Why does vgg.prepare() method create 9 copies of the given image?












1














I get this result when I apply vgg.prepare() to the following image:Input



I use this line of code:



Image.fromarray(np.uint8(vgg.prepare(pep).reshape(224,224,3)))


And get an image which is combined of 9 copies of the given image:



Output










share|improve this question






















  • Can you share how did you instantiate vgg and pep?
    – corochann
    Nov 12 at 8:02






  • 1




    pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
    – saman jahangiri
    Nov 12 at 8:09
















1














I get this result when I apply vgg.prepare() to the following image:Input



I use this line of code:



Image.fromarray(np.uint8(vgg.prepare(pep).reshape(224,224,3)))


And get an image which is combined of 9 copies of the given image:



Output










share|improve this question






















  • Can you share how did you instantiate vgg and pep?
    – corochann
    Nov 12 at 8:02






  • 1




    pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
    – saman jahangiri
    Nov 12 at 8:09














1












1








1







I get this result when I apply vgg.prepare() to the following image:Input



I use this line of code:



Image.fromarray(np.uint8(vgg.prepare(pep).reshape(224,224,3)))


And get an image which is combined of 9 copies of the given image:



Output










share|improve this question













I get this result when I apply vgg.prepare() to the following image:Input



I use this line of code:



Image.fromarray(np.uint8(vgg.prepare(pep).reshape(224,224,3)))


And get an image which is combined of 9 copies of the given image:



Output







python image pre-trained-model chainer vgg-net






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 12 at 7:32









saman jahangiri

377




377












  • Can you share how did you instantiate vgg and pep?
    – corochann
    Nov 12 at 8:02






  • 1




    pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
    – saman jahangiri
    Nov 12 at 8:09


















  • Can you share how did you instantiate vgg and pep?
    – corochann
    Nov 12 at 8:02






  • 1




    pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
    – saman jahangiri
    Nov 12 at 8:09
















Can you share how did you instantiate vgg and pep?
– corochann
Nov 12 at 8:02




Can you share how did you instantiate vgg and pep?
– corochann
Nov 12 at 8:02




1




1




pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
– saman jahangiri
Nov 12 at 8:09




pep=Image.open("/Users/macintosh/Desktop/Code/sngan_projection-master/images/red_pepper.jpg") and from chainer.links.model.vision import vgg
– saman jahangiri
Nov 12 at 8:09












1 Answer
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I finally got what you did...
the only mistake is .reshape.



Because the image is transposed, not reshaped, you have to re-transpose to restore the original image.



pep = pep.transpose((1, 2, 0))  # transpose
pep += [103.939, 116.779, 123.68] # un-normalize
pep = pep.astype(np.uint8) # revert dtype
pep = np.flip(pep, axis=2) # BGR -> RGB
PIL_image = Image.fromarray(pep) # finally got the original!





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    1 Answer
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    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    I finally got what you did...
    the only mistake is .reshape.



    Because the image is transposed, not reshaped, you have to re-transpose to restore the original image.



    pep = pep.transpose((1, 2, 0))  # transpose
    pep += [103.939, 116.779, 123.68] # un-normalize
    pep = pep.astype(np.uint8) # revert dtype
    pep = np.flip(pep, axis=2) # BGR -> RGB
    PIL_image = Image.fromarray(pep) # finally got the original!





    share|improve this answer


























      2














      I finally got what you did...
      the only mistake is .reshape.



      Because the image is transposed, not reshaped, you have to re-transpose to restore the original image.



      pep = pep.transpose((1, 2, 0))  # transpose
      pep += [103.939, 116.779, 123.68] # un-normalize
      pep = pep.astype(np.uint8) # revert dtype
      pep = np.flip(pep, axis=2) # BGR -> RGB
      PIL_image = Image.fromarray(pep) # finally got the original!





      share|improve this answer
























        2












        2








        2






        I finally got what you did...
        the only mistake is .reshape.



        Because the image is transposed, not reshaped, you have to re-transpose to restore the original image.



        pep = pep.transpose((1, 2, 0))  # transpose
        pep += [103.939, 116.779, 123.68] # un-normalize
        pep = pep.astype(np.uint8) # revert dtype
        pep = np.flip(pep, axis=2) # BGR -> RGB
        PIL_image = Image.fromarray(pep) # finally got the original!





        share|improve this answer












        I finally got what you did...
        the only mistake is .reshape.



        Because the image is transposed, not reshaped, you have to re-transpose to restore the original image.



        pep = pep.transpose((1, 2, 0))  # transpose
        pep += [103.939, 116.779, 123.68] # un-normalize
        pep = pep.astype(np.uint8) # revert dtype
        pep = np.flip(pep, axis=2) # BGR -> RGB
        PIL_image = Image.fromarray(pep) # finally got the original!






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 13 at 1:49









        Yuki Hashimoto

        3227




        3227






























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