| Data File(s) | Type | Description | Action |
|---|---|---|---|
pter_shells.csv (15.26 KB) | Comma Separated Values (.csv) | Primary data file for dataset ID 780791 | |
| Supplemental File(s) | Type | Description | Action |
transparency_code.m (2.88 KB) | MATLAB Programming Script (.m) | This MATLAB code converts an image (.jpg) of a pteropod shell take with a stereomicroscopoe and calculates the transmittance (images taken with light from below) or opacity (images taken with lighting from the sides) . The code identifies shells against the white background by thresholding the image to black and white. The aperture as well as any holes or dark areas resulting from remaining tissue are then manually cropped from the object. The transmittance was calculated as the mean grayscale value (range: 0-255) of the pixels of the shell divided by 255 to get a scale of 0 (black) to 1 (white), while opacity is calculated in the opposite fashion 1 (black) to 0 (white). |
Files
Filename: pter_shells.csv (15.26 KB)
Type: Comma Separated Values (.csv)
Description: Primary data file for dataset ID 780791
Type: Comma Separated Values (.csv)
Description: Primary data file for dataset ID 780791
Supplemental Files
Filename: transparency_code.m (2.88 KB)
Type: MATLAB Programming Script (.m)
Description: This MATLAB code converts an image (.jpg) of a pteropod shell take with a stereomicroscopoe and calculates the transmittance (images taken with light from below) or opacity (images taken with lighting from the sides) . The code identifies shells against the white background by thresholding the image to black and white. The aperture as well as any holes or dark areas resulting from remaining tissue are then manually cropped from the object. The transmittance was calculated as the mean grayscale value (range: 0-255) of the pixels of the shell divided by 255 to get a scale of 0 (black) to 1 (white), while opacity is calculated in the opposite fashion 1 (black) to 0 (white).
Type: MATLAB Programming Script (.m)
Description: This MATLAB code converts an image (.jpg) of a pteropod shell take with a stereomicroscopoe and calculates the transmittance (images taken with light from below) or opacity (images taken with lighting from the sides) . The code identifies shells against the white background by thresholding the image to black and white. The aperture as well as any holes or dark areas resulting from remaining tissue are then manually cropped from the object. The transmittance was calculated as the mean grayscale value (range: 0-255) of the pixels of the shell divided by 255 to get a scale of 0 (black) to 1 (white), while opacity is calculated in the opposite fashion 1 (black) to 0 (white).
