jerry_diakiw Posted November 7, 2011 Share Posted November 7, 2011 <p>I am presenting to the lions club this sat and projecting my images of my backpacking trip from capetown to cairo overland ( i'm 74)and about my kidnapping and cut throat in tanzamia by a somali gang and my escape<br> but my life or death question now is what is the best image size for my pics.<br> Right now they are about 4.56 MB 3888 x 2592 what should i resize them ? is it necessary?<br> also i have a few in web size i sent on route at 46kb but orignials were stolen are they projectable on a public screenscreen 9' x 9'?<br> (If you want to read my toronto star story just google "I'm 74 and I backpacked across africa" it will pop up on dozens of sites. Email me if you wan t the kidnappinhg story)</p> <p>jerry</p> Link to comment Share on other sites More sharing options...
patricklavoie Posted November 7, 2011 Share Posted November 7, 2011 you can leave them at the size you have, or make them fit to a know standard size according to there specification (like 1024x768 for example) happy that you are alive to talk about ; ) Link to comment Share on other sites More sharing options...
Lou_Meluso Posted November 7, 2011 Share Posted November 7, 2011 <p>A lot depends on the projector used. Find out what type it is and look up it's maximum resolution. It may not be needed to re-size the images but the projector will only project it's max resolution and, depending on how many images in your show and software used, big files could bog down the slideshow software/hardware. Having the show on the hard disk will be helpful as opposed to running it from an optical disk. On a high end projector, 1200-1600 pixels on the long axis should get you there. On small projectors, 600-800 pixels might be enough. Or pick a mid-value if the equipment is unknown. Images that are somewhat less than max hardware resolution will still project a decent image.</p> Link to comment Share on other sites More sharing options...
jerry_diakiw Posted November 7, 2011 Author Share Posted November 7, 2011 Thanks. Very helpful. What about my images that are only one in 46 -120 kb for email. And masters gone. . Can I resize them to 1024x752 and get away with it? Jerry Link to comment Share on other sites More sharing options...
Charles_Webster Posted November 7, 2011 Share Posted November 7, 2011 <p>jerry</p> <p>How big will you be projecting the images? And how close will the audience be? It's all going to depend on the pixel size, the amount of compression, and the subject matter.</p> <p>The best you can do is to borrow a suitable projector and make some tests.</p> <p><Chas></p> Link to comment Share on other sites More sharing options...
jerry_diakiw Posted November 7, 2011 Author Share Posted November 7, 2011 Totally confused now . If I have an image reading 4.56 mb 3888x 2592. Shot with a canon rebel I want to project to an audience of 80. With a screen size of about 10' x 10' with a standard hotel digital projector used for conference sessions . Can I make a good bet and resize 1024x 762? If I di that total goes down to 600 - 700 kb. I am doing something wrong! Time is running out and I am getting up tight about what I should canna alk these images too. I am showing them quite fast so I don't l Need slow loading problems Link to comment Share on other sites More sharing options...
jcuknz Posted November 8, 2011 Share Posted November 8, 2011 <p>No ... since I would expect files prepared for showing to be around 300Kb ... thats at 1400x1050 or 1400x 933 for DSLR files ... but that is using a top line projector I gather at Club.<br> Those web files with lost masters .. I suggest you interpolate up to the 1024x762 and see what they look like .. they could be quite reasonable particularly when projected with the audience a reasonable distance back from the screen, at least those at the back will not notice any problem probably :-)<br> You say the file size are 46<120 but the important question is to what resolution did you resize them? I would normally send 700 wide images to fit or almost fit freinds monitors so interpolating up to 1024 is not that much.</p> Link to comment Share on other sites More sharing options...
jcuknz Posted November 8, 2011 Share Posted November 8, 2011 <p>The 10x10 screen size doesn't really come into it but more to the point is how close will the audience be ... pretty much the same as looking at a print at a reasonable distance and pixel peeping. or looking at a billboard close-up ... looks horrible but from across the street its great. Basically we are dealing with .... when we project but we have to live with the current state of the art, and becuase usually the audience is some way back we get away with it.</p> Link to comment Share on other sites More sharing options...
jim_jones3 Posted November 8, 2011 Share Posted November 8, 2011 <p>File size is not the most important consideration in a good presentation. Decades ago, when China was mostly closed to Americans, an American doctor's wife took extensive photos in China with a 110 camera. The slides were projected onto a fairly large screen. Of course the photos were awfully grainy and unsharp, but aside from that, they were well composed, well exposed, and accompanied by an informative and entertaining talk. It was a fine presentation. Sharp and technically perfect images with no content and presented with dull words would have compared poorly with that show. If 46kb images are important to your presentation, use them. Perhaps brief mention of the necessity of showing them will add to the talk. Only if you do the same show for a camera club, editing for image quality rather than for the complete story might be better.</p> Link to comment Share on other sites More sharing options...
jerry_diakiw Posted November 8, 2011 Author Share Posted November 8, 2011 <p> i guess i am having trouble woith the math. if i take a 5mb image that is 3888x 2592 and resize it to 1024 x 768<br> my 5mb suddenly becomes 195 kb! is that not a huge loss in quality? I am best to resize to 1024 x 768 or resize by 50% which give me a larger file size than at 1024 resizing.<br> I guess i am searching for the optimum quality image while not restricting speed of image change or reloading .<br> is a 1024 x 768 image 0f 195 kb good enough?</p> Link to comment Share on other sites More sharing options...
kim_johnson1 Posted November 8, 2011 Share Posted November 8, 2011 <p>You need to find the resolution of the projection .. 1024 or 1280 should be enough.</p> Link to comment Share on other sites More sharing options...
tholte Posted November 8, 2011 Share Posted November 8, 2011 <p>Good luck with the slide show! When you get a chance, post some of the images here on PN, would really like to see them.</p> Link to comment Share on other sites More sharing options...
dan_meyers1 Posted November 8, 2011 Share Posted November 8, 2011 <p>Jerry,</p> <p>How are you re-sizing the files? Resampling a file is what changes the file size in mb and kb, it permanently alters the original pixels.<br> Are you using software that allows you to control the resampling method?</p> Link to comment Share on other sites More sharing options...
jerry_diakiw Posted November 8, 2011 Author Share Posted November 8, 2011 Dan I am just using a program inside Microsoft viewr which gives me the option of four sizes largest being 1024x768 Or a percentage reduction . Do I need to be careful about entire file size at 1024 x 768? Jerry Link to comment Share on other sites More sharing options...
dan_meyers1 Posted November 9, 2011 Share Posted November 9, 2011 <p>Jerry,</p> <p>The pixel dimensions 1024 x 768 are fine. I'm not familiar with Microsoft Viewer but I suspect it is not very sophisticated in how it resizes, although it probably is fine for your projection needs. The best option, as suggested by others, is to do a dry run with both your largest and smallest files to see the actual results. If that's not possible, I personally would opt for projecting the larger images off a harddrive because I'd be very disappointed seeing too much pixelation in my images. But either way, your story sounds so compelling that most likely no one watching will have noticed any small image flaws.</p> <p>Good luck!</p> <p> </p> Link to comment Share on other sites More sharing options...
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