Image Rotation Center Control for Cropped Images
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Solution Overview
Problem
Existing information processing devices cannot rotate cropped images as desired, as they rotate both cropped and original images about the same center, leading to unintended axis rotation, and lack precision in rotating images displayed with slight tilt to a normal position.
Innovation Solution
An information processing device with a display and operation device that allows users to rotate images by setting a cropping frame's center for rotation, enabling rotation about the image or cropping frame's center, and adjusting the angle of tilt with a slider for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same rotation method is used for both cropped images and original images, then the rotation process is simple and unified, but the cropped image cannot be rotated about its own center as expected by the user
Solution Approach 1:
The patent segments the rotation operation into two distinct modes: one for rotating the original image about its center, and another for rotating the cropped image about the cropping frame center. This segmentation allows each rotation type to have its own specific behavior, resolving the contradiction between unified simplicity and user-expected behavior.
Solution Approach 2:
The system dynamically determines the rotation center based on the current display state. When a cropping frame is displayed, the rotation center is set to the cropping frame center; otherwise, it is set to the original image center. This dynamic adaptation allows the same rotation interface to serve multiple purposes correctly.
2Stability of the object's composition
If the image is rotated about the center of the original image, then the rotation is consistent with the original image, but the cropped image revolves about an axis outside the cropped image
Solution Approach 1:
The rotation center is dynamically selected based on whether a cropping frame is present. When cropping is active, the rotation center shifts to the cropping frame center, ensuring the cropped image rotates about its own center rather than the original image center, preventing unwanted revolution.
3Device complexity
If only fixed angle rotation is provided, then the rotation operation is simple, but the image displayed with slight tilt cannot be precisely aligned to normal position
Solution Approach 1:
The patent changes the rotation angle parameter from fixed discrete values to continuously adjustable values. By introducing a slider that allows arbitrary angle adjustment within a range (e.g., -15 to +15 degrees), the system enables precise alignment of slightly tilted images while maintaining operational simplicity through the visual feedback mechanism.
Data Source
AI summary
A non-transitory storage medium stores instructions executable by an information processing device including an operation device and a display. The instructions cause the information processing device to: display a first image; display a cropping frame for cropping of the first image when the operation device accepts a user operation for displaying the cropping frame in a state in which the first image is displayed; rotate the first image about a center of the cropping frame when the operation device accepts a user operation for rotating the first image in a state in which the first image and the cropping frame are displayed; and rotate the first image about a center of the first image when the operation device accepts a user operation for rotating the first image in a state in which the first image is displayed, and the cropping frame is not displayed.