Python seconds_to_evの例

コード例 #1

ファイル: expgen.py プロジェクト: amcameron/expgen

def synthesize(exp, luck, focal):
    logger.debug('synthesizing. target EV: {}'.format(exp))
    # TODO: use bounds during synthesis so we can't generate invalid values.
    random.seed()
    evFocal = exposure.seconds_to_ev('1/' + focal + 's')
    evShutter = evFocal + random.uniform(
            -LUCK_SCALE_FACTOR*luck, LUCK_SCALE_FACTOR*luck)
    evTarget = exp + random.uniform(
            -LUCK_SCALE_FACTOR*luck, LUCK_SCALE_FACTOR*luck)
    # evTarget = evShutter + evAperture + evIso
    # evTarget - evShutter = evAperture + evIso
    remainder = evTarget - evShutter
    isoLower = max(MIN_ISO, remainder - MAX_APERTURE)
    isoUpper = min(MAX_ISO, remainder - MIN_APERTURE)
    evIso = random.uniform(isoLower, isoUpper)
    evAperture = evTarget - evIso - evShutter
    logger.debug('values synthesized: {}'.format(
        exposure.evs_to_exposure(evShutter, evAperture, evIso)))
    return evShutter, evAperture, evIso

コード例 #2

ファイル: expgen.py プロジェクト: amcameron/expgen

#!/usr/bin/env python
import logging
from optparse import OptionParser
import random
import exposure
logger = logging.getLogger(__name__)

LUCK_SCALE_FACTOR = 2
MIN_ISO = exposure.iso_to_ev('1600 ISO')
MAX_ISO = exposure.iso_to_ev('100 ISO')
MIN_APERTURE = exposure.fnumber_to_ev('f/1.4')
MAX_APERTURE = exposure.fnumber_to_ev('f/22.0')
MIN_SHUTTER = exposure.seconds_to_ev('1/10 s')
MAX_SHUTTER = exposure.seconds_to_ev('1/2000 s')
MIN_EXPOSURE = MIN_SHUTTER + MIN_APERTURE + MIN_ISO
MAX_EXPOSURE = exposure.SUNNY

def synthesize(exp, luck, focal):
    logger.debug('synthesizing. target EV: {}'.format(exp))
    # TODO: use bounds during synthesis so we can't generate invalid values.
    random.seed()
    evFocal = exposure.seconds_to_ev('1/' + focal + 's')
    evShutter = evFocal + random.uniform(
            -LUCK_SCALE_FACTOR*luck, LUCK_SCALE_FACTOR*luck)
    evTarget = exp + random.uniform(
            -LUCK_SCALE_FACTOR*luck, LUCK_SCALE_FACTOR*luck)
    # evTarget = evShutter + evAperture + evIso
    # evTarget - evShutter = evAperture + evIso
    remainder = evTarget - evShutter
    isoLower = max(MIN_ISO, remainder - MAX_APERTURE)
    isoUpper = min(MAX_ISO, remainder - MIN_APERTURE)