<pre>>- on initial load of a raster, generate a quicklook that is the larger
>of 1/4 screen resolution or 500x500 pixels by sampling every nth pixel
>- generate a histogram from the quicklook
>- calculate clipped 2% - 96% range min max for each band
>- apply a histogram stretch based on the above
>- the histogram could be used for generating the graph in raster
>props, and the quicklook could be used to create thumbs and previews
>etc
>- ideally we should cache these quicklooks and only regenerate them if
>the underlying dataset has changed
>
>I believe if we do this we will have fast initial load and the images
>(grayscale and rgb) will 'look right' when first loaded (i.e with good
>contrast) and it would not be necessary to assign any color value to
>grayscales by default.
>
>Regards</pre>Hi,<br>just my 2 ct.<br><br>I guess the more important capability with raster is to open they faster possible.<br><br>I fear calculate all these values on first opened take more time than what is waitable for the open of a raster.<br>
<br>Perhaps this action should be choosable by settings ?<br><br>Of course I see our situation.<br><br>Our situation is of more sets of raster (7-800 each set) where every raster is grey level or true color of 3-400 Mbyte each.<br>
And all these raster are accessible by a remote shared server to our users.<br>For a total, actually, of about 13.000 rasters.<br><br>I don't understand if this new feature could be really usable in a situation like our.<br>
<br>-- <br>-----------------<br>Andrea Peri<br>. . . . . . . . . <br>qwerty אטלעש<br>-----------------<br><br>