layton Posted October 9, 2003 Posted October 9, 2003 what resolution should I scan a 3x4 photo, and likewise negative, and slides so I can present them on the big screen w/o the pixels showing? Quote
JoshK Posted October 10, 2003 Posted October 10, 2003 are you using a flatbed, photo or slide/negative scanner? If you are using a flatbed it's pretty much gonna suck ass no matter what. Quote
Thrashador Posted October 10, 2003 Posted October 10, 2003 michael_layton said: what resolution should I scan a 3x4 photo, and likewise negative, and slides so I can present them on the big screen w/o the pixels showing? Are you creating a slide or just a file for a powerpoint type presentation. If you're going to have a lab make a slide from a digital file better make that file a whopper. Say 50megs+ at 4000dpi. If it's just for a powerpoint presentation 150-300dpi should work at 8x10 file size. PM me if you would like some help. Quote
Figger_Eight Posted October 10, 2003 Posted October 10, 2003 72 dpi is fine if it's just going to digital output - just keep your image dimensions larger. Quote
layton Posted October 10, 2003 Author Posted October 10, 2003 I got confused pretty quick with the responses. I'll rephrase it being more specific. I am scanning actual physical slides, negs, and photos on a flatbed scanner with a transparancy/slide/neg adaptor (HP Scanjet 3970) into files that I will paste onto a powerpoint presentation which will then be shown on a lecture hall sized screen. What DPI should I use for each (or all). Flowchart: (photo,slide,neg)---(hp scanjet 3970)---(file)---(powerpoint)---(screen)---(audience)---(memory)---(obscurity or legend) Quote
Figger_Eight Posted October 10, 2003 Posted October 10, 2003 Computer monitors (digital projectors) max out at around 100 dpi, so scanning at a resolution higher than this is overkill. Pay attention to your image size (dimensions) because that's what will keep your images from getting "blocky". Quote
layton Posted October 10, 2003 Author Posted October 10, 2003 Figger_Eight said: Computer monitors (digital projectors) max out at around 100 dpi, so scanning at a resolution higher than this is overkill. Pay attention to your image size (dimensions) because that's what will keep your images from getting "blocky". So you are saying, don't "stretch" the image to fit the powerpoint slide borers? If that's what your saying, then wouldn't scanning at a higher dpi solve that problem? IF not, how can I enlarge the photos w/o stetching there borders so they fill out the screen? Quote
Figger_Eight Posted October 10, 2003 Posted October 10, 2003 If you have software that can resize the image (Photoshop) and retain the quality of the picture, that would work. Lower level image editing software will make it look crappy if you do it this way. If you don't have that - yeah...you have to scan it in at a higher dpi to get a bigger picture. Quote
Ursa_Eagle Posted October 10, 2003 Posted October 10, 2003 free resizing (and more) software... http://www.irfanview.com/ pics modified with this program look decent to me, but I was resizing to exactly half the original size (so it wasn't a hard conversion.) Quote
Thrashador Posted October 10, 2003 Posted October 10, 2003 Scan to the size of your powerpoint holes @ 72 dpi first. If you get artifacts, errrr pixelation, then 150 dpi will do the trick. If you're going to resize a file in Pshop a good rule is to never jpg a jpg. Start with a tiff instead. Quote
Jason_Martin Posted October 10, 2003 Posted October 10, 2003 When resizing photos with something like paint shop pro, what is the minimum KB count for the images to still look good? I'm in the process of putting together a slide show and all of the images are at least 6MB or more. This is way to big for my computer to deal with. How far should this be compressd? Thanks in advance. Jason Quote
Figger_Eight Posted October 10, 2003 Posted October 10, 2003 If you're already working with big pictures, reduce the image size to 800x600 and 72 dpi. This should get them to around 100k. Quote
Gary_Yngve Posted October 10, 2003 Posted October 10, 2003 Jason_Martin said: When resizing photos with something like paint shop pro, what is the minimum KB count for the images to still look good? I'm in the process of putting together a slide show and all of the images are at least 6MB or more. This is way to big for my computer to deal with. How far should this be compressd? Thanks in advance. Jason What does the filename for those pictures end in? If it's "tif" or "bmp", then the problem is that the images are not being compressed. With a high-quality "jpg" encoding, the sizes of the files are reduced by up to 90%, but the image quality is nearly equivalent. Quote
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