Photogrammetric data of circular target test fields for eccentricity analysis

Abstract

This data publication contains photogrammetric data of test fields of circles. Please download the zip files and extract them. There are three experiments: Experiment 1 (in "exp1_planar_test_field.zip"): A planar test field with 20 concentric circle targets. The 12 larger circles have inner radii of 15mm, outer radii of 30mm and a grid size of 67mm. There are 8 further smaller circles (inner radius: 3mm, outer radius: 6mm).

A bundle of 12 images (see "image_orientations.png" in "images_planar_test_field.zip") was recorded. Experiment 2 (in "exp2_nonplanar_test_field.zip"): A nonplanar test field with 60 concentric circle targets with inner radii of 13mm and outer radii of 26mm. A bundle of 12 images (see "image_orientations.png" in "images_nonplanar_test_field.zip") was recorded.

Experiment 3 (in "exp3_scale_bar_comparison.zip"): There three subexperiments with different circular target radii (5mm, 7.5mm, 10mm). Additionally, there is a scale bar with 2 targets with a radius of 5mm.

For each subexperiment, a bundle of 12 images (see "image_orientations.png" in "test_field_radius_*mm/images_scale_bar_comparison_radius_*mm.zip") was recorded. The planar test fields have 127 circular targets. In addition to the 127 targets, there are the two scale bar radii. All folders contain:

the initial values of the image orientaions with the projection center coordinates and the rotation angles. rotMat = [[cosPhicosKappa, -cosPhisinKappa, sinPhi], [cosOmegasinKappa + sinOmegasinPhiCosKappa, cosOmegacosKappa - sinOmegasinPhiSinKappa, -sinOmegacosPhi], [sinOmegasinKappa - cosOmegasinPhiCosKappa, sinOmegacosKappa + cosOmegasinPhiSinKappa, cosOmegacosPhi]]) the image measurements in pixels: ellipse center x,y (pixel coordinate system in the left upper pixel, x to the right, y points down), semi-axes a and b. Star operator was used (edge detection with Laplacian of Gauss filter). contour point coordinates of the star operator measurements. initial circle parameters for experiment 2 and 3: there is a additional pin file that contains the assignment of the image numbers and image names.