Enhance a photo?

rockinaway · 03-14-2007, 11:13 AM

I am taking pictures of cricket from my TV. So while watching I zip out my camera and take a snap. However with, as many TVs do, I get these wierd streaks and stuff on my pictures. Is there anyway to clear the pictures, any software? I can only get some out at the moment

Changeling · 03-14-2007, 01:58 PM

I speak here as a former professional photographer.

Taking photos of TV screens has always been technically difficult. Its down to the flicker rate of the TV. TV's do things a lot slower that cameras.

Unfortunately you have not said which country you are in. TV picture quality is not the same the world over. Nor have you said which camera you have in terms of technical ability.

You need to turn the camera shutter speed down as far as you can, If you can. 30th of a second or more should do it.

Focus and depth of field are not an issue as the TV screen is flat so camera aperture can afford to be wide open.

OR......

You could get a TV card in your PC and use the frame capture feature.

**Fox** · 03-14-2007, 02:01 PM

Also, LCDs are not susceptible to this phenomenon, so if you know somebody who has one, you can take pictures of theirs without worrying about this.

rockinaway · 03-14-2007, 02:45 PM

I think you are thinking of the lines you get vertically... here is what I mean..

http://img57.imageshack.us/my.php?image=p3140051oq0.jpg

Those lines which go any way...

**Fox** · 03-14-2007, 03:36 PM

That's an effect called moiré, where the vertical and horizontal lines of your TV don't line up properly with the rows and columns of pixels in your digital camera.

rockinaway · 03-14-2007, 03:38 PM

So what do I do to get rid of them?

rockinaway · 03-14-2007, 03:42 PM

I tried it on Photo Impact but it didn't remove it fully :(

**Fox** · 03-14-2007, 03:43 PM

There's really very little that can be done to avoid this. If the camera is perfectly level with a screen with completely straight rows and columns, then you could theoretically get a picture without this effect.

If this is very important to you, then you'd be better off running the cable into your computer through a capture card and taking screen shots.

rockinaway · 03-15-2007, 02:35 AM

Hmm my PC is upstairs... what does this require?

**koala** · 03-15-2007, 04:02 AM

You need a TV capture card and a cable to link your TV or video to the card. This allows you to capture full-motion video or single frames digitally without the moiré interference.

rockinaway · 03-15-2007, 11:06 AM

Hmm guess I will have to align myself properly. I can capture a TV screen as I have the Picture button on my remote where it stops the TV picture..

03-14-2007, 11:13 AM	#1 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Enhance a photo? I am taking pictures of cricket from my TV. So while watching I zip out my camera and take a snap. However with, as many TVs do, I get these wierd streaks and stuff on my pictures. Is there anyway to clear the pictures, any software? I can only get some out at the moment

03-14-2007, 01:58 PM	#2 (permalink)
Changeling Registered User Join Date: Nov 2005 Location: UK Posts: 423 OS: XP, Waiting for Vista serivce pack 1 before I commit.	Re: Enhance a photo? I speak here as a former professional photographer. Taking photos of TV screens has always been technically difficult. Its down to the flicker rate of the TV. TV's do things a lot slower that cameras. Unfortunately you have not said which country you are in. TV picture quality is not the same the world over. Nor have you said which camera you have in terms of technical ability. You need to turn the camera shutter speed down as far as you can, If you can. 30th of a second or more should do it. Focus and depth of field are not an issue as the TV screen is flat so camera aperture can afford to be wide open. OR...... You could get a TV card in your PC and use the frame capture feature. __________________ If it ain't broke don't fix it!

03-14-2007, 02:01 PM	#3 (permalink)
Fox TSF Enthusiast Join Date: Sep 2002 Location: NJ Posts: 7,752 OS: XP Pro, CentOS My System	Re: Enhance a photo? Also, LCDs are not susceptible to this phenomenon, so if you know somebody who has one, you can take pictures of theirs without worrying about this. __________________ Antec Neo Power 500W, ABIT IP35-E, Intel E2180@2.66Ghz, Corsair XMS2 2x1GB DDR2-800, PNY 8800GT, 320GB Seagate * lazy college student alert *- If I've inadvertently ignored a thread, please Let me know about it Have I helped you solve your problem? Donate to Techsupportforums Klart Skepp!

03-14-2007, 02:45 PM	#4 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Re: Enhance a photo? I think you are thinking of the lines you get vertically... here is what I mean.. http://img57.imageshack.us/my.php?image=p3140051oq0.jpg Those lines which go any way...

03-14-2007, 03:36 PM	#5 (permalink)
Fox TSF Enthusiast Join Date: Sep 2002 Location: NJ Posts: 7,752 OS: XP Pro, CentOS My System	Re: Enhance a photo? That's an effect called moiré, where the vertical and horizontal lines of your TV don't line up properly with the rows and columns of pixels in your digital camera. __________________ Antec Neo Power 500W, ABIT IP35-E, Intel E2180@2.66Ghz, Corsair XMS2 2x1GB DDR2-800, PNY 8800GT, 320GB Seagate * lazy college student alert *- If I've inadvertently ignored a thread, please Let me know about it Have I helped you solve your problem? Donate to Techsupportforums Klart Skepp!

03-14-2007, 03:38 PM	#6 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Re: Enhance a photo? So what do I do to get rid of them?

03-14-2007, 03:42 PM	#7 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Re: Enhance a photo? I tried it on Photo Impact but it didn't remove it fully :(

03-14-2007, 03:43 PM	#8 (permalink)
Fox TSF Enthusiast Join Date: Sep 2002 Location: NJ Posts: 7,752 OS: XP Pro, CentOS My System	Re: Enhance a photo? There's really very little that can be done to avoid this. If the camera is perfectly level with a screen with completely straight rows and columns, then you could theoretically get a picture without this effect. If this is very important to you, then you'd be better off running the cable into your computer through a capture card and taking screen shots. __________________ Antec Neo Power 500W, ABIT IP35-E, Intel E2180@2.66Ghz, Corsair XMS2 2x1GB DDR2-800, PNY 8800GT, 320GB Seagate * lazy college student alert *- If I've inadvertently ignored a thread, please Let me know about it Have I helped you solve your problem? Donate to Techsupportforums Klart Skepp!

03-15-2007, 02:35 AM	#9 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Re: Enhance a photo? Hmm my PC is upstairs... what does this require?

03-15-2007, 04:02 AM	#10 (permalink)
koala Moderator Hardware Team Join Date: Mar 2005 Location: UK Posts: 12,352 OS: XP/7/Ubuntu My System	Re: Enhance a photo? You need a TV capture card and a cable to link your TV or video to the card. This allows you to capture full-motion video or single frames digitally without the moiré interference. __________________ New members: Subscribe to your thread (Thread Tools) to receive an instant email notification when you get a reply. TSF Folding@Home Team 85015 - details here

03-15-2007, 11:06 AM	#11 (permalink)
rockinaway Registered User Join Date: Jun 2006 Posts: 296 OS: Vista	Re: Enhance a photo? Hmm guess I will have to align myself properly. I can capture a TV screen as I have the Picture button on my remote where it stops the TV picture..