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optimized pixel access with explicit load()

ironpython
András Veres-Szentkirályi 2013-07-01 16:20:19 +02:00
rodzic 75292e2bee
commit 1a469c43d5
2 zmienionych plików z 4 dodań i 4 usunięć
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4
pysstv/color.py
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@ -11,12 +11,12 @@ class ColorSSTV(GrayscaleSSTV):
def encode_line(self, line): def encode_line(self, line):
cs = self.COLOR_SEQ cs = self.COLOR_SEQ
msec_pixel = self.SCAN / self.WIDTH msec_pixel = self.SCAN / self.WIDTH
image = self.image image = self.image.load()
for index in cs: for index in cs:
for item in self.before_channel(index): for item in self.before_channel(index):
yield item yield item
for col in xrange(self.WIDTH): for col in xrange(self.WIDTH):
pixel = image.getpixel((col, line)) pixel = image[col, line]
freq_pixel = byte_to_freq(pixel[index]) freq_pixel = byte_to_freq(pixel[index])
yield freq_pixel, msec_pixel yield freq_pixel, msec_pixel
for item in self.after_channel(index): for item in self.after_channel(index):

4
pysstv/grayscale.py
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@ -15,9 +15,9 @@ 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 image = self.image.load()
for col in xrange(self.WIDTH): for col in xrange(self.WIDTH):
pixel = image.getpixel((col, line)) pixel = image[col, line]
freq_pixel = byte_to_freq(sum(pixel) / len(pixel)) freq_pixel = byte_to_freq(sum(pixel) / len(pixel))
yield freq_pixel, msec_pixel yield freq_pixel, msec_pixel