90 lines
3.9 KiB
Python
Executable File
90 lines
3.9 KiB
Python
Executable File
#!/usr/bin/env python
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# Software License Agreement (BSD License)
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#
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# Copyright (c) 2012, Philipp Wagner
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of the author nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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import sys, math, Image
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def Distance(p1,p2):
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dx = p2[0] - p1[0]
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dy = p2[1] - p1[1]
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return math.sqrt(dx*dx+dy*dy)
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def ScaleRotateTranslate(image, angle, center = None, new_center = None, scale = None, resample=Image.BICUBIC):
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if (scale is None) and (center is None):
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return image.rotate(angle=angle, resample=resample)
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nx,ny = x,y = center
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sx=sy=1.0
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if new_center:
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(nx,ny) = new_center
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if scale:
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(sx,sy) = (scale, scale)
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cosine = math.cos(angle)
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sine = math.sin(angle)
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a = cosine/sx
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b = sine/sx
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c = x-nx*a-ny*b
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d = -sine/sy
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e = cosine/sy
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f = y-nx*d-ny*e
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return image.transform(image.size, Image.AFFINE, (a,b,c,d,e,f), resample=resample)
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def CropFace(image, eye_left=(0,0), eye_right=(0,0), offset_pct=(0.2,0.2), dest_sz = (70,70)):
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# calculate offsets in original image
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offset_h = math.floor(float(offset_pct[0])*dest_sz[0])
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offset_v = math.floor(float(offset_pct[1])*dest_sz[1])
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# get the direction
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eye_direction = (eye_right[0] - eye_left[0], eye_right[1] - eye_left[1])
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# calc rotation angle in radians
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rotation = -math.atan2(float(eye_direction[1]),float(eye_direction[0]))
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# distance between them
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dist = Distance(eye_left, eye_right)
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# calculate the reference eye-width
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reference = dest_sz[0] - 2.0*offset_h
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# scale factor
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scale = float(dist)/float(reference)
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# rotate original around the left eye
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image = ScaleRotateTranslate(image, center=eye_left, angle=rotation)
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# crop the rotated image
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crop_xy = (eye_left[0] - scale*offset_h, eye_left[1] - scale*offset_v)
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crop_size = (dest_sz[0]*scale, dest_sz[1]*scale)
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image = image.crop((int(crop_xy[0]), int(crop_xy[1]), int(crop_xy[0]+crop_size[0]), int(crop_xy[1]+crop_size[1])))
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# resize it
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image = image.resize(dest_sz, Image.ANTIALIAS)
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return image
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if __name__ == "__main__":
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image = Image.open("arnie.jpg")
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CropFace(image, eye_left=(252,364), eye_right=(420,366), offset_pct=(0.1,0.1), dest_sz=(200,200)).save("arnie_10_10_200_200.jpg")
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CropFace(image, eye_left=(252,364), eye_right=(420,366), offset_pct=(0.2,0.2), dest_sz=(200,200)).save("arnie_20_20_200_200.jpg")
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CropFace(image, eye_left=(252,364), eye_right=(420,366), offset_pct=(0.3,0.3), dest_sz=(200,200)).save("arnie_30_30_200_200.jpg")
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CropFace(image, eye_left=(252,364), eye_right=(420,366), offset_pct=(0.2,0.2)).save("arnie_20_20_70_70.jpg")
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