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What are these blue pixels?!?
Hello- The below blue pixels dissapear when I open this RAW file in Elements, any idea why I see them here in ACR?ThanksJS.

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Comments (7)

Knight06 wrote:.

Hello- The below blue pixels dissapear when I open this RAW file inElements, any idea why I see them here in ACR?ThanksJS.

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I am sure your blue's saturation is kicked way up. Click on the blue channel and reduce the saturation. Might try posting this in the retouching forum also.Debbie..

Comment #1

Knight06 wrote:.

Hello- The below blue pixels dissapear when I open this RAW file inElements, any idea why I see them here in ACR?.

Look at the histogram in the upper-right corner. The right side of a histogram represents bright values...the left side represents dark values. Notice the white triangle in the upper-left corner of the histogram. Notice the high blue peaks on the left side of the graphs. Notice that the graphs show virtually nothing near the right side..

What all this is trying to tell you (unsuccessfully) is:.

The windows of the black mini-van have blue values = zero.The picture is underexposed.The blue channel is especially weak..

Grab the exposure slider with your mouse and move it to the right. This will increase the exposure. Continue to move it until the triangle in the upper-right corner of the histogram turns white...then back off a bit. This should help with the "blue pixels" on the picture..

Some "versions" of ACR have controls that allow you to turn off the blue "overly dark" indication. I'm not sure exactly how you are running ACR? When I launch PSE5 and load a RAW image, the ACR that comes up has a button to the right of the Preview button that allows you to select whether the blue indications appear..

There is also a bunch of red pixels that can show where blown highlights are located. Once again on my ACR I can choose whether or not to look at these..

Notice the 3 lines below the histogram that read:.

R: G: B:.

Move your cursor over the picture and the RGB color values at that spot are displayed. Move the cursor over the blue pixels and notice that these values are VERY low. They all will probably be zero..

This picture needs the WB set. Your version of ACR has a WB setting tool. Click on the eyedropper tool in the top bar and then click on the (presumably) white PT Cruiser. Voila!.

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Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #2

Based upon your histogram, it's your shadow area which is "totaly black" The Blue is kinda a warning..

Since this is a Raw exposure, it may be possible to correct this with the exposure control. Try sliding it to the right. Watch the histograms left side and when you no longer have vertical spikes at the very left side, the Blue should also be gone.If some Blue and a spike remain, it's because something is beyond recovery..

If you slide the exposure control to far to the left, your highlights will be blown out, this may be shown in the pictire with Red instead of blue..

Tom..

Comment #3

Try hitting the reset button and see if ACR is remembering it's last used settings......Dennis..

Comment #4

Tnordahl wrote:.

If you slide the exposure control to far to the left, your highlightswill be blown out, this may be shown in the pictire with Red insteadof blue..

Moving the exposure slider to the right, not to the left, will increase the exposure and blow the highlights which WILL be shown in red, if the "show blown highlights" is selected..

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #5

Chuxter wrote:.

Tnordahl wrote:.

If you slide the exposure control to far to the left, your highlightswill be blown out, this may be shown in the pictire with Red insteadof blue..

Moving the exposure slider to the right, not to the left, willincrease the exposure and blow the highlights which WILL be shown inred, if the "show blown highlights" is selected..

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/.

I knew that Charlie! I just - eh -well - messed up:)Tom..

Comment #6

But I was not sure the OP knew you messed up....

-Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #7

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