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cache pixel tuple length

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András Veres-Szentkirályi 2013-07-01 23:24:26 +02:00
parent f0a2076a68
commit 899ffe8e9b
1 changed files with 2 additions and 1 deletions
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3
pysstv/grayscale.py
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@ -16,9 +16,10 @@ class GrayscaleSSTV(SSTV):
def encode_line(self, line): def encode_line(self, line):
msec_pixel = self.SCAN / self.WIDTH msec_pixel = self.SCAN / self.WIDTH
image = self.image.load() image = self.image.load()
pixlen = len(image[0, line])
for col in xrange(self.WIDTH): for col in xrange(self.WIDTH):
pixel = image[col, line] pixel = image[col, line]
freq_pixel = byte_to_freq(sum(pixel) / len(pixel)) freq_pixel = byte_to_freq(sum(pixel) / pixlen)
yield freq_pixel, msec_pixel yield freq_pixel, msec_pixel