Correct image by scaling pixels #1
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
cmbruns
reviewed
Dec 13, 2021
| @@ -168,6 +168,8 @@ def _toqclass_helper(im): | |||
| data = im.tobytes("raw", "BGRA") | |||
| format = qt_format.Format_ARGB32 | |||
| elif im.mode == "I;16" and hasattr(qt_format, "Format_Grayscale16"): # Qt 5.13+ | |||
| im = im.point(lambda i: i * 255) | |||
There was a problem hiding this comment.
On reflection I believe the correct multiplier here should be 256, not 255. So the maximum intensity would be 255*256, which still falls within the unsigned 16-bit integer range.
There was a problem hiding this comment.
You're right. I've corrected my commit in your PR.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fixes python-pillow#5856 (comment) using your suggestion from python-pillow#5856 (comment)
I've also modified the test to check that the image contents are similar after roundtripping through ImageQt.