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night photography niose reduction? and raw conversion
I have been shooting night photography in raw format using iso 100 and long shutterspeeds, (around 30sec.) and after converting in canon's DPP I find the images to be quite noisy. I have tried the noise reduction feature of DPP and see no difference from before I apply the reduction. Is there another program I need for noise reduction, or should DPP do the trick and i'm just not using it properly?.

Also, I have photoshop CS2. When I open the raw image from DPP into CS2 and manipulate it in CS2 is there any way I can convert it to jpeg from cs2 or can it only be saved in tiff or psd ect..

I am a college student on a budget so free options if available would be optimal...

Comments (7)

You may need to take a 30sec dark frame (with the lenscap on) and subtract that from the image. What you may be seeing are hot pixels which noise reduction is not very effective at removing. It's usually best to take the darkframe at the time of the photo so that the temp of the camera is the same, but it's not entirely necessary so you could try it now.A member of the rabble in good standing..

Comment #1

I am using a canon digital rebel xti (400d)..

Comment #2

Sn0man wrote:.

I have been shooting night photography in raw format using iso 100and long shutterspeeds, (around 30sec.) and after converting incanon's DPP I find the images to be quite noisy..

Are you using DPP to increase the exposure? In other words are the images under-exposed? Seems to me that DPP introduces a lot of white speckles into under-exposed images which I don't get with ACR or Capture One, but I don't claim to be an expert with DPP nor RAW editing in general..

Is there another program I need for noisereduction....

I think 3rd party noise reduction software is considered better than what's in DPP or Adobe or whatever. Some are available as plug-ins which can be used from inside Photoshop. Below are a few..

Noisewarehttp://www.noiseware.com/.

Neat Imagehttp://www.neatimage.com/.

Noise Ninjahttp://www.picturecode.com/.

...there any way I can convert it tojpeg from cs2 or can it only be saved in tiff or psd ect..

Well if there are no layers in the edited image then can save it as a jpeg with no problem. Just chose the save as format you want from the drop down list..

I am a college student on a budget so free options if available wouldbe optimal..

Don't know of any free options..

Good Day,Roonal.

'Money doesn't buy happiness, but it makes for an extravagant depression' by golf tournament sportscaster..

Comment #3

Thanks for the reply. I do change exposure in DPP for my night pictures a bit along with tweaking sharpness, contrast and saturation. I did notice those white speckles you mentioned when I played with the exposure more. I see those also become a little more obvious when I increase the sharpness even when not touching the exposure. I believe those speckles are the noise I was talking about..

In photoshop I have been working with the levels, and layer masks on the raw files. Since I do have layers am I then unable to save in jpeg?.

Thankyou for you time..

Roonal wrote:.

Sn0man wrote:.

I have been shooting night photography in raw format using iso 100and long shutterspeeds, (around 30sec.) and after converting incanon's DPP I find the images to be quite noisy..

Are you using DPP to increase the exposure? In other words are theimages under-exposed? Seems to me that DPP introduces a lot of whitespeckles into under-exposed images which I don't get with ACR orCapture One, but I don't claim to be an expert with DPP nor RAWediting in general..

Is there another program I need for noisereduction....

I think 3rd party noise reduction software is considered better thanwhat's in DPP or Adobe or whatever. Some are available as plug-inswhich can be used from inside Photoshop. Below are a few..

Noisewarehttp://www.noiseware.com/.

Neat Imagehttp://www.neatimage.com/.

Noise Ninjahttp://www.picturecode.com/.

...there any way I can convert it tojpeg from cs2 or can it only be saved in tiff or psd ect..

Well if there are no layers in the edited image then can save it as ajpeg with no problem. Just chose the save as format you want from thedrop down list..

I am a college student on a budget so free options if available wouldbe optimal..

Don't know of any free options..

Good Day,Roonal.

'Money doesn't buy happiness, but it makes for an extravagantdepression' by golf tournament sportscaster..

Comment #4

Sn0man wrote:.

In photoshop I have been working with the levels, and layer masks onthe raw files. Since I do have layers am I then unable to save injpeg?.

When you are finished editing, you need to flatten the layers, then you will be able to save it as a jpg. The jpeg format does not support image layers..

Brian A...

Comment #5

You are shooting ISO 100 with a DSLR and having noise problems? That does not sound right. I shoot fireworks and other long exposure shots with my DS and never have any noise except for the occasional hot pixel...

Comment #6

Sn0man wrote:.

I have been shooting night photography in raw format using iso 100and long shutterspeeds, (around 30sec.) and after converting incanon's DPP I find the images to be quite noisy. I have tried thenoise reduction feature of DPP and see no difference from before iapply the reduction. Is there another program I need for noisereduction, or should DPP do the trick and i'm just not using itproperly?.

I'm not a Canon user, but I would be surprised if it doesn't automatically do a dark frame subtraction of a 30 second exposure. Check your manual? Perhaps there is an option in some menu to turn this feature on/off?.

As Roonal said, the big 3 NR programs are noiseware, neat image, and noise ninja. They offer free (trial) versions. Get the free noiseware program and try it..

If your long exposures are badly underexposed, try this trick in PS....

Duplicate the image in a new layer. Set the layer mode to "screen". This should lighten the image. If you need more lightening, do it again (ie, duplicate the top layer)....

Why not show us a copy of an image that is noisy?.

Also, I have photoshop CS2. When I open the raw image from DPP intoCS2 and manipulate it in CS2 is there any way I can convert it tojpeg from cs2 or can it only be saved in tiff or psd ect..

I don't have CS2, but PSE automatically flattens if I ask to save an image with layers..

I am a college student on a budget so free options if available wouldbe optimal..

Any college student with a Canon dSLR and CS2 is NOT poor! .

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

Comment #7

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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