# Segment mask disappear after auguementation

**URL:** <https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223>\
**Category:** 🛠️ Feature Reqs\
**Created:** [May 19, 2023, 2:55am UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223 "2023-05-19T02:55:15Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![narugo1992](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/narugo1992/32/1845_2.png) [@narugo1992](https://discuss.roboflow.com/u/narugo1992)\
**Post date:** [May 19, 2023, 2:55am UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223/1 "2023-05-19T02:55:15Z")

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This is my dataset: [anime\_person\_seg Instance Segmentation Dataset by narugo1992](https://universe.roboflow.com/narugo1992-ynxbj/anime_person_seg)

In the dataset viewing section, it can be observed that all 11 images have precise segmentation edge annotations. However, in the generated version “init” with data augmentation applied, most of the annotation information is lost.

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**Author:** ![narugo1992](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/narugo1992/32/1845_2.png) [@narugo1992](https://discuss.roboflow.com/u/narugo1992)\
**Post date:** [May 19, 2023, 2:56am UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223/2 "2023-05-19T02:56:20Z")

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This is dataset explore page

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/2X/4/42d93c82d90866462dd6df9ec92cff6f162be563.jpeg)

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<div class="post-metadata">

**Author:** ![narugo1992](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/narugo1992/32/1845_2.png) [@narugo1992](https://discuss.roboflow.com/u/narugo1992)\
**Post date:** [May 19, 2023, 2:57am UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223/3 "2023-05-19T02:57:35Z")

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And this is the dataset it actually generated, few of the images still have their mark

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/2X/c/c4d7b05c3de56d7622afc2ff9006d4a39caef375.jpeg)

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<div class="post-metadata">

**Author:** ![narugo1992](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/narugo1992/32/1845_2.png) [@narugo1992](https://discuss.roboflow.com/u/narugo1992)\
**Post date:** [May 19, 2023, 3:08am UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223/4 "2023-05-19T03:08:35Z")

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Here is more information I just tested:

- When I remove all the auguements, this issue is still here.
- When I remove all the auguements and preprocessings, it’s okay again.
- When I use resize preprocessing (without any auguments), the same issue appear.
- When I add some of the auguements (without any preprocessings), some of the images’ mark is gone.

So, I guess that some preprocessing and auguement stage is not compitable with segment task.

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<div class="post-metadata">

**Author:** ![narugo1992](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/narugo1992/32/1845_2.png) [@narugo1992](https://discuss.roboflow.com/u/narugo1992)\
**Post date:** [May 23, 2023, 3:17pm UTC](https://discuss.roboflow.com/t/segment-mask-disappear-after-auguementation/2223/5 "2023-05-23T15:17:13Z")

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I filed an issue here: [Segment mask disappear after auguementation · Issue #14 · roboflow/external-bugtracker · GitHub](https://github.com/roboflow/external-bugtracker/issues/14)