brief introduction

TE153 grayscale test card is a commonly used camera test card, mainly used for testing grayscale; This card is used in conjunction with transmissive light boxes such as CC5100/3100, HC5100/3100, and DNP transmissive light boxes, and is widely used in the field of surveillance camera testing.

Dimensions: Internal 240 × 180mm, External 320 × 290mm

Two 11 degree grayscale bars are arranged in opposite directions on a gray background (D=0.56), with the grayscale bars marked on a logarithmic scale.

Grayscale density: Gamma=0.45

Transmittance value (brightness): Gamma=2.2, which is exactly the inverse of Gamma=0.45.

The output signal of an optimal gamma corrected camera produces two opposite 11 degree linear step signals. The contrast range of grayscale is 44:1.

11 degree grayscale value

The density value is based on the white part of the zebra stripes. Two black squares and one white square are located in the middle of two grayscale bars, and the density of the black squares is D>3.0 (transmittance<0.1%). The density of the white square is D=0.05 (transmittance=89.9%).