174 lines
4.6 KiB
Python
174 lines
4.6 KiB
Python
# ~*~ encoding: utf-8 ~*~ #
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import random
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class Noise:
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# ajout de bruit "poivre & sel" avec un seuil (% de l'image bruité)
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def SaltAndPepper_set(self, seuil, pixelMap):
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seuil = float(seuil);
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while seuil >= 1:
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seuil /= 100
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nbPixel = int( len(pixelMap) * len(pixelMap[0]) * seuil )
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for bruit in range(0, nbPixel ):
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x = random.randint(0, len(pixelMap[0]) - 1 )
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y = random.randint(0, len(pixelMap) - 1 )
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if random.randint(0,1) == 1:
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pixelMap[y][x].setRGB(255,255,255);
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else:
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pixelMap[y][x].setRGB(0,0,0);
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# enlève le bruit "poivre et sel"
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def SaltAndPepper_unset(self, pixelMap):
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width = len( pixelMap[0] )
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height = len( pixelMap )
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seuil = int( .5 * 256 );
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for y in range(0, len(pixelMap)):
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for x in range(0, len(pixelMap[y])):
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pMoy = ( pixelMap[y][x].r + pixelMap[y][x].g + pixelMap[y][x].b ) / 3
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# traitement si couleur extreme
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if pMoy >= 235 or pMoy <= 20:
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xmin, ymin, xmax, ymap = x, y, x, y;
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rMoy, gMoy, bMoy, count = 0.0, 0.0, 0.0, 0 # moyennes des couleurs
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rInterval, gInterval, bInterval, rgbInterval = 0, 0, 0, 0 # décalage avec le pixel
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if y-1 > -1:
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ymin = y-1
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if y+1 < height:
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ymax = y+1
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if x-1 > -1:
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xmin = x-1
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if x+1 < width:
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xmax = x+1
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for j in range(0, ymax-xmin): # on parcourt les pixels autour
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for i in range(0, xmax-xmin):
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# calcul de la moyenne autour du pixel
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if i != x and j != y:
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rMoy += pixelMap[j][i].r;
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gMoy += pixelMap[j][i].g;
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bMoy += pixelMap[j][i].b;
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count += 1
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if count > 0:
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rMoy = int( rMoy / count )
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gMoy = int( gMoy / count )
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bMoy = int( bMoy / count )
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rInterval = abs( pixelMap[y][x].r - rMoy )
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gInterval = abs( pixelMap[y][x].g - gMoy )
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bInterval = abs( pixelMap[y][x].b - bMoy )
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rgbInterval = ( rInterval + gInterval + bInterval ) / 3
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# si la couleur est trop "différente" alors on remplace sa couleur par la moyenne des couleurs alentours
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if rgbInterval > seuil:
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pixelMap[y][x].setRGB(rMoy, gMoy, bMoy);
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def getShapeRecursive(self, coords, pixelMap, pixelList ): # return PixelList
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# coords = [lastx, lasty, x, y]
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width = len( pixelMap[0] )
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height = len( pixelMap )
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lastx = coords[0]
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lasty = coords[1]
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x = coords[2]
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y = coords[3]
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newCoords = [x, y]
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# si le pixel existe (pas de dépassement de la pixelMap)
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if x<width and x>=0 and y<height and y>=0:
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already = False;
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for i in range(0, len(pixelList)):
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if pixelList[i] == pixelMap[y][x]:
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already = True;
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break
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# si le pixel n'est pas déjà dans le tableau
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if not already:
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# si trop de différence
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lastP = pixelMap[lasty][lastx]
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pix = pixelMap[y][x]
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if abs(lastP.r-pix.r) <= 50 and abs(lastP.g-pix.g) <= 50 and abs(lastP.b-pix.b) <= 50:
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pixelList.append( pixelMap[y][x] ) # ajout au tableau
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self.getShape( [x, y, x-1, y+1], pixelMap, pixelList) # 1
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self.getShape( [x, y, x, y+1], pixelMap, pixelList) # 2
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self.getShape( [x, y, x+1, y+1], pixelMap, pixelList) # 3
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self.getShape( [x, y, x-1, y ], pixelMap, pixelList) # 4
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# current pixel
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self.getShape( [x, y, x+1, y ], pixelMap, pixelList) # 6
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self.getShape( [x, y, x-1, y-1], pixelMap, pixelList) # 7
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self.getShape( [x, y, x, y-1], pixelMap, pixelList) # 8
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self.getShape( [x, y, x+1, y-1], pixelMap, pixelList) # 9
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def getShape(self, coords, pixelMap, pixelList):
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# coords = [lastx, lasty, x, y]
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width = len( pixelMap[0] )
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height = len( pixelMap )
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lastx = coords[0]
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lasty = coords[1]
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x = coords[2]
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y = coords[3]
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if x<width and x>=0 and y<height and y>=0:
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already = False;
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for pix in pixelList:
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if pix == pixelMap[y][x]:
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already = True;
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break
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# si le pixel n'est pas déjà dans le tableau
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if not already:
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# si trop de différence
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lastP = pixelMap[lasty][lastx]
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pix = pixelMap[y][x]
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if abs(lastP.r-pix.r) <= 50 and abs(lastP.g-pix.g) <= 50 and abs(lastP.b-pix.b) <= 50:
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return pixelMap[y][x];
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# self.getShape( [x, y, x-1, y+1], pixelMap, pixelList) # 1
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# self.getShape( [x, y, x, y+1], pixelMap, pixelList) # 2
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# self.getShape( [x, y, x+1, y+1], pixelMap, pixelList) # 3
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# self.getShape( [x, y, x-1, y ], pixelMap, pixelList) # 4
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# # current pixel
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# self.getShape( [x, y, x+1, y ], pixelMap, pixelList) # 6
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# self.getShape( [x, y, x-1, y-1], pixelMap, pixelList) # 7
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# self.getShape( [x, y, x, y-1], pixelMap, pixelList) # 8
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# self.getShape( [x, y, x+1, y-1], pixelMap, pixelList) # 9
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return None # return none si le pixel n'est plus de la forme |