本文整理匯總了Python中cpngfilters.undo_filter_sub方法的典型用法代碼示例。如果您正苦於以下問題:Python cpngfilters.undo_filter_sub方法的具體用法?Python cpngfilters.undo_filter_sub怎麽用?Python cpngfilters.undo_filter_sub使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類cpngfilters
的用法示例。
在下文中一共展示了cpngfilters.undo_filter_sub方法的1個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: undo_filter_sub
# 需要導入模塊: import cpngfilters [as 別名]
# 或者: from cpngfilters import undo_filter_sub [as 別名]
def undo_filter_sub(filter_unit, scanline, previous, result):
"""Undo sub filter."""
ai = 0
# Loops starts at index fu. Observe that the initial part
# of the result is already filled in correctly with
# scanline.
for i in range(filter_unit, len(result)):
x = scanline[i]
a = result[ai]
result[i] = (x + a) & 0xff
ai += 1