Dead Leaves Target – Colored YE0276 Texture Loss Analysis Resolution Test Chart
The dead leaves target is mainly used to test the texture details and the effect of denoising on the texture details.
YE0276 includes the dead leaves target and the hypotenuse part, which is convenient for testing MTF and texture loss at the same time, and it is convenient for the test species to balance the two debugging directions.
When the texture loss part and the hypotenuse part meet certain requirements, the performance of the camera is better.
The YE0276 consists of five items:
• Background
All following items are placed on a neutral gray background with a gray level of 18%.
• Registration Marks
Four registration marks are placed on the test chart, one in each corner. These marks are used for the automatic registration in analysis software, e.g. the iQstest.
• Gray Patches
The chart contains 16 gray patches. The reflection of these patches is linear spaced between the brightest patch and the darkest patch.
• Dead Leaves Pattern
The main item is the so called Dead Leaves pattern. This pattern consists of circles stacked on top of each other with a known probability distribution of position, radius and digital value of channel R, G and B. The contrast is limited to 20% of the maximum achievable contrast.
• Slanted Edges
Four slanted edges with different, reduced modulation are arranged around the Dead Leaves pattern. Two of them in vertical orientation and the other two in horizontal orientation.
For the software based analysis of images, captured of the YE0276, you can use the iQstest. This software will provide the Spatial Frequency Response (SFR) measured on this target.
Recommended usage:
We recommend to reproduce the chart with the device under test in that way, that the chart fills not more
than 1/3 of the image height.
In case this chart fills 1/3 of the image height it can be used for cameras with a sampling rate of up to 30
Megapixels.
Suzie Xia
International Sales Dept.
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Shenzhen ThreeNH Technology Co., Ltd
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Dead Leaves Target – Colored YE0276 Texture Loss Analysis Resolution Test Chart Images
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