Detect rotation shift between two images

Calculates the rotation shift between two sequential images using either cross-correlation or phase correlation methods.

Usage

estimate_rotation_shift(
  img1,
  img2,
  cor.type = "phase",
  fixed.depth.pixel = c(1000, 4000),
  fixed.width = NULL,
  select.layer = NULL
)

Arguments

img1

Reference image (3-channel RGB)

img2

Subsequent image to compare (3-channel RGB)

cor.type

Correlation type: "ccf" (cross) or "phase" (frequency domain)

fixed.depth.pixel

Depth range to analyze c(start, end)

fixed.width

Width of analysis region in pixels

select.layer

Integer. Specifies which layer to use if the input is a multi-band image. Default is `NULL`.

Value

Vector of shifts (x,y) in pixels

Examples

img1 = seg_Oulanka2023_Session01_T067
img2 = seg_Oulanka2023_Session03_T067
y.lag = estimate_rotation_shift(img1,img2,"phase")
#> Warning: Warning in RotShiftDet: Images differ in size by -17 x 0 pixels