Isophotal analysis for the mock galaxy with ID= 547293. The top right panel displays the original mock galaxy, while the top left panel illustrates the ellipse fitting process. In the bottom right panel, we present the ellipticity (ϵ) as a function of the semimajor axis of the ellipses; the red dashed line marks the projected bar length. The horizontal green dashed lines show the PA of the bar and disk, which is close to zero.The bottom left panel shows the PA of the ellipses as a function of the semimajor axis of the ellipses. Here the red dashed line indicates the inner bar region adopted to calculate the mean PA of the bar.