python - matplotlib show many images in single pdf page -


given image of unknown size input, following python script shows 8 times in single pdf page:

pdf = pdfpages( './test.pdf' ) gs = gridspec.gridspec(2, 4)  ax1 = plt.subplot(gs[0]) ax1.imshow( _img )  ax2 = plt.subplot(gs[1]) ax2.imshow( _img )  ax3 = plt.subplot(gs[2]) ax3.imshow( _img )  # on forth...  ax8 = plt.subplot(gs[7]) ax8.imshow( _img )  pdf.savefig() pdf.close()

the input image can have different size (unknown priori). tried using function gs.update(wspace=xxx, hspace=xxx) change spacing between images, hoping matplotlib automagically resize , redistribute images have least white space possible. however, can see below, didn't work expected.

is there better way go achieve following?

  1. have images saved max resolution possible
  2. have less white space possible

ideally 8 images page size of pdf (with minimum amount of margin needed).

enter image description here

enter image description here

you on right path: hspace , wspace control spaces between images. can control margins on figure top, bottom, left , right:

import matplotlib.pyplot plt import matplotlib.gridspec gridspec import matplotlib.image mimage matplotlib.backends.backend_pdf import pdfpages  _img = mimage.imread('test.jpg')  pdf = pdfpages( 'test.pdf' ) gs = gridspec.gridspec(2, 4, top=1., bottom=0., right=1., left=0., hspace=0.,         wspace=0.)  g in gs:     ax = plt.subplot(g)     ax.imshow(_img)     ax.set_xticks([])     ax.set_yticks([]) #    ax.set_aspect('auto')  pdf.savefig() pdf.close()

result:

enter image description here

if want images cover available space, can set aspect ratio auto:

ax.set_aspect('auto')

result:

enter image description here


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