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Created by Emmanuel Promayon@promayoeOwner

Unexpected image behaviors in Viewers

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Bug filed on Bugzilla by @jaffarda on 2016-04-22

Overview:

when looking at an image in 2D viewer (axial for exemple)

  • pb1/ border voxels are only half-sized (both in 2D and in 3D)
  • pb2/ border box does not adjust to displayed image
  • pb3/ picking is not possible a all places inside pixels
  • pb4/ picking is possible outside the image
  • pb5/ picking actor (crossing bars are not always visible)

attached images are very small in number of voxels for a better view provided:

  • testImage.bmp (the expected visble result)
  • testData.raw (raw file for 2D images)
  • testData3D.raw (raw file for 3D image)
  • test1.mhd ( image 5x5x1 black & white grid, spacing 10x10x1)
  • test2.mhd ( image 5x5x1 black & white grid, spacing 1x1x1)
  • test_3D.mhd ( image 5x5x5 black & white grid, spacing 1x1x1)

testImages.zip

Steps to Reproduce

  • step 1/ Load test1.mhd in camitk
  • step 2/ click on centralViewer and press I (to toogle off image interpolation)
  • step 3/ open axial viewer (ctrl + 2)
  • step 4/ Pick a point (ctrl + click) close to the middle of a pixel
  • step 5/ Pick a point (ctrl + click) close to the border of a pixel
  • step 6/ Pick a point (ctrl + click) close to the middle of a pixel but on the outside of the displayed image
  • step 7/ Load test2.mhd, open axial viewer, toogle off interpolation
  • step 8/ Pick a point (ctrl + click) close to the middle of a pixel

Actual VS Expected Result

  • at step 2/ we see pb1 all the pixels are not the same size but they should
  • at step 3/ we see pb1 all the pixels are not the same size but they should
  • at step 3/ we see pb2 the border does not match the image but should
  • at step 5/ we see pb3 picking works close to centre of pixel but nowhere else picking should be available everwhere
  • at step 6/ we see pb4 it is possible to pick a point outside the image, it should not
  • at step 8/ we see pb5 when picking works (see with pb3) the actor (small lines) are not visible, it should

Relevant logs and/or screenshots:

See testImages.zip

Interpretation & Possible fixes:

  • pb1/ maybe miss set of dimensions?
  • pb2/ probably linked to pb1 the boxing seems to be the good size if pixels were correctly displayed
  • pb3/ maybe bad use of pixel size?
  • pb4/ probably linked to pb1 the selection box should be in pixel if pb1
  • pb5/ no ideas

CamiTK Version:

Filed for CamiTK 3.6, but confirmed still on 4.1.develop

Edited by Emmanuel Promayon