# Images' mask are in original size after pre-processing when the project is exported as segmentation masks

**URL:** <https://discuss.roboflow.com/t/images-mask-are-in-original-size-after-pre-processing-when-the-project-is-exported-as-segmentation-masks/929>\
**Category:** 🤝  Community Help\
**Tags:** bugs\
**Created:** [September 28, 2022, 7:26am UTC](https://discuss.roboflow.com/t/images-mask-are-in-original-size-after-pre-processing-when-the-project-is-exported-as-segmentation-masks/929 "2022-09-28T07:26:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![phuongnamly](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/phuongnamly/32/616_2.png) [@phuongnamly](https://discuss.roboflow.com/u/phuongnamly)\
**Post date:** [September 28, 2022, 7:26am UTC](https://discuss.roboflow.com/t/images-mask-are-in-original-size-after-pre-processing-when-the-project-is-exported-as-segmentation-masks/929/1 "2022-09-28T07:26:30Z")

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1. Project type (Semantic Segmentation)
2. The operating system & browser you are using and their versions
3. OS: Windows, browser: Chrome. Export format: Segmentation mask
4. I set preprocessing as 512x384 but when I download the images, a few images and their masks are still in its original size.  
Version link: nam-ly/stromatolites-onboard-detector-224-labels  
Example: Picture 4 in the testing set.  
Raw data:  
 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/1X/dfb50fee73b5177d7bef3debd55aa09e3e4d50f7.jpeg)

Post-processing on Roboflow:

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/1X/12c00b2a1ec57c9812caa9a0ffc6e130fc0a279f.jpeg)

Downloaded image:

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/roboflow1/original/1X/1aecb2af35b7064e3fc5ca0c75fffc0288f6ccb7.png)

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**Author:** ![Mohamed](https://yyz1.discourse-cdn.com/flex029/user_avatar/discuss.roboflow.com/mohamed/32/62_2.png) [@Mohamed](https://discuss.roboflow.com/u/Mohamed)\
**Post date:** [September 28, 2022, 7:58pm UTC](https://discuss.roboflow.com/t/images-mask-are-in-original-size-after-pre-processing-when-the-project-is-exported-as-segmentation-masks/929/2 "2022-09-28T19:58:00Z")

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Hi @phuongnamly - can you repost the information from this bug report to [this page](https://github.com/roboflow-ai/external-bugtracker) and include example files from your export? The `_classes.csv` file, annotation file(s), and example images and masks that exported _without_ errors along with images and masks that exported _with_ errors.

> **[GitHub - roboflow-ai/external-bugtracker](https://github.com/roboflow-ai/external-bugtracker)**
>
> Contribute to roboflow-ai/external-bugtracker development by creating an account on GitHub.

Thank you!