Chapter 5. Load Images

Table of Contents

5.1. Load images from local files
5.2. Load Images from online services
5.3. Load Images from CoreCast syndication feeds
5.3.1. Subscribe to CoreCast feeds
5.3.2. Load core images from CoreCast feeds
5.4. Load images using IODP-formatted section list
5.5. Load FMS images from IODP-USIO logging database

Before you proceed, make sure you know the following properties of the images to be loaded:

Corelyzer requires these properties to process and render section images at the correct scale.

How do you determine the DPI of your image? This depends on the equipment in which the image was retrieved. Most line-scan cameras that are manufactured for the creation of high-resolution images of core sections indicate DPI on their packaging, but it seems that many don't save in the expected DPI. One method of ensuring a correct DPI is described in Making Sure the DPI of an Image is Correct. When loading images you can also specify the length of a core section image, from which Corelyzer can calculate the appropriate DPI value.

5.1. Load images from local files

To start the image loading process, select the menu item "File > Load Images > Open Local Image Files...". Choose the files you wish to load in the resulting dialog:

Figure 5.1. Select image files to load

Select image files to load

By default, Corelyzer displays core imagery by placing section images in horizontal tracks. Each track corresponds to a single hole. After images to load are selected, Corelyzer will attempt to organize these images into new and/or existing tracks based on image filenames and existing track names (if present). The following dialog displays the suggested organization and allows the user to modify it as needed.

Figure 5.2. Arrange loaded image files

Arrange loaded image files

In Figure 5.2, note that the seven loaded sections have been organized into three tracks. Tracks are indicated by "Track" prefixing their name and a beige background. Note that all sections and tracks have a green dot to their left indicating that they've just been loaded (sections) or created (tracks). Most operations in this dialog apply only to these new tracks and sections. To adjust the structure and arrangement of tracks and sections, use the buttons described below:

  • Move Up/Down: Move selected sections up/down within a track or between tracks.

  • Delete: Remove selected section or track from the list. Tracks containing sections cannot be deleted until emptied.

  • Rename Track: Rename selected track.

  • New Track: Create a new track.

Once the arrangement of sections and tracks is satisfactory, input your images' DPI values in the DPI X/Y fields. Because DPI X and DPI Y are almost always the same, the value entered in the X field will be immediately copied into the Y field if it's blank. Orientation defaults to Horizontal, change it to Vertical if necessary. Now that image properties and section order have been established, Corelyzer can place sections in appropriate tracks and position them end-to-end. To proceed, click the "Next >" button. The resulting dialog allows the user to review and modify image properties, if necessary:

Figure 5.3. Set image properties

Set image properties

As you can see in the (rightmost) Depth column, the first three sections start from depth zero: each is the first section in a new track. The last four sections are part of the third track: each is placed at the bottommost depth of the preceding section.

The section image properties can be modified individually by selecting the cell you wish to change and hitting the Return/Enter key, or by double-cliking the desired cell. To modify a value(s) for multiple sections, you can use the Batch Input controls below the section property table. Check the "Batch input..." checkbox to enable the controls, and enter the desired settings. If you want to apply these settings to all sections in the table, click the Apply to All Rows button. If you want to apply these settings only to certain sections, select those sections in the section property table, then click the Apply to Selected Rows button. In both cases, only populated fields will modify the corresponding table cells.

If you modify DPI values on the depth axis (DPI X for horizontal images, DPI Y for vertical), section lengths and depths will be updated automatically so sections in each track are positioned end-to-end when loaded.

When you are satisfied with the image properties, click the Finish button. Corelyzer will begin loading images with the specified parameters.

Once completed, the visualization window will display core images and the Section listbox in the main session/iCores window will update with the image filenames loaded in each track. Notice in the image below that the ruler in the core image closely matches the depth measurements at the bottom of the visualization window. This visual check is an excellent way to confirm the proper DPI values were used.

Figure 5.4. Visualization canvas with loaded core section image

Visualization canvas with loaded core section image