Reflective Color Spilled Coins (Dead Leaves) Test Chart for measuring texture sharpness

The Color Spilled Coins test chart (a variant of the Dead Leaves test chart) for measuring texture sharpness has several advantages over older Dead Leaves charts. Key features:

• The Scattered Coins pattern in the central region is almost perfectly scale-invariant (unlike conventional dead leaves tet charts), enhancing the accuracy and robustness of MTF measurements so they correlate well with other methods (such as the slanted-edge) for RAW images (which have no nonuniform or nonlinear processing).
• Maximum contrast range is 3:1, as called for in the CPIQ Phase 3 draft Texture Blur Metric draft specification.
• It is more uniform, i.e., is more shift-invariant than other Dead Leaves charts.
• It contains slanted edges (2:1 and 4:1 contrast) for convenient comparisons with the dead leaves pattern.
• The gray area to the left and right of the dead leaves pattern has the same mean density as the dead leaves pattern, allowing it to be used for effective noise PSD removal using the McElvain et. al. technique.
• Registration marks and 16 grayscale patches are included. The linear levels used to create the grayscale patches are 0 through 255 in steps of 17 (same as the Siemens Star chart in the draft of the upcoming ISO 12233 standard).

Remark: We support Any customized test charts only if you have high resolution image and size.

ThreeNH is a group, including four companies as following:

Shenzhen 3nh Technology Co., Ltd

Shenzhen Sine Image Technology Co., Ltd

Shenzhen Tilo Technology Co., Ltd
COLORCONTROLLER HK LIMITED

3nh(ThreeNH) & TILO have 8 product lines to manufacture different kinds of models Spectrophotometer,Colorimeter,Gloss Meter,Color Light Box,Resolution Test Chart with high quality and high accuracy.

Technological innovation is the source for 3nh(ThreeNH) & TILO development. 3nh(ThreeNH) & TILO have a high educated R&D team striving for perfection, advanced technology and teamwork.

Quality is a very important part of our company, and every instrument of 3nh(ThreeNH) & TILO will be checked by our QC department. Only QC pass, all instruments will go to warehouse for shipment.

3nh adheres to “people-oriented, customer first, technological innovation, sustainable development” business philosophy to meet customer demand continuously, to create value for customers and to achieve win-win situation and common development.

Service Concept:

* Focus on color for 20 years to make it better.

* Integrity wins the world.

* Continuous research and development innovation for excellence.

* Constantly create value for customers.