title: Misalignment of a position after resizing an image with ImageMagick
body: <p>I want to resize several images and overlay them on a background image by using  Imagemagick.</p>
  
  <p>I wrote following code.</p>
  
  <pre><code>convert -size 500x1000 xc:white \
  -page +100+200 \( aaa.jpg -resize 50x \) \
  -page +200+300 \( bbb.jpg -resize 50x \) \
  ..............
  -layers flatten flatten_img.jpg"
  </code></pre>
  
  <p>I wanted to put the "aaa.jpg" on (100,200),
  and the "bbb.jpg" on (200,300),
  but the position of them were misaligned.</p>
  
  <p>For example, the "aaa.jpg" was positioned on (33,66).</p>
  
  <p>If I didn't resize them before doing "-page",
  that is, </p>
  
  <pre><code>convert -size 500x1000 xc:white \
  -page +100+200 aaa.jpg \
  -page +200+300 bbb.jpg \
  ......
  -layers flatten flatten_img.jpg"
  </code></pre>
  
  <p>the position of them were right.</p>
  
  <p>How Can I put them in the right places ?</p>
  
  <p>Thank you in advance.</p>