On Aug 5, 3:44 pm, News123 <news...@free.fr> wrote: > You didn't really tell us why you need one big file, which contains more > pixel, than you can probably store in RAM >
In fact I do not need such a big image. I just want to know the solution. > Is it for printing? > Not knwoing your goal makes it difficult to suggest solutions. > > Can't you use other image formats like raw RGB or > What other image formats are supported? > tiff? Raw? PPM (http://en.wikipedia.org/wiki/Portable_pixmap)? > I want to view image use Windows Pic View. I don't familiar with PPM， photoshop don't support PPM, does PIL support this format? > concatenating raw/ppm files with the same width would be really trivial. > > so you could use python to create horizontal raw/ppm stripes. > > then you could concatenate them without having to have the whole image > in RAM. > > Perhaps there's even converters from ppm to png, that don't need the > whole image in RAM. > > > > cocobear wrote: > > On Aug 4, 3:24 pm, News123 <news...@free.fr> wrote: > >> Hi, > > >> cocobear wrote: > >>>>>>> Map = Image.new("RGB", (x,y)) > >>>>>>> Map.paste(im, box) > >>>>>>> Map.paste(im1,box) > >>>>>>> Map = Map.convert("L", optimize=True, palette=Image.ADAPTIVE) > >>>>>>> But if thetwopngpicis too big , or if I have tomergemorepic > >>>>>>> together, I will get MemoryError: > >>>>>>>>>>>>> Image.new("RGB",(44544,38656)) > >>>> What do you want to do with such a big image? You will run into the same > >>>> limitation when you are trying to display it. > >>> I want to download a map from google map with high precision > >> For me it sounds strange to handle such big files. > > >> Is the map you download from Google really that big? > >> Mostly Google maps uses normally tiles of sizes 256x256 pixel, wich you > >> have to compose to get the big image. > > > The map I downloaded from Google is small(256x256). These small maps > > will compose a big image. > > >> If your problem is to combine tiles with different palettes, then you > >> should pobably look at a way to 'unify' the palette of all tiles befor > >> combining them. > > > I think it is impossible to 'unify' all this tiles. > > >> Being no expert of PIL I don't know whether this is easily possible though? > > >> bye > > >> N -- http://mail.python.org/mailman/listinfo/python-list
