.. _cam: MASCDB camera-wise data ======================================= The files *MASCdb_CAM0.parquet*,*MASCdb_CAM1.parquet*,*MASCdb_CAM2.parquet* contain the attributes listed in the table below. +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | Parameter | Units | Type | Long name | Reference / Format / Algorithm | +======================+=======+==========+=======================+===============================================+ | **Global information** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | datetime | | datetime | | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | campaign | | string | Field campaign string | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | pix_size | m | float | Pixel size | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | n_roi | | int | | # of ROIs | | Praz et al, 2017 | | | | | | in raw image | | Note: only one main ROI | | | | | | | is considered in the descriptors | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | cam_id | | int | Camera ID: 0, 1, 2 | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | roi_width | pix | int | | x-size of crop of | | | | | | | the selected ROI | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | roi_height | pix | int | | y-size of crop of | | | | | | | the selected ROI | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | roi_centroid_X | pix | int | | Centroid X coord | | | | | | | (original image) | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | roi_centroid_X | pix | int | | Centroid Y coord | | | | | | | ( original image) | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Particle size and area** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | area | m^2 | float | Particle area | Table A1:1 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | perim | m | float | Particle perimeter | Table A1:2 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | Dmean | m | float | Mean (x/y) dimension | Table A1:3 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | Dmax | m | float | Max dimension | Table A1:4 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | Dmax_ori | deg | float | Orientation of Dmax | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | Dmax_90 | m | float | | Max. dimension in | Baker and Lawson 2006 | | | | | | orthogonal dir. | | | | | | | of Dmax. | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | D90_r | | float | | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | eq_radius | m | float | Equiv. area radius | Table A1:5 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | area_porous | m^2 | float | | Porous area | Table A1:6 in Praz et al, 2017 | | | | | | (holes removed) | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | area_porous_r | m^2 | float | | Ratio area_porous | Table A1:7 in Praz et al, 2017 | | | | | | over area | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Elliptical approximation: fitted ellipse** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_A | m | float | Major dimension | Table A1:8 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_B | m | float | Minor dimension | Table A1:9 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_area | m^2 | float | Area | Table A1:10 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_ori | deg | float | Orientation | Table A1:11 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_a_r | | float | Axis ratio | Table A1:12 in Praz et al, 2017 | | | | | (ell_fit_A/ell_fit_B) | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_fit_ecc | | float | Eccentricity | Table A1:13 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | compactness | | float | area / ell_fit_area | Table A1:14 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Elliptical approximation: inscribed ellipse (same center and orientation of fitted one)** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_in_A | m | float | Major dimension | Table A1:15 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_in_B | m | float | Minor dimension | Table A1:16 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_in_area | m^2 | float | Area | Table A1:17 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Elliptical approximation: circumscribed ellipse (same center and orientation of fitted one)** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_out_A | m | float | Major dimension | Table A1:18 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_out_B | m | float | Minor dimension | Table A1:19 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | ell_out_area | m^2 | float | Area | Table A1:20 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Particle shape** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | roundness | | float | | Area / | Table A1:30 in Praz et al, 2017 | | | | | | circum. circle area | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | p_circ_out_r | | float | | Circ. circle perim/ | Table A1:31 in Praz et al, 2017 | | | | | | perimeter | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | rectangularity | | float | | Area / | Table A1:32 in Praz et al, 2017 | | | | | | bounding box area | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | bbox_width | m | float | Bounding box width | Table A1:33 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | bbox_len | m | float | Bounding box height | Table A1:34 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | rect_perim_ratio | | float | | Bounding box perim/ | Table A1:35 in Praz et al, 2017 | | | | | | perimeter | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | rect_aspect_ratio | | float | B. box aspect ratio | Table A1:36 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | rect_eccentricity | | float | B. box eccentricity | Table A1:37 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | solidity | | float | Area/convex hull area | Table A1:38 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | convexity | | float | | Convex hull perim. | Table A1:39 in Praz et al, 2017 | | | | | | / perimeter ratio | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hull_n_angles | | int | # vertices con. hull | Table A1:40 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | p_circ_r | | float | | Perimeter/ eq. area | Table A1:41 in Praz et al, 2017 | | | | | | circle perimeter | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | frac_dim_boxcounting | | float | Fractal dim. (box) | Table A1:42 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | frac_dim_theoretical | | float | Fractal dim. | | Table A1:43 in Praz et al, 2017 | | | | | | | Grazioli et al, 2014 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | nb_holes | | int | # holes inside ROI | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Morphological skeleton** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | skel_N_ends | | int | | Skeleton # ending | Table A1:44 in Praz et al, 2017 | | | | | | points | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | skel_N_junc | | int | Skeleton # junctions | Table A1:45 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | skel_perim_ratio | | float | | Skeleton length / | Table A1:46 in Praz et al, 2017 | | | | | | perimeter | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | skel_area_ratio | 1/m | float | | Skeleton length | Table A1:47 in Praz et al, 2017 | | | | | | area | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Rotational symmetry** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_P1 ... sym_P6 | | float | | Standardized dist. | Table A1:49-54 in Praz et al, 2017 | | | | | | to centroid Fourier | | | | | | | power spec. P1...P6 | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_Pmax_id | | int | ID of max. (sym_P*) | Table A1:55 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_P6_max_ratio | | float | sym_P6 / max(sym_P*) | Table A1:56 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_mean | pix | float | Mean dist. to centroid| Table A1:57 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_std | pix | float | | Standard deviation | Table A1:58 in Praz et al, 2017 | | | | | | dist. to centroid | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | sym_std_mean_ratio | | float | sym_std / sym_mean | Table A1:59 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Texture operators (for ROI/particle)** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | intensity_mean | | float | Mean pixel brightness | Table A1:60 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | intensity_max | | float | Max. pixel brightness | Table A1:61 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | contrast | | float | Contrast | Table A1:62 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | intensity_std | | float | std. pixel brightness | Table A1:63 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hist_entropy | | float | Bright. hist. entropy | Table A1:64 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | local_std | | float | | Average local (3x3) | Table A1:65 in Praz et al, 2017 | | | | | | intensity std | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | local_intens | | float | | Average local (3x3) | Table A1:66 in Praz et al, 2017 | | | | | | mean intensity | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | lap_energy | | float | Energy of Laplacian | Table A1:67 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | wavs | | float | Sum of wavelet coeff. | Table A1:68 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | complexity | | float | Particle complexity | | Table A1:69 in Praz et al, 2017 | | | | | | | Garrett and Yuter, 2014 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Haralick features** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | har_energy | | float | Haralick energy | Table A1:70 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | har_contrast | | float | Haralick contrast | Table A1:71 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | har_corr | | float | Haralick correlation | Table A1:72 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | har_hom | | float | Haralick homogeneity | Table A1:73 in Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Riming estimation information** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | riming_deg_level | | float | | Continuous riming | Rc in Praz et al, 2017 | | | | | | degree level | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | riming_class_id | | int | | Discrete riming | | Praz et al, 2017 | | | | | | degree class ID | | 0: undefined, 1: unrimed, 2: rimed | | | | | | | 3: densely-rimed, 4: graupel-like, 5:graupel| +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | riming_class_prob | | float | | Riming classif | Praz et al, 2017 | | | | | | probability | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | riming_class_name | | string | | Discrete riming | See riming_class_id | | | | | | degree class name | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Melting estimation information** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | melting_class_id | | int | | Discrete melting | | Praz et al, 2017 | | | | | | class ID | | 0: dry, 1: melting | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | melting_prob | | float | Melting probability | | Praz et al, 2017 | | | | | | | If rounded, it yields melting_class_id | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | melting_class_name | | string | Discrete melting | See melting_class_id | | | | | class name | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Hydrometeor type estimation information** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | snowflake_class_name | | string | Hydrometeor | | Praz et al, 2017 | | | | | class name | | See snowflake_class_id | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | snowflake_class_id | | int | | Hydrometeor | | Praz et al, 2017 | | | | | | class id | | 1: small_particle, 2: columnar_crystal, | | | | | | | 3: planar_crystal, 4: aggregate, | | | | | | | 5: graupel, 6: columnar_planar_combination | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | snowflake_class_prob | | float | | Classification | | | | | | | probability | | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | **Human label information** | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_snowflake | | int | | Human-label | | Boolean flag. If set to 1, this particle | | | | | | hydrometeor set | | (in this CAM view) was part of the human | | | | | | | labelled training set of Praz et al, 2017 | | | | | | | for hydrometeor classification | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_snowflake_class_id| | int | | Human-label | | Human-labeled snowflake_class_id | | | | | | hydrometeor class | | for the training set of Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_melting | | int | Human-label melting | | Boolean flag. If set to 1, this particle | | | | | set | | (in this CAM view) was part of the human | | | | | | | labelled training set of Praz et al, 2017 | | | | | | | for melting identification | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_melting_class_id | | int | | Human-label | | Human-labeled melting_class_id | | | | | | melting class | | for the training set of Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_riming | | int | Human-label riming | | Boolean flag. If set to 1, this particl | | | | | | | (in this CAM view) was part of the human | | | | | | | labelled training set of Praz et al, 2017 | | | | | | | for riming degree estimation | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ | hl_riming_class_id | | int | | Human-label | | Human-labeled riming_class_id | | | | | | riming class | | for the training set of Praz et al, 2017 | +----------------------+-------+----------+-----------------------+-----------------------------------------------+ References ----------------------------------------------- - `Baker and Lawson, 2006 `_: Baker, B. & Lawson, R. P. Improvement in Determination of Ice Water Content from Two-Dimensional Particle Imagery. Part I: Image-to-Mass Relationships.J. Appl. Meteorol. Climatol.45, 1282-1290, https://doi.org/10.1175/JAM2398.1, 2006. - `Praz et al, 2017 `_: Praz, C., Roulet, Y.-A., and Berne, A.: Solid hydrometeor classification and riming degree estimation from pictures collected with a Multi-Angle Snowflake Camera, Atmos. Meas. Tech., 10, 1335-1357, https://doi.org/10.5194/amt-10-1335-2017, 2017. - `Grazioli et al, 2014 `_: Grazioli, J., Tuia, D., Monhart, S., Schneebeli, M., Raupach, T., and Berne, A.: Hydrometeor classification from two-dimensional video disdrometer data, Atmos. Meas. Tech., 7, 2869-2882, https://doi.org/10.5194/amt-7-2869-2014, 2014. - `Garrett and Yuter, 2014 `_: Garrett, T. J. & Yuter, S. E. Observed influence of riming, temperature, and turbulence on the fallspeed of solid precipitation. Geophys. Res. Lett.41, 6515-6522, https://doi.org/10.1002/2014GL061016, 2014.