Used to screen images for quality, this web app allows users to view and score each image,
marking images to send back for repair, and entering comments. The flights database is built
the first time each site is visited in the app. Results are saved in the
flights database for each site, and are used by flights_report. Image scores are used to
help select the image to use when there are duplicated portable names. Minimum scores may
be included in search names. Rejected images are never used in fitting.
Details
screen builds the flights database for each site when you select it from the site
dropdown. An alternative to running screen is to call build_fights_db for each site
whenever new images are added. Scores may be added to a sites database
(flights/flights_<site>.txt) by hand if necessary.
When an image file is updated (presumably from downloading a repaired image), the old image is replaced in the database with the new one, thus the score, repair flag, and comments will be reset. This sets you up for assessing repaired images.
screen displays the selected image with a red outline indicating the site footprint.
It includes the following controls:
Site select the site. All sites listed in pars/sites.txt are included. The full site name will be displayed, along with the number of scored images, the total number of images, and the percent that have been scored.
Revisit images. Normally, images that have been scored or flagged for repair are hidden. Turn this switch on to revisit all images. (After scoring or flagging an image, it won't be hidden until changing sites or toggling this switch.)
Image filter enter a regular expression to filter images on either the file name or portable name (see
READMEfor a description of names). When the filter is in effect, only the selected images will be displayed. Usually, typing a distinct portion of the name will suffice, but you can go crazy with regular expressions if you want.Navigation buttons Jump to the first, previous, next, or last image for this site. It takes a couple of seconds to render high-resolution images.
Image info displays the image file name, the portable name, the number of bands, and key components of the image (type, sensor, season, year, and tide stage).
Image Score allows you to score each image for quality. Categories are unscored, poor, fair, good, very good, and excellent. Scoring should take into account the amount of missing data, image quality, and artifacts such as cloud stripes and water reflections.
Flag for repair marks images for repair (for instance, stripes are usually due to cloud cover on interleaved transects; image processing software can sometimes remove these). Images flagged for repair will be hidden unless Revisit images is selected.
Comments
Show zooms shows a 10x and 100x zoom of the center of the image for up-close quality inspection. It takes a moment.
Exit saves the flights database for the current site and exits (flights databases are also saved when switching sites).