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png08rebayer.py
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png08rebayer.py
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# 趣味のPython学習 Project 02-02
# Python PNG08 REBAYER
# ばーじょん 1.0.5
ver = "1.0.5"
from io import BytesIO
from PIL import Image
from PIL import ImageFile
def rdd(img,x,y) :
if x < 0 :
return (0,0,0)
if y < 0 :
return (0,0,0)
if x >= img.size[0] :
return (0,0,0)
if y >= img.size[1] :
return (0,0,0)
return img.getpixel((x,y))
def rebayer00RGGB(img,x,y) :
rgb = rdd(img,x,y)
dt11 = (rgb[0]+rgb[1]+rgb[2]) // 3
return (dt11,dt11,dt11,dt11)
def rebayer2x2RGGB(img,x,y) :
rgb = rdd(img,x,y)
return (rgb[0],rgb[1],rgb[1],rgb[2])
def rebayer2x2RGGBdel(img,x,y) :
rgb = rdd(img,x+0,y+0)
if x%2==0 and y%2==0 :
return (rgb[0])
if x%2==0 and y%2==1 :
return (rgb[1])
if x%2==1 and y%2==0 :
return (rgb[1])
if x%2==1 and y%2==1 :
return (rgb[2])
return (0)
def rebayer2x2RGGBrev(img,x,y) :
red = 0
grn = 0
blu = 0
for dy in (0,1) :
for dx in (0,1) :
rgb = rdd(img,x//2*2+dx,y//2*2+dy)
red = red + rgb[0]
grn = grn + rgb[1]
blu = blu + rgb[2]
ct = 4
if x%2==0 and y%2==0 :
return (red//ct)
if x%2==0 and y%2==1 :
return (grn//ct)
if x%2==1 and y%2==0 :
return (grn//ct)
if x%2==1 and y%2==1 :
return (blu//ct)
return (0)
def rebayer3x3RGGBrev(img,x,y) :
red = 0
grn = 0
blu = 0
for dy in (-1,0,1) :
for dx in (-1,0,1) :
rgb = rdd(img,x+dx,y+dy)
red = red + rgb[0]
grn = grn + rgb[1]
blu = blu + rgb[2]
ct = 9
if x == 0 or x == img.size[0] - 1 :
ct = ct - 3
if y == 0 or y == img.size[1] - 1 :
ct = ct - 3
if ct < 4 :
ct = 4
if x%2==0 and y%2==0 :
return (red//ct)
if x%2==0 and y%2==1 :
return (grn//ct)
if x%2==1 and y%2==0 :
return (grn//ct)
if x%2==1 and y%2==1 :
return (blu//ct)
return (0)
print(f"*** REBAYER PROGRAM VERSION:{ver} ***")
print("\nSELECT COLOR FILE\n")
while len( fnm := input("file : ") ) > 0 :
try :
img_src = Image.open(fnm,'r')
img_src.verify()
except FileNotFoundError:
print(f"{fnm} : not found !")
except PIL.UnidentifiedImageError:
print(f"{fnm} : type error !")
else :
print(f"{fnm} : read OK !")
wd = img_src.size[0]
ht = img_src.size[1]
md = img_src.mode
print(f"W:{wd} H:{ht} M:{md}")
if md != "RGB" and md != "RGBA" :
print(f"{fnm} : not color file.")
continue
print("*** CONVERT MODE ***")
print("1: RGGB 1x1 ")
print("2: RGGB 2x2 ")
print("3: RGGB 3x3 ")
while True :
try :
md = int(input("MODE :"))
if 1 <= md and md <= 3 :
break
except ValueError :
continue
# RE OPEN AS A BINARY
with open(fnm,'rb') as f :
data = f.read()
img_src = Image.open(BytesIO(data))
# CONVERT DATA
img_cv = Image.new('L',(wd,ht))
for y in range(img_src.size[1]) :
for x in range(img_src.size[0]) :
if md == 1:
bb = rebayer2x2RGGBdel(img_src,x,y)
img_cv.putpixel((x+0,y+0),bb)
if md == 2:
bb = rebayer2x2RGGBrev(img_src,x,y)
img_cv.putpixel((x+0,y+0),bb)
if md == 3:
bb = rebayer3x3RGGBrev(img_src,x,y)
img_cv.putpixel((x+0,y+0),bb)
fno = fnm + ".rebayered-" + str(md) + ".png"
print(f"WRITE OUT : {fno}")
img_cv.save(fno)
print("*** DONE ***")
#END OF FILE