[CHROM] fixes index issues with numpy.where

bob/rppg/chrom/extract_utils.py

@@ -49,9 +49,12 @@ def compute_mean_rgb(image, mask=None):
       The mean blue value
   """
   assert len(image.shape) == 3, "This is meant to work with color images (3 channels)"
-  mean_r = numpy.mean(image[0, numpy.where(mask)])
-  mean_g = numpy.mean(image[1, numpy.where(mask)])
-  mean_b = numpy.mean(image[2, numpy.where(mask)])
+  #mean_r = numpy.mean(image[0, numpy.where(mask)])
+  #mean_g = numpy.mean(image[1, numpy.where(mask)])
+  #mean_b = numpy.mean(image[2, numpy.where(mask)])
+  mean_r = numpy.mean(image[0, mask])
+  mean_g = numpy.mean(image[1, mask])
+  mean_b = numpy.mean(image[2, mask])
   return mean_r, mean_g, mean_b