Quote:
Originally Posted by dre95060
Assuming the hi-res image is baked into the ebook in the first place, instead of blowing it up to screen size, add the option of blowing it up to 1:1 pixel-to-pixel size and add a pan feature.
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It isn't clear that there is a high res image in the ebook. We can't tell because they are in the obscure TOPAZ format. On almost every device except the Kindle, a MOBI file can associate a high res. image with the one normally displayed (web browsers do this all the time too). Note that it does not even need to be the same image. It could be a zoom of just part of the image for example. This option may already be available for TOPAZ, which would put the blame for lack of optimization mostly on the publisher. Even without this capability, it should be possible for publishers to implement a "zoom half the image" capability by actually displaying the original image in two halves. This would allow zoom to select the top or bottom of the image for zooming.
See the attached screenshots, from Apress's Beginning Ruby, which show that the zoom can be in portrait mode and also that the image quality is very much part of the problem.