Upper panel: distribution of the FWHM of the Planck detections compared to the distribution of the local PSF at 857GHz (dashed line). Middle panel: distribution of the ellipticity of the cold clumps (solid line) and of the local PSF (dashed line). Lower panel: distribution of the position angle of the elliptical Gaussian of the clumps (solid line), of the local PSF (dashed line), and the difference between them (dotted line).