{"action":"created","issue":{"url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/11","labels_url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/11/labels{/name}","comments_url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/11/comments","events_url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/11/events","html_url":"https://github.com/akvo/akvo-caddisfly/issues/11","id":92834941,"number":11,"title":"2.7  From the colour patches, derive color calibration curves and correct image","user":{"login":"mtwestra","id":478954,"avatar_url":"https://avatars.githubusercontent.com/u/478954?v=3","gravatar_id":"","url":"https://api.github.com/users/mtwestra","html_url":"https://github.com/mtwestra","followers_url":"https://api.github.com/users/mtwestra/followers","following_url":"https://api.github.com/users/mtwestra/following{/other_user}","gists_url":"https://api.github.com/users/mtwestra/gists{/gist_id}","starred_url":"https://api.github.com/users/mtwestra/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mtwestra/subscriptions","organizations_url":"https://api.github.com/users/mtwestra/orgs","repos_url":"https://api.github.com/users/mtwestra/repos","events_url":"https://api.github.com/users/mtwestra/events{/privacy}","received_events_url":"https://api.github.com/users/mtwestra/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/akvo/akvo-caddisfly/labels/Strip%20test","name":"Strip test","color":"fbca04"}],"state":"open","locked":false,"assignee":{"login":"mtwestra","id":478954,"avatar_url":"https://avatars.githubusercontent.com/u/478954?v=3","gravatar_id":"","url":"https://api.github.com/users/mtwestra","html_url":"https://github.com/mtwestra","followers_url":"https://api.github.com/users/mtwestra/followers","following_url":"https://api.github.com/users/mtwestra/following{/other_user}","gists_url":"https://api.github.com/users/mtwestra/gists{/gist_id}","starred_url":"https://api.github.com/users/mtwestra/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mtwestra/subscriptions","organizations_url":"https://api.github.com/users/mtwestra/orgs","repos_url":"https://api.github.com/users/mtwestra/repos","events_url":"https://api.github.com/users/mtwestra/events{/privacy}","received_events_url":"https://api.github.com/users/mtwestra/received_events","type":"User","site_admin":false},"milestone":null,"comments":4,"created_at":"2015-07-03T09:33:08Z","updated_at":"2015-07-29T08:37:47Z","closed_at":null,"body":"Using the calibration patch values we need to calibrate the image\r\nSteps to take are:\r\n1) using the calibration patch values, create colour calibration curves\r\n2) using the curves, correct the whole image."},"comment":{"url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/comments/125881352","html_url":"https://github.com/akvo/akvo-caddisfly/issues/11#issuecomment-125881352","issue_url":"https://api.github.com/repos/akvo/akvo-caddisfly/issues/11","id":125881352,"user":{"login":"mtwestra","id":478954,"avatar_url":"https://avatars.githubusercontent.com/u/478954?v=3","gravatar_id":"","url":"https://api.github.com/users/mtwestra","html_url":"https://github.com/mtwestra","followers_url":"https://api.github.com/users/mtwestra/followers","following_url":"https://api.github.com/users/mtwestra/following{/other_user}","gists_url":"https://api.github.com/users/mtwestra/gists{/gist_id}","starred_url":"https://api.github.com/users/mtwestra/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mtwestra/subscriptions","organizations_url":"https://api.github.com/users/mtwestra/orgs","repos_url":"https://api.github.com/users/mtwestra/repos","events_url":"https://api.github.com/users/mtwestra/events{/privacy}","received_events_url":"https://api.github.com/users/mtwestra/received_events","type":"User","site_admin":false},"created_at":"2015-07-29T08:37:47Z","updated_at":"2015-07-29T08:37:47Z","body":"One effect that is well known in imagery is 'vignetting', ie, the effect that light intensity or saturation reduced towards the corners of the image. A second order polynomial to correct the background can deal with this."}}