Image processing method and device for constructing an image from adjacent images

  • US 5,444,478 A
  • Filed: 12/28/1993
  • Issued: 08/22/1995
  • Est. Priority Date: 12/29/1992
  • Status: Expired due to Fees
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First Claim
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1. A method of processing images for constructing a target image (Io) from adjacent images having a fixed frame line and referred to as source images (I1, . . . , Ii, Ij, . . . , In), said source and target images having substantially common view points, characterized in that the method comprises the steps of:

  • (a) digitizing said source and target images;

    (b) determining a substantially common view point (P) to said source and target images, and a fixed orthonormal landmark (Px, Py, Pz) originated at said common view point (P);

    (c) generating, pixel by pixel, an address, for each pixel, in the target image (Io), so as to entirely cover said target image (Io);

    (d) calculating, on the basis of an address (Ao) of a current pixel referred to as an initial pixel (m'"'"') in the target image (Io), an orientation, in said fixed landmark, of a straight light ray (PM) passing through said initial pixel (m'"'"') and through said common view point;

    (e) selecting a source image (Ij) traversed by said straight light ray (PM);

    (f) calculating, from said orientation of the straight light ray (PM), an address (Aq) of a distortion corrected point (m), in said selected source image (Ij), said distortion corrected point (m) corresponding to said initial pixel (m'"'"');

    (g) calculating a luminance value (F) at said distortion correct point m in said source image Ij;

    (h) assigning the luminance value (F) of said distortion corrected point (m) to the initial pixel (m'"'"') in the target image (Io);

    (i) repeating steps (d)-(h) for each pixel of the target image (Io), until all pixels of the target image (Io) have been processed.

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