Test Data

We provide three test datasets: gold_nanoparticle_06, gold_nanoparticle_07, and MoS2_14. The download links for these datasets are as follows:

The parameters for these datasets are as follows:

gold_nanoparticle_06

  • Scan points: 256 x 256

  • Diffraction image size: 128 x 128

  • Microscope model: Thermofisher FEI Titan G2 60-300

  • Camera model: Thermofisher EMPAD

  • Accelerating voltage (U): 60 kV

  • Camera length (CL): 576.6 mm

  • Convergence angle (α): 22.5 mrad

  • Scan step size: 1.80 nm

  • Defocus: In-focus

  • Notes: This dataset was captured at focus with gold nanoparticles embedded in DNA. It was pre-configured with a 30° scan rotation angle and exhibits some diffraction drift. This dataset is suitable for demonstrating the process of Rotational Offset Correction by calculating the curl of the CoM and the process of Diffraction Shift Alignment using FDDNet to measure the shift in each diffraction spot.

Note

On Google Drive, this dataset is split into multiple compressed files with extensions like .z01, .z02, etc. You need to download all compressed files before extracting them correctly.

gold_nanoparticle_07

  • Scan points: 128 x 128

  • Diffraction image size: 128 x 128

  • Microscope model: Thermofisher FEI Titan G2 60-300

  • Camera model: Thermofisher EMPAD

  • Accelerating voltage (U): 60 kV

  • Camera length (CL): 576.6 mm

  • Convergence angle (α): 22.5 mrad

  • Scan step size: 1.31 nm

  • Defocus: -2.11 μm (under-focused)

  • Notes: This dataset was captured under under-focus conditions, with gold nanoparticles embedded in DNA. In each diffraction image, the shape of the gold particles (real-space information) is visible. The sample stage height was adjusted to achieve the under-focus while maintaining the same scan rotation angle as the gold_nanoparticle_06 dataset. This dataset is suitable for demonstrating the process of Rotational Offset Correction using Axial BF images.

MoS2_14

  • Scan points: 128 x 128

  • Diffraction image size: 128 x 128

  • Microscope model: Thermofisher FEI Titan G2 60-300

  • Camera model: Thermofisher EMPAD

  • Accelerating voltage (U): 60 kV

  • Camera length (CL): 286.3 mm

  • Convergence angle (α): 22.5 mrad

  • Scan step size: 0.029 nm

  • Defocus: In-focus

  • Notes: This dataset represents atomic-level imaging of molybdenum disulfide (MoS₂), a 2D material. It is suitable for demonstrating the effects of different reconstruction methods.