Python Imaging Library Overview
|March12,2002|FredrikLundh, ,anefficientinternalrepresentation, ' ,convertbetweenfileformats,printimages, , ,youcanuseJackJansen' ,there' ,includingpointoperations,filteringwitha setofbuilt-inconvolutionkernels, , ' , , ;eitherbyloadingimagesfromfiles,processi ngotherimages, ,usetheopenfunctionintheImagemodule.>>> import Image>>> im = (" ")Ifsuccessful, >>> print , , (512, 512) , (inpixels).Themodeattributedefinesthenum berandnamesofthebandsintheimage, "L"(luminance)forgreyscaleimages,"RGB"fo rtruecolourimages,and"CMYK" , , ,let'sdisplaytheimagewejustloaded: >>> ()(Thestandardversionofshowisnotveryeffi cient, 'thavexvinstalled,itwon' ,itisveryhandyfordebuggingandtests.) , ' , , , :ConvertfilestoJPEGimport os, sysimport Imagefor infile in [1:]: outfile = (infile)[0] + ".jpg" if infile != outfile: try: (infile).save(outfile) except IOError: print "cannot convert", ,youmustalwaysspecifytheformatthisway:Ex ample:CreateJPEGThumbnailsimport os, sysimport Imagefor infile in [1:]: outfile = (infile)[0] + ".
box = (100, 100, 400, 400) region = im.crop(box) The region is defined by a 4-tuple, where coordinates are (left, upper, right, lower). The Python Imaging Library uses a …
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