{"action":"created","issue":{"url":"https://api.github.com/repos/opencv/opencv/issues/13030","repository_url":"https://api.github.com/repos/opencv/opencv","labels_url":"https://api.github.com/repos/opencv/opencv/issues/13030/labels{/name}","comments_url":"https://api.github.com/repos/opencv/opencv/issues/13030/comments","events_url":"https://api.github.com/repos/opencv/opencv/issues/13030/events","html_url":"https://github.com/opencv/opencv/pull/13030","id":376857629,"node_id":"MDExOlB1bGxSZXF1ZXN0MjI3OTczNTUy","number":13030,"title":"G-API Tutorial","user":{"login":"dmatveev","id":144187,"node_id":"MDQ6VXNlcjE0NDE4Nw==","avatar_url":"https://avatars2.githubusercontent.com/u/144187?v=4","gravatar_id":"","url":"https://api.github.com/users/dmatveev","html_url":"https://github.com/dmatveev","followers_url":"https://api.github.com/users/dmatveev/followers","following_url":"https://api.github.com/users/dmatveev/following{/other_user}","gists_url":"https://api.github.com/users/dmatveev/gists{/gist_id}","starred_url":"https://api.github.com/users/dmatveev/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dmatveev/subscriptions","organizations_url":"https://api.github.com/users/dmatveev/orgs","repos_url":"https://api.github.com/users/dmatveev/repos","events_url":"https://api.github.com/users/dmatveev/events{/privacy}","received_events_url":"https://api.github.com/users/dmatveev/received_events","type":"User","site_admin":false},"labels":[{"id":241024968,"node_id":"MDU6TGFiZWwyNDEwMjQ5Njg=","url":"https://api.github.com/repos/opencv/opencv/labels/category:%20documentation","name":"category: documentation","color":"ededed","default":false},{"id":1069909827,"node_id":"MDU6TGFiZWwxMDY5OTA5ODI3","url":"https://api.github.com/repos/opencv/opencv/labels/category:%20g-api","name":"category: g-api","color":"ededed","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/opencv/opencv/milestones/20","html_url":"https://github.com/opencv/opencv/milestone/20","labels_url":"https://api.github.com/repos/opencv/opencv/milestones/20/labels","id":3726833,"node_id":"MDk6TWlsZXN0b25lMzcyNjgzMw==","number":20,"title":"4.0.0","description":"","creator":{"login":"alalek","id":4981219,"node_id":"MDQ6VXNlcjQ5ODEyMTk=","avatar_url":"https://avatars0.githubusercontent.com/u/4981219?v=4","gravatar_id":"","url":"https://api.github.com/users/alalek","html_url":"https://github.com/alalek","followers_url":"https://api.github.com/users/alalek/followers","following_url":"https://api.github.com/users/alalek/following{/other_user}","gists_url":"https://api.github.com/users/alalek/gists{/gist_id}","starred_url":"https://api.github.com/users/alalek/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alalek/subscriptions","organizations_url":"https://api.github.com/users/alalek/orgs","repos_url":"https://api.github.com/users/alalek/repos","events_url":"https://api.github.com/users/alalek/events{/privacy}","received_events_url":"https://api.github.com/users/alalek/received_events","type":"User","site_admin":false},"open_issues":38,"closed_issues":33,"state":"open","created_at":"2018-10-10T08:12:14Z","updated_at":"2018-11-06T20:08:51Z","due_on":null,"closed_at":null},"comments":1,"created_at":"2018-11-02T15:28:57Z","updated_at":"2018-11-06T20:32:51Z","closed_at":null,"author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/opencv/opencv/pulls/13030","html_url":"https://github.com/opencv/opencv/pull/13030","diff_url":"https://github.com/opencv/opencv/pull/13030.diff","patch_url":"https://github.com/opencv/opencv/pull/13030.patch"},"body":"This is an initial version of G-API tutorial, based on porting anisotropic image segmentation sample on G-API. This tutorial is written to close G-API documentation gaps for OpenCV 4.0 release, and will be further extended with new chapters on writing own kernels (in post-4.0 time frame).\r\n\r\nIn addition to the tutorial itself, this PR also contains the following changes:\r\n* Original anisotropic image segmentation tutorial has been modified to use `CV_32F` instead of `CV_64F` - result didn't change, but now it is portable;\r\n*  Two new kernels were added to G-API: `phase()` and `sqrt()`. Both are covered with documentation, accuracy tests, and implemented in OpenCV and Fluid backends;\r\n* A number of issues has been fixed in Fluid backend (e.g. its standard kernels were not exported);\r\n* `GKernelPackage` has been extended with new methods for finer-grain control over its contents;\r\n* Fluid implementation of Sobel kernel was extended to support F32, though the complete work is done by @elatkin in #13042; \r\n* Fluid implementation of InRange kernel was extended to support F32;\r\n* Other issues were reported and fixed separately by @AsyaPronina."},"comment":{"url":"https://api.github.com/repos/opencv/opencv/issues/comments/436398352","html_url":"https://github.com/opencv/opencv/pull/13030#issuecomment-436398352","issue_url":"https://api.github.com/repos/opencv/opencv/issues/13030","id":436398352,"node_id":"MDEyOklzc3VlQ29tbWVudDQzNjM5ODM1Mg==","user":{"login":"dmatveev","id":144187,"node_id":"MDQ6VXNlcjE0NDE4Nw==","avatar_url":"https://avatars2.githubusercontent.com/u/144187?v=4","gravatar_id":"","url":"https://api.github.com/users/dmatveev","html_url":"https://github.com/dmatveev","followers_url":"https://api.github.com/users/dmatveev/followers","following_url":"https://api.github.com/users/dmatveev/following{/other_user}","gists_url":"https://api.github.com/users/dmatveev/gists{/gist_id}","starred_url":"https://api.github.com/users/dmatveev/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dmatveev/subscriptions","organizations_url":"https://api.github.com/users/dmatveev/orgs","repos_url":"https://api.github.com/users/dmatveev/repos","events_url":"https://api.github.com/users/dmatveev/events{/privacy}","received_events_url":"https://api.github.com/users/dmatveev/received_events","type":"User","site_admin":false},"created_at":"2018-11-06T20:32:51Z","updated_at":"2018-11-06T20:32:51Z","author_association":"CONTRIBUTOR","body":"How can I assign @elatkin and @mlyashko to review this? :thinking: "}}
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