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Changing photo dimensions after the fact
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Mar 10, 2013 11:11:34   #
GHK Loc: The Vale of Eden
 
[quote=Frank T]You can reduce the resolution to 600x450 quite easily but it will significantly effect the quality of the image.

And How!!!!!!!!! And then some!!!!!!!
A digital file consists of, surprise, surprise, loads of digital information. The compresion cited will discard 97.3%, YES 97.3% of the information from your original image.
GHK

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Mar 10, 2013 11:16:37   #
Wabbit Loc: Arizona Desert
 
loui wrote:
You should always shoot using the maximum number of pixels don't reduce this. You need all you got if you happen to make a fairly large print. You cannot notice (usually) much different where you're looking because you camera sensor has several times more pixels than your display - HD displays are about as good as you can get at 2 MP. There area some computer displays to 3.5 MP. But your prints will show the difference. You also need max pixels in case you crop - sometimes there is a good "Sub-picture" you can bring out. You should edit every photo using any computer editor - one comes free on the computer such as Photo Gallery or iPhoto. This will let you crop the photo to help its composition, and you can change its aspect ratio - keep in mind ready-made frame sizes (ratios) at the hobby store to save money framing. You need to begin a picture wall with your best framed work.
You should always shoot using the maximum number o... (show quote)


Hey Doc ..... it's always better to have it and not need it vs. need it and not having it

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Mar 10, 2013 12:45:25   #
singleviking Loc: Lake Sebu Eco Park, Philippines
 
Frank T wrote:
You can reduce the resolution to 600x450 quite easily but it will significantly effect the quality of the image. 600x450 is okay for an email but you won't be able to print it.


In the S8200 CD manual, on page 18 of the "Editing Still Images" section, the menu functions for reduced resolution for internet use are described. This does not alter the original photo file contained in the camera or SD card file when used as a file transfer and the original file is not deleted after download to a TX device or computer is completed. This is described on page 18 of the "editing still image" section of your CD manual.
Also, for your contrast and white balance issues, there is full description of the "in camera" compensation techniques available in the manual. In order to really see what these compensation methods accomplish, you should play with them to determine which ones will work for the situation at hand and lighting situation.

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Mar 10, 2013 14:13:51   #
singleviking Loc: Lake Sebu Eco Park, Philippines
 
loui wrote:
You should always shoot using the maximum number of pixels don't reduce this. You need all you got if you happen to make a fairly large print. You cannot notice (usually) much different where you're looking because you camera sensor has several times more pixels than your display - HD displays are about as good as you can get at 2 MP. There area some computer displays to 3.5 MP. But your prints will show the difference. You also need max pixels in case you crop - sometimes there is a good "Sub-picture" you can bring out. You should edit every photo using any computer editor - one comes free on the computer such as Photo Gallery or iPhoto. This will let you crop the photo to help its composition, and you can change its aspect ratio - keep in mind ready-made frame sizes (ratios) at the hobby store to save money framing. You need to begin a picture wall with your best framed work.
You should always shoot using the maximum number o... (show quote)


Just because your display shows only 1920 X 1280 resolution, doesn't mean that when you enlarge a photo, you will get less resolution on your display. Your monitor always tries to display the image that it's set for. If the data is present in the file to resize the display image to larger format, the screen resolution still remains at HD or 1920 X 1280, so you can see finer details. The quality of resolution for any print is determined by the printer settings and by the photo data file that is being sent to that printer. Cropping and resizing a photo will reduce the pixel count of the photo file and pixelization will occur when the file doesn't contain enough data for proper display at the resolution and size requested. This is a function of the display driver or printer software doing fill in for missing data when too high a resolution is attempted.

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Mar 10, 2013 14:56:21   #
GHK Loc: The Vale of Eden
 
[quote=GHK The compresion cited will discard 97.3%, YES 97.3% of the information from your original image.

Sorry, i made a mistake; it is 98.3%

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Mar 10, 2013 19:53:10   #
loui
 
A display cannot show any more pixels than 2 MP because it is physically impossible, no matter what it says. A display's pixels are permanent hardware. If it says it is doing more pixels it means it is converting more pixels to its fixed pitch of 2 MP. In other words it "converts" your 16 MP or whatever in your camera to its 2 MP. You cannot possibly see a camera's pixel count in any electronic device now available. All a camera's pixels can only be seen in printing. Most really good photographers are permanently confused by this concept I don't know why.

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Mar 10, 2013 20:52:15   #
singleviking Loc: Lake Sebu Eco Park, Philippines
 
loui wrote:
A display cannot show any more pixels than 2 MP because it is physically impossible, no matter what it says. A display's pixels are permanent hardware. If it says it is doing more pixels it means it is converting more pixels to its fixed pitch of 2 MP. In other words it "converts" your 16 MP or whatever in your camera to its 2 MP. You cannot possibly see a camera's pixel count in any electronic device now available. All a camera's pixels can only be seen in printing. Most really good photographers are permanently confused by this concept I don't know why.
A display cannot show any more pixels than 2 MP be... (show quote)


Obviously your math needs tutoring. If your display has 1920 X 1280 resolution, as good HD displays do (some even have twice that now), then this calculates to 2.457 MP. But, when you enlarge your photo, you can easily display better resolution of each particular photo pixel contained in that file but the whole display can't actually show all the pixels from a file made by a 36 megapixel sensor's photo file simultaniously in the same frame limits of your display monitor (you will only display about 1/18th of the whole photo) I think you are misinterpreting a JPEG compressed photo with the RAW files and EXIF data. When displaying this RAW data, in full resolution, it will be larger than your monitors display area and therefore, a pan of the photo is required to view the complete photo. If you request "fit to page" it will be truncated or compressed so it fits on your display or printer.
Also, there are now monitors that have 4 times the FULL HD (1920 X 1280) resolution and soon SONY will release a monitor with 20 times the normal 1920 X 1280 resolution but it's price is near $100K. The display drivers and decoder chips already exist for Jumbotrons and huge monitors used in stadiums and sports complexes.

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Mar 10, 2013 21:11:56   #
dar_clicks Loc: Utah
 
bgcokeonut wrote:
I have a Nikon S8200 and love it. I shoot my pics with the dim: 4608x3456. I get excellent results and I know I use up the SD card quicker that way, it's worth it. My question is: can I change the dim to say '600x450' without compromising the pic? I have done so with a few for experiments and they look ok. My plan is to always do this afterwards. It makes for easier uploading to email, movie maker and such. Anyone know enough about this?
One other quickie: I read about changing the white balance for certain filming. I cannot do this with this Nikon. Is this totally out of the question or is there a workaround?
Thanks for the help and input. Bg
I have a Nikon S8200 and love it. I shoot my pics ... (show quote)

600x450 would yield very poor results. I don't even use that small an image for e-Mail any more. Always use the best camera capture you can, even if it means buying more and/or larger capacity cards, then reduce it in size later for e-Mail or web page use. Plus the larger image can also be used for prints or whatever else if desired. An example of "too small" is when a friend of mine had taken a photo of his mother. She later passed away and he wanted me to work on the photo to improve the background, etc. Hard as I tried, the 640 x 480 image from that old-time digital camera just wasn't good enough to allow much improvement.

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Mar 10, 2013 23:19:14   #
Wild Life Loc: Sunny Southern California
 
GHO wrote:
GoofyNewfie wrote:
bgcokeonut wrote:
Thank you. I will do that.


Click "quote reply" so we know to whom you are addressing your post
(You get the original quote in your post like this one)


Thanks
I was wondering how that worked!
GHO


Thanks GoofyNewfie, I didn't know that either.

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Mar 11, 2013 03:38:32   #
marcomarks Loc: Ft. Myers, FL
 
bgcokeonut wrote:
I have a Nikon S8200 and love it. I shoot my pics with the dim: 4608x3456. I get excellent results and I know I use up the SD card quicker that way, it's worth it. My question is: can I change the dim to say '600x450' without compromising the pic? I have done so with a few for experiments and they look ok. My plan is to always do this afterwards. It makes for easier uploading to email, movie maker and such. Anyone know enough about this?
One other quickie: I read about changing the white balance for certain filming. I cannot do this with this Nikon. Is this totally out of the question or is there a workaround?
Thanks for the help and input. Bg
I have a Nikon S8200 and love it. I shoot my pics ... (show quote)


600X450 is big enough to make a 2" wide by 1.5" tall high quality print. Does that tell you anything? You'd need about 3X more resolution than that to make a decent 4X6 print. 6X more resolution than that to make an 8X10 print.

What looks good on screen has nothing to do with what would look good printed. Computer monitors are typically displaying 72 pixels per inch wide and 72 pixels per inch tall. Prints typically require 240 to 300 dots per inch wide and tall. Pixels and ink dots are somewhat compatible words that are used for comparison regularly although they are different entities.

You want to take your shots in the highest possible resolution, save them to hard drive in that high resolution, then edit a copy of the original to the smaller size you want and save it under a different name, possibly even in a different folder so you don't accidentally overwrite the original. You never know when you might want to print a cherished photo you took at 16X20 and if you only have enough pixels for a 2X1.5, you'll be very bummed out.

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Mar 11, 2013 14:45:27   #
art pear Loc: North Dakota
 
Shoot big and resize later. If you shrink your image size in post your smaller photo should still look as good as your original on your monitor. Just don't expect to make it bigger again or to print it out and make it look good. As stated above always save the original. If you can use outlook to email it will ask you if you want to shrink the pic for email and give you some different sizes to pick from and it will not harm your original image.

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Mar 12, 2013 22:16:43   #
bgcokeonut Loc: St Petersburg, Fl
 
I did not know this. This is a very helpful point to me. Thank you.
Papa Joe wrote:
bgcokeonut wrote:
I have a Nikon S8200 and love it. I shoot my pics with the dim: 4608x3456. I get excellent results and I know I use up the SD card quicker that way, it's worth it. My question is: can I change the dim to say '600x450' without compromising the pic? I have done so with a few for experiments and they look ok. My plan is to always do this afterwards. It makes for easier uploading to email, movie maker and such. Anyone know enough about this?
One other quickie: I read about changing the white balance for certain filming. I cannot do this with this Nikon. Is this totally out of the question or is there a workaround?
Thanks for the help and input. Bg
I have a Nikon S8200 and love it. I shoot my pics ... (show quote)


Hi!
You will certainly effect the quality of the photo, especially if you later decide to blow it up considerably. What I do is shoot the largest image. When I want to email it to someone, (I use PC), all that's necessary is to 'Right-Click' on the image, select "make my image smaller', and send it. That way you still retain the option of using the largest image size, and still sending a smaller one to your email friends. Best of both worlds. I don't know if there is such an option on a Mac, but I suspect we'll soon here from a "Macster" soon about it. Good Luck.
quote=bgcokeonut I have a Nikon S8200 and love it... (show quote)

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