| 802 | | ||Civ1 |
| 803 | | ||Civ1_Dx,Civ1_Dy||grid mesh along x, y|| |
| 804 | | ||Civ1 |
| 805 | | ||Civ1 |
| 806 | | ||Civ1 |
| | 802 | ||Civ1(2)_CorrSmooth||smooth parameter for the image corr|| |
| | 803 | ||Civ1(2)_Dx,Civ1(2)_Dy||grid mesh along x, y|| |
| | 804 | ||Civ1(2)_CheckGrid||=1 if a grid file is used, default=0|| |
| | 805 | ||Civ1(2)_CheckMask||=1 if a mask file is used, default=0|| |
| | 806 | ||Civ1(2)_CheckThreshold||=0/1 image luminosity threshold used|| |
| 820 | | | '''tag''' | ''' content''' | | Civ1_X| x coordinates| | Civ1_Y| y coordinates| | Civ1_Z| z coordinates (for PIV in volume)| | Civ1_U| x velocity component| | Civ1_V| y velocity component| | Civ1_W| z velocity component (if relevant)| | Civ1_F| warning flag| | Civ1_C| image correlation| | Civ1_FF| error flag| | Civ1_U_smooth| smoothed x velocity component| | Civ1_V_smooth| smoothed y velocity component| | Civ1_W_smooth| smoothed z velocity component| | Civ1_SubRange| sub range bounds| | Civ1_NbSites| nbre of tps sites in each sub-range| | Civ1_Coord_tps| tps coordinates| | Civ1_U_tps| tps weights for x vel component| | Civ1_V_tps| tps weights for y vel component| | Civ1_W_tps| tps weights for z vel component| |
| 821 | | |
| 822 | | -'''List of constants, old CIVx conventions):''' -* nb_coord: =2 for PIV in a plane, =3 for PIV in a volume. -* nb_dim: =2 for the usual 2 component PIV, =3 for 3 component PIV (stereoscopic or volume). -* constant_pixcm: =1 for a simple linear calibration provided by the scaling factors pixcmx and pixcmy, =0 otherwise. -* pixcmx: scale pixel/space unit (cm by default) along the x direction (only if constant_pixcm=1). -* pixcmy: scale pixel/space unit (cm by default) along the y direction (only if constant_pixcm=1) -* absolut_time_T0: time elapsed since the time origin of the series (the mean time for the two images of the pair is taken). -* dt: time interval between the two images of the pair. -* absolut_time_T0_2: same as absolute_time_T0 for the fields obtained by the second iteration (civ2), using a possibly different image pair. -* dt2: same as dt for the fields obtained by the second iteration (civ2). -* hart: =1 if the Hart option has been used for processing (see ref.???), =0 otherwise. -* civ: =1 if a civ1 operation has been performed (=0 if the field is not obtained from an image pair) -* fix: =1 if a fix1 operation has been performed, -* patch: =1 if a patch1 operation has been performed. -* civ2: =1 if a civ2 operation has been performed. -* fix2:=1 if a fix2 operation has been performed. -* patch2: =1 if a Patch2 operation has been performed. -* patch_nx: number of grid points in the x direction for the patch field -* patch_ny: number of grid points in the y direction for the patch field -* ro_patch: smoothing coefficient rho used for patch -* patch2_nx: number of grid points in the x direction for the patch2 field -* patch2_ny: number of grid points in the y direction for the patch2 field -* ro2_patch: smoothing coefficient rho used for patch2 |
| 823 | | |
| 824 | | -'''List of field variables (old CIVx conventions):''' A set of velocity vectors is defined by a 1D array of position coordinates x, y, and z for 3D civ, and a corresponding array for each of the velocity components u, v, and w for 3C civ. The field is therefore defined on an arbitrary set of point, without restriction to a regular mesh. Additional arrays are used to keep track of the quality of the PIV process leading to each vector. The image correlation maximum is represented by vec_C (a real number between 0 and 1). A flag vec_F represents a warning on the vector quality (see the list of values below). Another flag FixFlag marks false vectors: FixFlag=0 for good vectors, and FixFlag is set to a non-zero value when it has been detected as false (using a 'fix' operation). |
| | 822 | || '''tag''' || ''' content''' || |
| | 823 | || Civ1_X|| x coordinates|| |
| | 824 | || Civ1_Y || y coordinates|| |
| | 825 | || Civ1_Z || z coordinates (for PIV in volume)|| |
| | 826 | || Civ1_U || x velocity component|| |
| | 827 | || Civ1_V || y velocity component || |
| | 828 | || Civ1_W|| z velocity component (if relevant)|| |
| | 829 | || Civ1_F|| warning flag|| |
| | 830 | || Civ1_C|| image correlation|| |
| | 831 | || Civ1_FF|| error flag|| |
| | 832 | || Civ1_U_smooth|| smoothed x velocity component|| |
| | 833 | || Civ1_V_smooth || smoothed y velocity component|| |
| | 834 | || Civ1_W_smooth || smoothed z velocity component || |
| | 835 | || Civ1_SubRange || sub range bounds|| |
| | 836 | || Civ1_NbSites || nbre of tps sites in each sub-range|| |
| | 837 | || Civ1_Coord_tps || tps coordinates || |
| | 838 | || Civ1_U_tps || tps weights for x vel component || |
| | 839 | || Civ1_V_tps || tps weights for y vel component || |
| | 840 | || Civ1_W_tps|| tps weights for z vel component|| |
| | 841 | |
| | 842 | -'''List of constants, old CIVx conventions):''' |
| | 843 | * nb_coord: =2 for PIV in a plane, =3 for PIV in a volume. |
| | 844 | * nb_dim: =2 for the usual 2 component PIV, =3 for 3 component PIV (stereoscopic or volume). |
| | 845 | * constant_pixcm: =1 for a simple linear calibration provided by the scaling factors pixcmx and pixcmy, =0 otherwise. |
| | 846 | * pixcmx: scale pixel/space unit (cm by default) along the x direction (only if constant_pixcm=1). |
| | 847 | * pixcmy: scale pixel/space unit (cm by default) along the y direction (only if constant_pixcm=1) |
| | 848 | * absolut_time_T0: time elapsed since the time origin of the series (the mean time for the two images of the pair is taken). |
| | 849 | * dt: time interval between the two images of the pair. |
| | 850 | * absolut_time_T0_2: same as absolute_time_T0 for the fields obtained by the second iteration (civ2), using a possibly different image pair. |
| | 851 | * dt2: same as dt for the fields obtained by the second iteration (civ2). |
| | 852 | * hart: =1 if the Hart option has been used for processing (see ref.???), =0 otherwise. |
| | 853 | * civ: =1 if a civ1 operation has been performed (=0 if the field is not obtained from an image pair) |
| | 854 | * fix: =1 if a fix1 operation has been performed, |
| | 855 | * patch: =1 if a patch1 operation has been performed. |
| | 856 | * civ2: =1 if a civ2 operation has been performed. |
| | 857 | * fix2:=1 if a fix2 operation has been performed. |
| | 858 | * patch2: =1 if a Patch2 operation has been performed. |
| | 859 | * patch_nx: number of grid points in the x direction for the patch field |
| | 860 | * patch_ny: number of grid points in the y direction for the patch field |
| | 861 | * ro_patch: smoothing coefficient rho used for patch |
| | 862 | * patch2_nx: number of grid points in the x direction for the patch2 field |
| | 863 | * patch2_ny: number of grid points in the y direction for the patch2 field |
| | 864 | * ro2_patch: smoothing coefficient rho used for patch2 |
| | 865 | |
| | 866 | -'''List of field variables (old CIVx conventions):''' A set of velocity vectors is defined by a 1D array of position coordinates x, y, and z for 3D civ, and a corresponding array for each of the velocity components u, v, and w for 3C civ. The field is therefore defined on an arbitrary set of point, without restriction to a regular mesh. Additional arrays are used to keep track of the quality of the PIV process leading to each vector. The image correlation maximum is represented by vec_C (a real number between 0 and 1). A flag vec_F represents a warning on the vector quality (see the list of values below). Another flag FixFlag marks false vectors: !FixFlag=0 for good vectors, and FixFlag is set to a non-zero value when it has been detected as false (using a 'fix' operation). |
| 830 | | | | ''' civ1''' | '''interp1''' | '''filter1 ''' | | dim. | nb_vectors | nb_vec_patch | nb_vec_patch | |x |vec_X |vec_patch_X | vec_patch_X | |y | vec_Y | vec_patch_Y | vec_patch_Y | |z | vec_Z | vec_patch_Z | vec_patch_Z | |u |vec_U | vec_patch0_U | vec_patch_U | |v |vec_V |vec_patch0_V | vec_patch_V | |w | vec_W |vec_patch0_W| vec_patch_W | |correlation | vec_C | | | |warning flag | vec_F | | | |false flag | vec_FixFlag | | | |du/dx | |vec_patch0_DUDX |vec_patch_DUDX | |du/dy | |vec_patch0_DUDY |vec_patch_DUDY | |dv/dx | |vec_patch0_DVDX |vec_patch_DVDX | |dv/dy | |vec_patch0_DVDY |vec_patch_DVDY | |
| | 872 | || ''' || civ1''' || '''interp1''' || '''filter1 ''' |
| | 873 | || dim. || nb_vectors || nb_vec_patch || nb_vec_patch |
| | 874 | ||x ||vec_X ||vec_patch_X || vec_patch_X || |
| | 875 | || y || vec_Y || vec_patch_Y || vec_patch_Y || |
| | 876 | ||z || vec_Z || vec_patch_Z || vec_patch_Z || |
| | 877 | ||u ||vec_U || vec_patch0_U || vec_patch_U || |
| | 878 | ||v ||vec_V ||vec_patch0_V || vec_patch_V || |
| | 879 | ||w || vec_W || vec_patch0_W|| vec_patch_W || |
| | 880 | ||correlation || vec_C || || || |
| | 881 | ||warning flag || vec_F || || || |
| | 882 | ||false flag || vec_FixFlag || || || |
| | 883 | ||du/dx || ||vec_patch0_DUDX ||vec_patch_DUDX || |
| | 884 | ||du/dy || ||vec_patch0_DUDY ||vec_patch_DUDY || |
| | 885 | ||dv/dx || ||vec_patch0_DVDX ||vec_patch_DVDX || |
| | 886 | ||dv/dy || ||vec_patch0_DVDY ||vec_patch_DVDY || |
