Introduction to Resolution Comprehensive Test Card

The resolution comprehensive test card YE 095 is used for general visual evaluation of electronic cameras. The density of the four grayscale bars in the test card gradually increases from D=0.15 to D=1.35 (contrast ratio 11:1) with a quantitative increase of D=0.15. The contrast of the white area in the image (transmittance=100%, D=0) is 22:1. The density of the gray area around the white area is D ≈ 0.25 (transmittance=57%).

Instructions for using the resolution comprehensive test card

The circular chart in the test card can provide a rough evaluation of linear scanning performance. The 200 line grating distributed throughout the card can monitor linear distortion in both horizontal and vertical directions. The distance between the white and black lines should be equal.

By using an oscilloscope with a line selector switch, a vertical wedge-shaped grating can achieve frequency response of modulation depth. The signal from the 200 pole can be used as a reference value. Wedge gratings can further achieve visual evaluation of resolution limits. In addition, the effects of cross color interference, notch filters, and makeup filters can also be observed.

The horizontal bars above and below the grayscale bar transmit transmission characteristic information in the mid frequency range (fast movement). Perhaps using grayscale bars to roughly evaluate the acceptance of semitones; Due to the influence of the surrounding white areas, it is impossible to obtain exact results.

The four diagonal lines in the grid composed of grayscale bars can be used to detect the feature of line intersection. The stepped reception of lines represents paired lines.