Sea Wolf":3dotv2jz said:
Next question:
Do you have any control over the size (dimensions) of the embedded photo? Some appear to be much larger than others.
Is it the size of the file in bytes, or is there some other way to spelling out the desired dimensions?
Joe.
Joe,
Short answer - there are actually two copies of the image to which you can link - the thumbnail version and the bigger one. If you ctrl-click on the thumb nail and copy its image location/image link, you'll get a link to that one. If you instead click on the thumb nail to bring up the larger image and then ctrl-click and select the link to that image, you'll get the larger one.
Longer answer - In addition to the above info you also have control over the image size at loading and afterwards through re-sizing.
The image size is not determine so much by the file size but rather by the number of pixels in each dimension. You can find out the size of the image by ctrl-clicking on it and selecting properties. In general, bigger images have bigger file sizes but this isn't always true as the images are typically stored in a compressed format.
Image compression makes the file size of an image smaller. There are a large number of different ways to do image compression but essentially they all take advantage of a few ideas:
1) Your eye can only discriminate between so many different shades of a color so some shades can be replaced with others
2) Similar to one + you'll be happy with fewer than you can discriminate between and
3) If the image has large regions of similar colors, that information can be represented more efficiently. E.g. rather than storing the same (or similar) numbers for every pixel, one can store "this region is this color" in a few numbers.
When you upload an image it will typically be automatically re-sized based on preferences set in your photo album. You can turn off or even modify those preferences but I wouldn't recommend it. The defaults are to re-size uploaded images to 640 pixels in the long dimension and to create thumbnails that are 150 pixels in the long dimension. Those values work well for most everyone and are a nice compromise between having good looking images and be able to download them at a reasonable rate over the net (not everyone has a high speed connection). Also after an image is uploaded, you can re-size it later using the resize menu item within your album. If you make an image smaller, it will usually look OK, it you make it larger it may look OK depending on the image and the size factor change. If you upload a small image, when it gets re-sized to a large size the "new" pixel values are guessed from the old ones and the image doesn't look as good as if you had the larger image originally.
Finally, you can modify the images in a number of ways (including size) on your own computer using a variety of different software packages. On the mac the most popular ones are "graphic converter" and "photoshop lite". The former one comes with some versions of the operating systems and photshop lite comes with some cameras and scanners.
Roger on the SeaDNA