pySSTV/pysstv/grayscale.py

43 wiersze
957 B
Python
Czysty Zwykły widok Historia

#!/usr/bin/env python
from __future__ import division
from pysstv.sstv import SSTV, byte_to_freq
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class GrayscaleSSTV(SSTV):
def on_init(self):
self.pixels = self.image.convert('LA').load()
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def gen_image_tuples(self):
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for line in xrange(self.HEIGHT):
for item in self.horizontal_sync():
yield item
for item in self.encode_line(line):
yield item
def encode_line(self, line):
msec_pixel = self.SCAN / self.WIDTH
image = self.pixels
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for col in xrange(self.WIDTH):
pixel = image[col, line]
freq_pixel = byte_to_freq(pixel[0])
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yield freq_pixel, msec_pixel
class Robot8BW(GrayscaleSSTV):
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VIS_CODE = 0x02
WIDTH = 160
HEIGHT = 120
SYNC = 7
SCAN = 60
class Robot24BW(GrayscaleSSTV):
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VIS_CODE = 0x0A
WIDTH = 320
HEIGHT = 240
SYNC = 7
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SCAN = 93
MODES = (Robot8BW, Robot24BW)