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Could someone show me and explain resolution? I do a lot of photography for fun and I like to adjust my images in photoshop, but I don't think I actually get the resolution thing. I mean like to email to a photo printing lab and have the photos printed. I hope someone understands what I mean. Thanks in advance.
resolution is about the amount of dots or pixels there are per square inch of image,the less dpi there is the less quality there will be and obviously the more there are the better or higher quality the image is.
now with photos that are being sent over web im assuming thats what you mean cuz an entire "photo printing lab" isnt physiclly possible [confused]
now are you just sending straight forward snap shots,and resizing them in ps or are you doing some creative things with photoshop?
i am kinda hoping you can more specific about what it is your doing in Ps so i can understand more about the actual file format your saving in.
and are you sending the images as they are or incorperating the in any kinda website or photo gallery cuz thee are many different formats you can save the images in and normally im the kinda person who thinks more about file size which means i have to think about having a low resolution.
example: web based images that you would use for web pages are always 72 dpi.
images like scanned photos .TIFF files can vary but to keep a good quality
to a regular photo (if you wanted to print the image out) would be beween 100 to 300 dpi.
but bear in mind that the higher the dpi the larger the file size so unless your freinds have high speed it could take a while for them to get them all through.
reply to this please explaining a bit more about how your doing these adjustments and what you want from this and ill be able to explain more ok [righton]
EDIT: or just put in a search in Google -----> "what is image resolution?" [righton]
Sorry, but this is not true. Please do a search on this forum as I cannot go on repeating and repeating this:
Images are remembered by comps as bitmaps. A bitmap is a kind of mosaic, and every building block is called a pixel. What a puter remembers for every pixel is, amongst other data, the amount of each colour and its place in the mosaic.
A pixel has no fixed dimensions. Your operating system, with the help of your graphics card decides how many pixels you can see on your monitor. For example 640x480, 800x600, 1280x960 etc. If you have, say 800x600, you will not be able to see an image of 801 pixels wide without scrolling horizontally. But ANY image that is 799 pixels wide, will be fully visible. Whether there are 72 pixels in an inch or 1254.
Then why are there so many people who still write in books that you need 72 pixels per inch for the web? Because they all copy one-another. The origin of this 72 can be found in the world of print. When DPI (desktop publishing) started, professional printers were rather reluctant because their trade is several centuries old, and they were used to their own way of measuring things. And they worked with a system of points as units. (In Photoshop, you can still choose under preferences whether you want to use the old system, or the simplified one (exactly 72 dots in an inch). This is only used for printing, never for the web. The sole intention is that you see on the monitor approximately the same size as what will be printed.
To summarize:
If you have, say, and image of 360x720 pixels, you can see it without scrolling on your monitor if the monitor can display 360x720 pixels or more.
When it is set at 72dpi or ppi, its printed size will be 5x10 inch, which will approximately be the size you see it on the monitor.
When it is set at 144dpi or ppi, its printed size will be 2,5x5 inch, or only one quarter of what you see on a monitor.
So if you want to annoy people, or prevent most downloaders to print your web images, set them at 720dpi or ppi or even more. The printed result will be less than a thumbnail. Only those who know, and have the app (like PS) can do something about this.
[righton] Okay, here goes, this is what I normally do with ps. I usually the photos I have taken on CD and they are usually at 72 dpi. I usually bump the resolution up to about 300. Maybe do some work on skin tones, backgrounds ect. I use the clone tool to take out some of the background and get rid of shadows. Sometimes I replace the entire background. When I get the photo the way I want it then I save it as a JEPG and email it to my photo processing place and they print the photos with what they call an OSOFF printer [confused] ??? I am not sure exactly what the OSOFF printer stands for but they come out an 8x12 instead of an 8x10. Usually my pictures are grainy. Not terrible, but grainy. I also don't really understand the "resample" thing either. I am relitively new to ps but am trying to learn. when I replace the background on some of the photos, the background is not as grainy as the image or the people in the image. So maybe I should just scan in the photo instead of pulling it off the CD??? If so I have always learned to scan at the regular resolution that the scanner is set and up the resolution in the ps program. Is this correct???? Thank you
What camera do you use? This can well be the cause of graininess.
Resizing means changing the size.
Resampling means telling PS that it needs to add/delete pixels. This is quite a calculation. Best is to do this in steps, and never to choose a simple size, like 50% (allowing PS to discard one out of two).
... I like that ... will try it ... I can imagine their frustration [bustagut] [bustagut] ... thanks Blinky ... I had to get some film processed and burnt onto a cd (to save me having to scan them all) a few months back ... not knowing anything about it I asked the film processor what resolution I would have when my computer read the cd and was told 72dpi. I asked if I could have a higher resolution and was told yes, but I had to specify or I would always get 72dpi ... I asked for 300dpi and bmp (just a figure I picked, no reason) which was fortunate 'cos later some folk wanted big prints of the originals .... hope this info helps
btw .. film processors 'standard' was jpg that's why I asked for the better bmp format
Resolution???? 
Linear Mode
