Preview Image Mystery.

 
Mike-DT6
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Apr 10, 2009 19:01 |  #1

Well, it's a bit of a mystery to me!

Does anyone happen to know what processing the camera applies to its JPG preview image in order to make it look infinitely better than the RAW file within?

I presume it is a standard set of instructions that are applied each time, and I presume it would be the same across different Canon camera models. It would be interesting to know what is done, if only so that an exact replica of what the camera shows you can be created out of the RAW file it leads you to believe is that spectacular in the first place!

Mike

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Apr 10, 2009 20:29 |  #2

Wondering if it's the selected Picture Style...


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Mike-DT6
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Apr 10, 2009 22:27 |  #3

Sorry, I forgot to mention that this is with no picture style selected - just whatever the camera does to its standard JPG preview images to make them look relatively spectacular, when compared with the RAW image it is showing a preview of.

Mike

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blackcap
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Apr 11, 2009 05:39 |  #4

I've also wondered this! The same with Lightroom when it initially displays the thumbnail of a RAW image, then reverts to the unprocessed version. I want an option that applies whatever processing it did to display that initial thumbnail!


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Apr 11, 2009 05:49 |  #5

It's not just because it's a smaller image and thus the flaws are not apparent, is it?


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Apr 11, 2009 06:07 |  #6

blackcap wrote in post #7708741 (external link)
I've also wondered this! The same with Lightroom when it initially displays the thumbnail of a RAW image, then reverts to the unprocessed version. I want an option that applies whatever processing it did to display that initial thumbnail!

Both the LCD and Lightroom use the embedded jpeg in the RAW, which is based on the selected picture style. So, anything that boosts saturation etc., in there will apply that to the thumbnail used for the LCD preview and also the image shown by Lightroom until it loads the RAW, when it will suddenly lose the saturation etc. that was applied to the jpeg in camera.

To the OP: I'm not sure you can have 'no picture style selected'. You may not have chosen one, but the camera needs parameters to make the jpeg, so will have a default picture style. I use either 'faithful' or 'neutral' to keep the jpeg as close to the RAW as possible (it also gives a more accurate histogram etc).

To Blackcap: I know what you mean, the images do sometimes seem to lose some 'pop' when lightroom switches from jpeg to RAW, however that is simply because you haven't converted the RAW yet, once you have added the saturation, contrast, colour balance, etc. that you want, it should look better than the embedded jpeg you first saw (if it doesn't, shoot jpeg as the camera is doing a better job than you ;)).

Of course, I presume that you mean you would prefer that as a starting point. I know my Lightroom (v1) can't do that but I'm not sure about later versions which have been much upgraded and may have added that feature. If not, DPP can apply the 'as shot' picture style and (I think) allows you to select the different picture styles and see how each looks. I also believe that you can download more styles as well.

I'm not a DPP user though, so can't be more specific I'm afraid.




  
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Apr 11, 2009 06:19 |  #7

Mike-DT6 wrote in post #7707631 (external link)
Sorry, I forgot to mention that this is with no picture style selected - just whatever the camera does to its standard JPG preview images to make them look relatively spectacular, when compared with the RAW image it is showing a preview of.

Mike

:-)

There is always a Picture Style selected, even if it is only Neutral which is the least pumped up style. And every Picture Style has its own set of parameters - contrast, saturation and sharpness. (The exceptions are older models such as the 20D or 350D which in effect had just one style which was close to Neutral) Whichever P.S. is set in the camera (the default is Standard, which has a fair amount of boosting done to it) will be applied to the display jpg embedded in a RAW.
What the conversion done to the RAW will look like depends very much on the converter. If you use Canon's DPP, the converter knows what the camera did and defaults to a conversion that is very similar to the embedded jpg. Canon's Zoombrowser comes even closer. Third party converters have in the past had ther own default preliminary conversions that were different - not better or worse, different. Today however, the current versions of Lightroom and PSCS/ACR come equipped with optional Camera Profiles that are (fairly successful) attempts to recreate Canon's in-camera processing and will give you "straight out of the box" conversions that resemble the jpgs.


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DStanic
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Apr 11, 2009 07:25 |  #8

As mentioned by others, it will have a picture style selected (even if it is "standard" in the camera)

And as Elie mentioned, getting it to look right in Lightroom is most likely due to the camera profiles in LIghtroom. When I started out using LR I had this problem as well. Before, LR only had "ACR 4.4" as the default profile. This made my images look yellowish and washed out compared to the LCD on the camera. When I did some updates and added a bunch of profiles, such as "Adobe Standard" and "Portrait" (amoung others.. those 2 are my favorites) it drastically changes the look of the image in one click. When you are in "Develope" mode it's on your main right pane under "camera calibration". Hope this helps!


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rammy
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Apr 11, 2009 07:33 |  #9

The LCD is set much brighter for you to be able to view the image outside in daylight. Try it yourself, change the brightness on the LCD and view the image and see how you lose and gain that pop.

Set your preview to show the image and info so you can check the histogram of the images you take. That way you can tell if the exposure is right.


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JeffreyG
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Apr 11, 2009 08:28 |  #10

Also, if you restrict yourself to printing no bigger than 2.5" x 2.5" you will find that things like blur and focus accuracy become abstract concepts.


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Mike-DT6
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Apr 15, 2009 23:21 |  #11

Thanks for your replies everyone :-) I didn't get any e-mail notification, so thought that there weren't any more replies!

When I said about having no picture style selected, I was referring to 'Standard', which is what my camera is set to. I took that to be a setting whereby no style is added, but if it is actually a style then that answers my question! It's obviously processing the image according to whatever changes constitute the 'Standard' style then, which is a bit silly because I have it set to RAW only!

I assumed that no style was added under the 'Standard' setting because the camera is set to RAW only, so for the camera to have no option but to apply a style to the preview image of a camera that is set to RAW-only seems misleading.

Anyway, problem solved now! Thanks everyone :-)

Mike

PS - no I don't print at 2.5" x 2.5" :lol: I was on about overall 'look' and not the finer details of the image!


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The Great LCD Preview Image Mystery.
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