Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. The internal structure of the aligned 2CCD camera. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Flowchart of aligning a 2CCD camera. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. The principle of corresponding points selection. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Correction of the deviation of pixel position. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Schematic diagram of the experimental system. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Four captured fringe pattern images. The top two horizontal and vertical fringe pattern images are from the infrared (IR) channel, and the bottom two horizontal and vertical fringe pattern images are from the visible channel. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Absolute phase maps in both directions by using visible fringe patterns. (a) Vertical absolute phase map calculated from the horizontal sinusoidal fringe patterns, (b) the horizontal absolute phase map calculated from the vertical sinusoidal fringe patterns, (c) the profile of (a) along the column 512, and (d) the profile of (b) along the row 384. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Subpixel deviation along the vertical direction between the IR channel and the visible channel. (a) Deviation before alignment and (b) deviation after alignment (unit: pixel). Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Subpixel deviation along the horizontal direction between the IR channel and the visible channel. (a) Deviation before alignment and (b) deviation after alignment (unit: pixel). Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. One row of subpixel deviation in horizontal absolute phase map before and after alignments (unit: pixel). Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. One column of subpixel deviation in vertical absolute phase map before and after alignments (unit: pixel). Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Captured images of the alignment plate: (a) visible image and (b) IR image. Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE

Date of download: 6/24/2016 Copyright © 2016 SPIE. All rights reserved. Center positions of ring markers in the two captured images. Green asterisks show the extracted ring center in the visible image, and red points denote the extracted ring center in the IR image. (a) Before alignment, (b) after alignment, (c) enlarged view of four markers in the rectangle of (a), and (d) enlarged view of four markers in the rectangle of (b). Figure Legend: From: Pixel-to-pixel correspondence alignment method of a 2CCD camera by using absolute phase map Opt. Eng. 2015;54(6): doi: /1.OE