Figure 1

Features extracted for the in situ expression patterns of two fly genes at embryonic developmental stage 7–8. The embryos were segmented from the background using a series of image processing operations (see Data). The gene expression patterns were extracted using a global Gaussian mixture-model [8]. The GMM-blobs were then generated using the 2D local GMM [8]. Different colors in a blob-set indicate different spatial blobs. The eigen-profiles were produced using the eigen-feature decomposition [9]. The wavelet-profiles were produced using the level-2 2D Haar wavelet decomposition [10].