double totalSDRScore = 0.0;
for (int i = 1; i < (numberOfImagesToSee + 1); i++) {
mnistManager.setCurrent(i);
int[][] image = mnistManager.readImage();
retina.see2DIntArray(image);
spatialPooler.performPooling();
Set<ColumnPosition> columnActivityAfterSeeingCurrentMNISTImage = spatialPooler
.getActiveColumnPositions();
// compute SDR score