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OK, so I’m taking your advice and putting things back the way they were.
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<div class="">I spent 45+ minutes trying to figure out how to make vtkImageData reflect using vtkImageFlip. So I gave up and just used the Accelerate Framework in iOS to get the job done which was trivial. Would be nice if someone could give an example that
works within the context of VES, because the example I found was making calls into VTK actors and mappers that aren’t available (in an obvious way) to VES.</div>
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<div class=""> void *rawPixelData = malloc(<span style="font-family: Menlo; font-size: 11px;" class="">videoFrame.</span><span style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);" class="">totalBytes</span>);</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class=""> vImage_Buffer</span> mirrorImageBuffer;</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> mirrorImageBuffer.<span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">width</span> = videoFrame.<span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">width</span>;</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> mirrorImageBuffer.<span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">height</span> = videoFrame.<span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">height</span>;</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> mirrorImageBuffer.<span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">rowBytes</span> = videoFrame.<span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">bytesPerRow</span>;</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> mirrorImageBuffer.<span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">data</span> = rawPixelData;</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> <span style="font-variant-ligatures: no-common-ligatures; color: #3d1d81" class="">
vImageVerticalReflect_ARGB8888</span>(&rgbaImageBuffer, &mirrorImageBuffer, <span style="font-variant-ligatures: no-common-ligatures; color: #3d1d81" class="">
kvImageDoNotTile</span>);</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""><span class="Apple-tab-span" style="white-space:pre"></span>…</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> free(rawPixelData);</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class="">My thought was that within the vesKiwiImagePlaneDataRepresentation you could just flip the image in setImageData, but I felt to do it there I would be down to manipulating the shader per
usual and I’m loath to do that.</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class="">cameron.</div>
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<div class="">On 26. jan. 2015, at 14.53, Cory Quammen <<a href="mailto:cory.quammen@kitware.com" class="">cory.quammen@kitware.com</a>> wrote:</div>
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I don't know if that's a supremely bad idea, but it may make life complicated if you want to display anything else besides the image :-)
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<div class="">It might be safest to just flip the image with the vtkImageFlip filter or flip the order of pixels in the incoming image yourself.</div>
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<div class="gmail_quote">On Mon, Jan 26, 2015 at 8:49 AM, Cameron Lowell Palmer<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:cameron.palmer@ntnu.no" target="_blank" class="">cameron.palmer@ntnu.no</a>></span><span class="Apple-converted-space"> </span>wrote:<br class="">
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<div class="">On a scale of 1 to supremely bad idea, how about flipping the location of the camera and view up?</div>
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<div class="">I did precisely that by making the camera face the positive z-axis, this also required me to flip the Y-Axis by changing the view up. I thought the issue was that the camera facing the negative z-axis and therefore was seeing the backside of the
image.</div>
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<div class="">cameron</div>
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<span style="font-weight: bold;" class="">From:<span class="Apple-converted-space"> </span></span>Cory Quammen <<a href="mailto:cory.quammen@kitware.com" target="_blank" class="">cory.quammen@kitware.com</a>><br class="">
<span style="font-weight: bold;" class="">Date:<span class="Apple-converted-space"> </span></span>mandag 26. januar 2015 14.45<br class="">
<span style="font-weight: bold;" class="">To:<span class="Apple-converted-space"> </span></span>Cameron Lowell Palmer <<a href="mailto:cameron.palmer@ntnu.no" target="_blank" class="">cameron.palmer@ntnu.no</a>><br class="">
<span style="font-weight: bold;" class="">Cc:<span class="Apple-converted-space"> </span></span>VTK Users <<a href="mailto:vtkusers@vtk.org" target="_blank" class="">vtkusers@vtk.org</a>><br class="">
<span style="font-weight: bold;" class="">Subject:<span class="Apple-converted-space"> </span></span>Re: [vtkusers] vtkImageData Reflection<br class="">
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<div dir="ltr" class="">Cameron,
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<div class="">It looks like your camera's convention for image origin and VTK's disagree. You could correct it in the display by scaling the reversed axis of the actor that displays the image by -1, or you can flip the data after import with a vtkImageFlip
filiter.</div>
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<div class="">HTH,</div>
<div class="">Cory</div>
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<div class="gmail_quote">On Mon, Jan 26, 2015 at 7:29 AM, Cameron Lowell Palmer<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:cameron.palmer@ntnu.no" target="_blank" class="">cameron.palmer@ntnu.no</a>></span><span class="Apple-converted-space"> </span>wrote:<br class="">
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class="">When receiving a camera frame I’m converting to vtkImageData like this:</div>
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<span style="" class=""> </span><span style="color: rgb(187, 44, 162);" class="">auto</span><span style="" class=""><span class="Apple-converted-space"> </span>imageImport =<span class="Apple-converted-space"> </span></span>vtkSmartPointer<span style="" class=""><</span>vtkImageImport<span style="" class="">>::</span><span style="color: rgb(61, 29, 129);" class="">New</span><span style="" class="">();</span></div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> imageImport-><span style="color: rgb(61, 29, 129);" class="">SetDataSpacing</span>(<span style="color: rgb(39, 42, 216);" class="">1.0f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">1.0f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">1.0f</span>);</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> imageImport-><span style="color: rgb(61, 29, 129);" class="">SetDataOrigin</span>(<span style="color: rgb(39, 42, 216);" class="">0.f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">0.f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">0.f</span>);</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> imageImport-><span style="color: rgb(61, 29, 129);" class="">SetWholeExtent</span>(<span style="color: rgb(39, 42, 216);" class="">0.f</span>, videoFrame.<span style="color: rgb(79, 129, 135);" class="">width</span><span class="Apple-converted-space"> </span>-<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">1.f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">0.f</span>,
videoFrame.<span style="color: rgb(79, 129, 135);" class="">height</span><span class="Apple-converted-space"> </span>-<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">1.f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">0.f</span>,<span class="Apple-converted-space"> </span><span style="color: rgb(39, 42, 216);" class="">0.f</span>);</div>
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<span style="" class=""> imageImport-></span>SetDataExtentToWholeExtent<span style="" class="">();</span></div>
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<span style="" class=""> imageImport-></span>SetDataScalarTypeToUnsignedChar<span style="" class="">();</span></div>
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<span style="" class=""> imageImport-></span>SetNumberOfScalarComponents<span style="" class="">(</span><span style="color: rgb(39, 42, 216);" class="">4</span><span style="" class="">);</span></div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> imageImport-><span style="color: rgb(61, 29, 129);" class="">SetImportVoidPointer</span>(videoFrame.<span style="color: rgb(79, 129, 135);" class="">rawPixelData</span>);</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> imageImport-><span style="color: rgb(61, 29, 129);" class="">Update</span>();</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class=""> <span class="Apple-converted-space"> </span><span style="color: rgb(112, 61, 170);" class="">vtkSmartPointer</span><<span style="color: rgb(112, 61, 170);" class="">vtkImageData</span>>
imageData = imageImport-><span style="color: rgb(61, 29, 129);" class="">GetOutput</span>();</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class="">It works, but adding this to an image plane the image is mirrored across the Y-axis (right-left). Am I doing this image conversion correctly?</div>
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<div style="margin: 0px; font-size: 11px; font-family: Menlo;" class="">cameron</div>
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--<span class="Apple-converted-space"> </span><br class="">
<div class="">Cory Quammen<br class="">
R&D Engineer<br class="">
Kitware, Inc.</div>
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--<span class="Apple-converted-space"> </span><br class="">
<div class="gmail_signature">Cory Quammen<br class="">
R&D Engineer<br class="">
Kitware, Inc.</div>
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