Anamorphic Lens Aspect Marker Adjustment for Accurate Range Display
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Solution Overview
Problem
Conventional image pickup apparatuses using anamorphic lenses fail to accurately indicate the photographing range for videos with different aspect ratios, leading to potential errors in recognizing the cinemascope size video range when aspect markers are displayed.
Innovation Solution
The apparatus determines the type of lens mounted and adjusts the aspect markers displayed accordingly, ensuring that the correct aspect ratio markers are superimposed on the video, whether it is reduced or enlarged, to accurately represent the photographing range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the same aspect markers are displayed irrespective of the lens type or display method used, then the display system is simple, but the photographing range cannot be accurately indicated
Solution Approach 1:
The aspect markers are dynamically adjusted based on the lens type and display method being used. The system automatically changes the aspect ratio of displayed markers to match the actual photographing range, whether using a ×2.0 or ×1.3 anamorphic lens, and whether displaying the video reduced or enlarged. This dynamic adaptation resolves the contradiction by making the display system complex only when necessary for accuracy.
Solution Approach 2:
The system changes the aspect ratio parameter of the displayed markers according to the specific lens and display method configuration. For example, when using a ×2.0 lens with video reduction, markers show one aspect ratio, while with a ×1.3 lens or video enlargement, different aspect ratios are displayed. This parameter adjustment ensures accurate photographing range indication without requiring a completely different display system.
2Measurement precision
If video is reduced in horizontal direction by ×2.0 lens and displayed as is, then display is simple, but aspect markers do not accurately represent cinemascope size range
Solution Approach 1:
The system performs preliminary adjustment of aspect markers before display, calculating the correct aspect ratio based on the lens type and display method. This preliminary action ensures that markers accurately represent the cinemascope size range before the video is displayed, resolving the contradiction between display simplicity and marking accuracy.
3Measurement precision
If video is enlarged by video camera in horizontal direction, then photographing range can be confirmed, but aspect markers must be adjusted to avoid erroneous recognition
Solution Approach 1:
The system uses feedback from the enlargement process to automatically adjust the aspect markers. When the video camera enlarges the video in the horizontal direction, the system detects this and相应地 adjusts the markers to maintain accurate representation of the photographing range. This feedback mechanism resolves the contradiction by automating the adjustment process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents erroneous recognition of the photographing range by correctly displaying aspect markers that match the actual aspect ratio of the video, enhancing the accuracy of video range confirmation.
Implementation Method 1
uses an anamorphic optical system having different refractive powers between a horizontal direction and a vertical direction to reduce a video image having a wide angle of view, in the horizontal direction
Data Source
AI summary
An image pickup apparatus that prevents erroneous recognition of a photographing range when a video acquired using an anamorphic lens is displayed. A system controller determines a type of a lens mounted on a lens mounting section. When the type of the mounted lens is a first lens for scaling a video by a factor of 1/a in a horizontal direction, first aspect markers indicating an aspect ratio of M:N are displayed in a state superimposed on a first video acquired via the first lens. When the type of the mounted lens is a second lens for scaling the video by a factor of 1/b in the horizontal direction, second aspect markers indicating an aspect ratio of M′:N (M′=M×a/b) are displayed in a state superimposed on a second video acquired via the second lens.