I3A/ISO 12233 分辨率測試圖卡

此測試板專為測試電子靜態圖片相機的分辨率而設計。可以使用此測試板來量測視覺分辨率、限制分辨率，並提供取得空間頻率回應(SFR)資料的簡易方法。圖卡上的特徵介於100至2000 LW/PH (每個圖片高度的線寬)之間，0.1mm的分辨率對應於最細的特徵。此外，還包括100-1000個線性方波掃描、斜線、條形、方形及棋盤圖案(用於影像壓縮作品)。此卡提供三種尺寸，以因應多種相機與鏡頭的需求。

The 1X and 2X Enhanced Digital Camera targets are based on the ISO-12223 chart but have additional information. They can be used to determine reflective light resolution and imaging characteristics of digital still camera systems.

Test chart elements include:

• Black border for defining active area
• Center dual frequency zone plate for focusing purposes
• 100-600 LW/PH and 500-2000 LW/PH hyperbolic wedges for measuring center and corner, horizontal and vertical visual resolution.
• 100-1000 line square wave sweeps for measuring vertical and horizontal limiting resolution
• Slightly slanted (@ 5 degrees) large black bars for measuring center horizontal and vertical SFR
• 45 degree diagonal black square for measuring diagonal SFR
• Slightly slanted small black squares for measuring vertical and horizontal SFR at extreme corners of field
• Slightly slanted H-shaped bars for SFR at far sides of field
• Slightly slanted square wave bursts for horizontal and vertical aliasing ratios
• Slightly slanted thin long vertical line and horizontal line for checking scan linearity
• 100-1000 LW/PH short black lines for vertical and horizontal pulse responses
• Circle with cross and X for observation of scanning non-linearities
• Checkerboard patterns for image compression artifacts

In addition to all of the ISO-12233 chart features, the enhanced digital camera target offers:

• Extended resolution ranges. Standard center chart measures to 4,000 LW/ph and corner wedges measure to 2,000 LW/ph
• Two Star Sector targets
• Dark gray (8% R) 5° square on medium gray background (32% R) for reduced contrast SFR analysis
• 5° slanted bar (5 x 30mm) for 1X chart
• Short black lines (square wave sweep) 1200 to 3,000 LW/ph
• Slanted short black lines (tilted square wave bursts) 1200 to 3,000 LW/ph