[Fix] Update cv2.imdecode to use cv2.IMREAD_COLOR for consistent

[GreatV]

This pull request updates multiple methods across the PPOCRLabel.py and libs/autoDialog.py files to improve clarity and maintainability by replacing the hardcoded 1 parameter in cv2.imdecode with the more descriptive cv2.IMREAD_COLOR. This change ensures better readability and aligns with OpenCV's standard practices.

Updates to cv2.imdecode usage:

• Replaced the 1 parameter with cv2.IMREAD_COLOR in the loadFile method to improve code clarity and consistency. (PPOCRLabel.py, PPOCRLabel.pyL2140-R2142)
• Updated the autoRecognition, reRecognition, singleRerecognition, and expandSelectedShape methods to use cv2.IMREAD_COLOR for decoding images. (PPOCRLabel.py, [1] [2] [3]
• Modified the saveRecResult method to decode images using cv2.IMREAD_COLOR for consistency with other methods. (PPOCRLabel.py, PPOCRLabel.pyL3498-R3502)
• Applied the same replacement in the run method of libs/autoDialog.py to maintain uniformity across the codebase. (libs/autoDialog.py, libs/autoDialog.pyL45-R45)

[Copilot]

Pull Request Overview

This PR replaces hardcoded decode flags in cv2.imdecode calls with the descriptive cv2.IMREAD_COLOR constant to improve readability and align with OpenCV best practices.

• Swap magic number 1 with cv2.IMREAD_COLOR across image-loading methods.
• Ensure consistent decode behavior in both PPOCRLabel.py and libs/autoDialog.py.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
libs/autoDialog.py	Replaced 1 with cv2.IMREAD_COLOR in run image decode
PPOCRLabel.py	Updated several methods (loadFile, reRecognition, singleRerecognition, expandSelectedShape, saveRecResult) to use cv2.IMREAD_COLOR

Comments suppressed due to low confidence (1)

PPOCRLabel.py:3502

• The original code used -1 (which corresponds to cv2.IMREAD_UNCHANGED) to preserve alpha channels; switching to cv2.IMREAD_COLOR now discards transparency information. If you need to keep alpha, use cv2.IMREAD_UNCHANGED instead of cv2.IMREAD_COLOR.

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