Right now, because these images are often of significant sizes (in both width and height), I have been using resizing them in the <img> tag so that they will fit into my blog template (the {} are just variable names):

<img src="{my_image_url}" width="{resized_width}" height="{resized_height}"

instead of:

<img src="{my_image_url}" width="{true_width}" height="{true_height}"

My question is:

If I allow Google Images to index these images (right now, the Google bot is blocked from indexing them), what dimension/pixel sizes will Google be indexing? Will Google index the images to be the original sizes or the resized sizes?

I ask because Google prioritizes images by size, so that the "larger" size images are prioritized over "smaller" size images. Obviously, I am at a disadvantage if my images are indexed with the smaller "resized" width and height instead of the larger "original" width and height.

Anyone have the same experience with this dilemma? What about Bing and Yahoo searches? Do they handle indexing the same as Google with respect to the sizes of images?

[edited by: tedster at 3:05 pm (utc) on Dec. 23, 2009]