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I'm not the author, but it seems like you're certainly right. Here's an example from the wiki page about how a single-pixel camera utilized notions of compresse

I'm not the author, but it seems like you're certainly right. Here's an example from the wiki page about how a single-pixel camera utilized notions of compressed sensing: http://en.wikipedia.org/wiki/Compressed_sensing#Photography http://en.wikipedia.org/wiki/Compressed_sensing#Photography I guess applying compressed sensing techniques would mean making assumptions about your image which allow you to fill in some of the blanks created by the incomplete angle and position coverage (i.e. the fact that the system is underdetermined). If you could somehow assume a certain redundancy, you could probably make guesses about what goes in the spots that didn't get well-covered.

lp251 12y ago
I doubt that compressed sensing will be very effective for this problem. Many of the guarantees for compressive signal recovery require incoherence between measurements- meaning each measurement is sufficiently different from the others. In this case, each measurement is highly correlated with the others. The Rice single pixel camera (discussed on the wiki page) effectively multiplies the image by a random mask before it is sensed by the photodiode. This is how they control the incoherence property.
- greendestiny 12y ago
  You might technically correct in the limited sense that this isn't a 'compressive' sensing - but it's an absolutely classical example of sparse reconstruction. You can resample that radon transformed image randomly and reconstruct it as a sparse fourier image. There is matlab code out there if you google around a bit.
  - thwest 12y ago
    Compressive Sensing using the Radon transform associated with radar has extensive literature. Not sure about the OPs imager. The optimization techniques are applicable to most sparse signal reconstruction transforms. Formally you would look to show the Restricted Isometery Property. http://users.ece.gatech.edu/~justin/ECE-8823a-Spring-2011/Resources_files/RandomConvolution-final-Aug09.pdf http://users.ece.gatech.edu/~justin/ECE-8823a-Spring-2011/Re...
    - greendestiny 12y ago
      It's a dense sensing of the radon transform - hence its not compressive. But you can resample that lots of ways and satisfy the RIP. Reconstruction of images from sparse radon transforms is one of the early examples that helped shape the field.
  - lp251 12y ago
    Sure- admittedly, confusing "sparse reconstruction" with "compressed sensing" is a pet peeve of mine.

lp251 12y ago

I doubt that compressed sensing will be very effective for this problem. Many of the guarantees for compressive signal recovery require incoherence between measurements- meaning each measurement is sufficiently different from the others. In this case, each measurement is highly correlated with the others. The Rice single pixel camera (discussed on the wiki page) effectively multiplies the image by a random mask before it is sensed by the photodiode. This is how they control the incoherence property.

greendestiny 12y ago
You might technically correct in the limited sense that this isn't a 'compressive' sensing - but it's an absolutely classical example of sparse reconstruction. You can resample that radon transformed image randomly and reconstruct it as a sparse fourier image. There is matlab code out there if you google around a bit.
- thwest 12y ago
  Compressive Sensing using the Radon transform associated with radar has extensive literature. Not sure about the OPs imager. The optimization techniques are applicable to most sparse signal reconstruction transforms. Formally you would look to show the Restricted Isometery Property. http://users.ece.gatech.edu/~justin/ECE-8823a-Spring-2011/Resources_files/RandomConvolution-final-Aug09.pdf http://users.ece.gatech.edu/~justin/ECE-8823a-Spring-2011/Re...
  - greendestiny 12y ago
    It's a dense sensing of the radon transform - hence its not compressive. But you can resample that lots of ways and satisfy the RIP. Reconstruction of images from sparse radon transforms is one of the early examples that helped shape the field.
- lp251 12y ago
  Sure- admittedly, confusing "sparse reconstruction" with "compressed sensing" is a pet peeve of mine.