Fix(2d_segmentation): Restore the predicted value of seg image to the range of 0~225 before saving it

[Reqwey]

Description

To fix the problem that evaluation output images are all black because post_trans scale their pixel values to 0~1.

Checks

• Avoid including large-size files in the PR.
• Clean up long text outputs from code cells in the notebook.
• For security purposes, please check the contents and remove any sensitive info such as user names and private key.
• Ensure (1) hyperlinks and markdown anchors are working (2) use relative paths for tutorial repo files (3) put figure and graphs in the ./figure folder
• Notebook runs automatically ./runner.sh -t <path to .ipynb file>

[ericspod]

Thanks for the contribution @Reqwey! You can actually set a scaling factor for SaveImage with the scale parameter. Setting scale to 255 should do the same as what you have here, so I'd suggest modifying your PR to do that. This is a bug in the tutorial either way so thanks for spotting it. Please also look at the instructions for resolving the DCO with a remedial commit.

[Reqwey]

Thanks for the contribution @Reqwey! You can actually set a scaling factor for SaveImage with the scale parameter. Setting scale to 255 should do the same as what you have here, so I'd suggest modifying your PR to do that. This is a bug in the tutorial either way so thanks for spotting it. Please also look at the instructions for resolving the DCO with a remedial commit.

Thanks for your guidance! Done:

• SaveImage(scale=255) (PR updated)
• DCO remedial commit

It's my pleasure to be able to make contributions to this extraordinary project!

[KumoLiu]

Thanks for the fix, LGTM.