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Image Introduction
Image Basics
JPG ''Lossiness''
Picture ''Anatomy"
Color Models
Colors - More Facts
Image Tools
Image "Tweaks"
Animated Images
Resolution and DPI
Printing after
Digital Cameras
Binary and Hexadecimal
with Color
Picture Taking
Image ''Burden''
Image edits
Posting Pictures
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Photo Facts
Photo Facts - Diagrams

More, a partial overview -

A few general points, aimed mostly at people with prints and scanners, potential web sites that might host pictures and a brief mention of digital cameras. Much of this is dealt with in more detail in other pages.

Scanning general -

For the web, don't bother to scan at too high a resolution. 75 DPI will often suffice. Bear in mind though that overcompression of this resolution into a JPG file will quickly lose you edge definition. A scan at 200 DPI is about as far as you need go.

Keep image size to between 500 to 600 pixels across the max dimension if possible.... in this way you can finish up with a fairly fast loading file of between 40k to max 70k, with compression at about 15:1. It will look plenty large enough on screen. I would suggest 600 pixels as absolute max - to help avoid the need for horizontal scrolling when viewed on a forum page viewed at lower screen res'. If really needed, a higher resolution version could be offered for those who wish it, as a separate download.

Try and get the size right at scanning stage but, if you decide you want to crop or reduce image later, then scan higher at 150 to 200 DPI and compress the cropped/reduced pic fairly hard later (limit compression to 15:1, max 20:1 if possible to avoid excessive degradation).

If you have a monochrome image to scan or only require mono' ...... then scan as grayscale .. this will yield a smaller file straight away.

Scanning targets -

You will in most cases have to reduce size. If you can, do this at scanning stage. Also, only include the relevant area of shot holes, placing if you can a scale object or ..... write the size of the black center dimension, and shoot details.

Targets often come out as too dark and often ''muddy''. You may be able to increase contrast and brightness at scanning stage .... otherwise you may have software that will help you do this later.

For those who may not have anything on hand, a very good image viewer, with potential for making some simple adjustments is IRFANVIEW (freeware). This will allow you to make some corrections, hopefully enough to help. It is freeware and does not install itself heavily into your system.

One other small utility (freeware) you may also find very handy too, is ''JRuler'' ........ a very small stand-alone application which when run puts a simple ruler on your screen. With it you can measure image dimensions, window sizes etc. Well worth a look .... just unzip and run from where you want with a shortcut. htmL file included with usage suggestions.

Possible Free Hosting Sites -

Many people have a problem finding a place to host their images, for free....... and still be able to provide a ''hot link'' that will ''fetch'' them when needed into the board posts.

These have not all been fully verified for either availability or actually being free. Feedback here will be most helplful and over time we should be able to provide a fairly definitive list. Just let me know. .........(their site is a little hard to navigate?) for 1 MB of free space - unfortunately, they promote themselves on your pic!! - Was useful I believe. - This one gets used a lot it seems.

Quick printing rules -

If you want to print pics you have scanned, then a number of things need to be remembered.

Do not use an image resolution much more than one third of your printer's resolution - see page on scanning/printing matters and remember that the higher the resolution of your image, for a given pixel size, the SMALLER it will print! (75 DPI for a 300 DPI printer is fine).

If you are in doubt though when you start scanning an image, err on the large size and maybe save (temporarily) as a bitmap (BMP). This way you will have an original which has all attributes, but, it WILL be a large file. You can then play around with it and save it as a JPG when you have finished and are satisfied......... keeping a BMP copy though to ''try again'' if you mess up!

Once you have processed that BMP and achieved a suitable size for web or printing ..... you can pitch it.

Digital cameras -

If you want to use your digital camera instead of a scanner, or because you have no scanner, make sure you use best resolution ....... shoot at ''best'' or whatever the camera calls it. This is because you may not be able to get in close enough and will have to crop the ''bit you want'' later. That then can be downsized further if needed.

If you can, rest on something or use a tripod. The biggest enemy of still photography is ''camera shake'' and even a small amount will mar perceived sharpness. Always take more than one shot because invariably one is better than another.

Try and always shoot in good available light .... it gives better results than flash. Much more on this in the ''Picture Taking'' section.

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