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Diffstat (limited to 'Imaging/selftest.py')
| -rw-r--r-- | Imaging/selftest.py | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/Imaging/selftest.py b/Imaging/selftest.py new file mode 100644 index 0000000..6242ba5 --- /dev/null +++ b/Imaging/selftest.py @@ -0,0 +1,161 @@ +# $Id: selftest.py 2813 2006-10-07 10:11:35Z fredrik $ +# minimal sanity check + +import sys +sys.path.insert(0, ".") +sys.path.insert(1, "PIL") + +import Image +import ImageDraw +import ImageFilter +import ImageMath + +try: + Image.core.ping +except ImportError, v: + print "***", v + sys.exit() +except AttributeError: + pass + +def _info(im): + im.load() + return im.format, im.mode, im.size + +def testimage(): + """ + PIL lets you create in-memory images with various pixel types: + + >>> im = Image.new("1", (128, 128)) # monochrome + >>> _info(im) + (None, '1', (128, 128)) + >>> _info(Image.new("L", (128, 128))) # grayscale (luminance) + (None, 'L', (128, 128)) + >>> _info(Image.new("P", (128, 128))) # palette + (None, 'P', (128, 128)) + >>> _info(Image.new("RGB", (128, 128))) # truecolor + (None, 'RGB', (128, 128)) + >>> _info(Image.new("I", (128, 128))) # 32-bit integer + (None, 'I', (128, 128)) + >>> _info(Image.new("F", (128, 128))) # 32-bit floating point + (None, 'F', (128, 128)) + + Or open existing files: + + >>> im = Image.open("Images/lena.gif") + >>> _info(im) + ('GIF', 'P', (128, 128)) + >>> _info(Image.open("Images/lena.ppm")) + ('PPM', 'RGB', (128, 128)) + >>> _info(Image.open("Images/lena.jpg")) + ('JPEG', 'RGB', (128, 128)) + + PIL doesn't actually load the image data until it's needed, + or you call the "load" method: + + >>> im = Image.open("Images/lena.ppm") + >>> print im.im # internal image attribute + None + >>> a = im.load() + >>> type(im.im) + <type 'ImagingCore'> + + You can apply many different operations on images. Most + operations return a new image: + + >>> im = Image.open("Images/lena.ppm") + >>> _info(im.convert("L")) + (None, 'L', (128, 128)) + >>> _info(im.copy()) + (None, 'RGB', (128, 128)) + >>> _info(im.crop((32, 32, 96, 96))) + (None, 'RGB', (64, 64)) + >>> _info(im.filter(ImageFilter.BLUR)) + (None, 'RGB', (128, 128)) + >>> im.getbands() + ('R', 'G', 'B') + >>> im.getbbox() + (0, 0, 128, 128) + >>> len(im.getdata()) + 16384 + >>> im.getextrema() + ((61, 255), (26, 234), (44, 223)) + >>> im.getpixel((0, 0)) + (223, 162, 133) + >>> len(im.getprojection()) + 2 + >>> len(im.histogram()) + 768 + >>> _info(im.point(range(256)*3)) + (None, 'RGB', (128, 128)) + >>> _info(im.resize((64, 64))) + (None, 'RGB', (64, 64)) + >>> _info(im.rotate(45)) + (None, 'RGB', (128, 128)) + >>> map(_info, im.split()) + [(None, 'L', (128, 128)), (None, 'L', (128, 128)), (None, 'L', (128, 128))] + >>> len(im.convert("1").tobitmap()) + 10456 + >>> len(im.tostring()) + 49152 + >>> _info(im.transform((512, 512), Image.AFFINE, (1,0,0,0,1,0))) + (None, 'RGB', (512, 512)) + >>> _info(im.transform((512, 512), Image.EXTENT, (32,32,96,96))) + (None, 'RGB', (512, 512)) + + The ImageDraw module lets you draw stuff in raster images: + + >>> im = Image.new("L", (128, 128), 64) + >>> d = ImageDraw.ImageDraw(im) + >>> d.line((0, 0, 128, 128), fill=128) + >>> d.line((0, 128, 128, 0), fill=128) + >>> im.getextrema() + (64, 128) + + In 1.1.4, you can specify colors in a number of ways: + + >>> xy = 0, 0, 128, 128 + >>> im = Image.new("RGB", (128, 128), 0) + >>> d = ImageDraw.ImageDraw(im) + >>> d.rectangle(xy, "#f00") + >>> im.getpixel((0, 0)) + (255, 0, 0) + >>> d.rectangle(xy, "#ff0000") + >>> im.getpixel((0, 0)) + (255, 0, 0) + >>> d.rectangle(xy, "rgb(255,0,0)") + >>> im.getpixel((0, 0)) + (255, 0, 0) + >>> d.rectangle(xy, "rgb(100%,0%,0%)") + >>> im.getpixel((0, 0)) + (255, 0, 0) + >>> d.rectangle(xy, "hsl(0, 100%, 50%)") + >>> im.getpixel((0, 0)) + (255, 0, 0) + >>> d.rectangle(xy, "red") + >>> im.getpixel((0, 0)) + (255, 0, 0) + + In 1.1.6, you can use the ImageMath module to do image + calculations. + + >>> im = ImageMath.eval("float(im + 20)", im=im.convert("L")) + >>> im.mode, im.size + ('F', (128, 128)) + + PIL can do many other things, but I'll leave that for another + day. If you're curious, check the handbook, available from: + + http://www.pythonware.com + + Cheers /F + """ + +if __name__ == "__main__": + # use doctest to make sure the test program behaves as documented! + import doctest, selftest + status = doctest.testmod(selftest) + if status[0]: + print "*** %s tests of %d failed." % status + else: + print "%s tests passed." % status[1] |