Operations to manipulate or combine multiple frames of an image. Details below.
image_animate(
image,
fps = 10,
delay = NULL,
loop = 0,
dispose = c("background", "previous", "none"),
optimize = FALSE
)
image_coalesce(image)
image_morph(image, frames = 8)
image_mosaic(image, operator = NULL)
image_flatten(image, operator = NULL)
image_average(image)
image_append(image, stack = FALSE)
image_apply(image, FUN, ...)
image_montage(
image,
geometry = NULL,
tile = NULL,
gravity = "Center",
bg = "white",
shadow = FALSE
)magick image object returned by image_read() or image_graph()
frames per second. Ignored if delay is not NULL.
delay after each frame, in 1/100 seconds.
Must be length 1, or number of frames. If specified, then fps is ignored.
how many times to repeat the animation. Default is infinite.
a frame disposal method from dispose_types()
optimize the gif animation by storing only the differences
between frames. Input images must be exactly the same size.
number of frames to use in output animation
string with a composite operator from compose_types()
place images top-to-bottom (TRUE) or left-to-right (FALSE)
a function to be called on each frame in the image
additional parameters for FUN
a geometry string that defines the size the individual thumbnail images, and the spacing between them.
a geometry string for example "4x5 with limits on how the tiled images are to be laid out on the final result.
a gravity direction, if the image is smaller than the frame, where in the frame is the image to be placed.
a background color string
enable shadows between images
For details see Magick++ STL documentation. Short descriptions:
image_animate coalesces frames by playing the sequence and converting to gif format.
image_morph expands number of frames by interpolating intermediate frames to blend into each other when played as an animation.
image_mosaic inlays images to form a single coherent picture.
image_montage creates a composite image by combining frames.
image_flatten merges frames as layers into a single frame using a given operator.
image_average averages frames into single frame.
image_append stack images left-to-right (default) or top-to-bottom.
image_apply applies a function to each frame
The image_apply function calls an image function to each frame and joins
results back into a single image. Because most operations are already vectorized
this is often not needed. Note that FUN() should return an image. To apply other
kinds of functions to image frames simply use lapply, vapply, etc.
# Combine images
logo <- image_read("https://jeroen.github.io/images/Rlogo.png")
oldlogo <- image_read("https://jeroen.github.io/images/Rlogo-old.png")
# Create morphing animation
both <- image_scale(c(oldlogo, logo), "400")
image_average(image_crop(both))
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 PNG 400 304 sRGB TRUE 0 118x118
image_animate(image_morph(both, 10))
#> # A tibble: 12 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 gif 400 304 sRGB TRUE 0 118x118
#> 2 gif 400 304 sRGB TRUE 0 118x118
#> 3 gif 400 304 sRGB TRUE 0 118x118
#> 4 gif 400 304 sRGB TRUE 0 118x118
#> 5 gif 400 304 sRGB TRUE 0 118x118
#> 6 gif 400 304 sRGB TRUE 0 118x118
#> 7 gif 400 304 sRGB TRUE 0 118x118
#> 8 gif 400 304 sRGB TRUE 0 118x118
#> 9 gif 400 304 sRGB TRUE 0 118x118
#> 10 gif 400 304 sRGB TRUE 0 118x118
#> 11 gif 400 304 sRGB TRUE 0 118x118
#> 12 gif 400 304 sRGB TRUE 0 72x72
# Create thumbnails from GIF
banana <- image_read("https://jeroen.github.io/images/banana.gif")
length(banana)
#> [1] 8
image_average(banana)
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 365 360 sRGB TRUE 0 72x72
image_flatten(banana)
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 365 360 sRGB TRUE 0 72x72
image_append(banana)
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 2920 360 sRGB TRUE 0 72x72
image_append(banana, stack = TRUE)
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 365 2880 sRGB TRUE 0 72x72
# Append images together
wizard <- image_read("wizard:")
image_append(image_scale(c(image_append(banana[c(1,3)], stack = TRUE), wizard)))
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 730 720 sRGB TRUE 0 72x72
image_composite(banana, image_scale(logo, "300"))
#> # A tibble: 8 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 GIF 365 360 sRGB TRUE 0 72x72
#> 2 GIF 365 360 sRGB TRUE 0 72x72
#> 3 GIF 365 360 sRGB TRUE 0 72x72
#> 4 GIF 365 360 sRGB TRUE 0 72x72
#> 5 GIF 365 360 sRGB TRUE 0 72x72
#> 6 GIF 365 360 sRGB TRUE 0 72x72
#> 7 GIF 365 360 sRGB TRUE 0 72x72
#> 8 GIF 365 360 sRGB TRUE 0 72x72
# Break down and combine frames
front <- image_scale(banana, "300")
background <- image_background(image_scale(logo, "400"), 'white')
frames <- image_apply(front, function(x){image_composite(background, x, offset = "+70+30")})
image_animate(frames, fps = 10)
#> # A tibble: 8 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 gif 400 310 sRGB TRUE 0 72x72
#> 2 gif 400 310 sRGB TRUE 0 72x72
#> 3 gif 400 310 sRGB TRUE 0 72x72
#> 4 gif 400 310 sRGB TRUE 0 72x72
#> 5 gif 400 310 sRGB TRUE 0 72x72
#> 6 gif 400 310 sRGB TRUE 0 72x72
#> 7 gif 400 310 sRGB TRUE 0 72x72
#> 8 gif 400 310 sRGB TRUE 0 72x72
# Simple 4x3 montage
input <- rep(logo, 12)
image_montage(input, geometry = 'x100+10+10', tile = '4x3', bg = 'pink', shadow = TRUE)
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 "" 600 372 sRGB FALSE 0 72x72
# With varying frame size
input <- c(wizard, wizard, logo, logo)
image_montage(input, tile = '2x2', bg = 'pink', gravity = 'southwest')
#> # A tibble: 1 × 7
#> format width height colorspace matte filesize density
#> <chr> <int> <int> <chr> <lgl> <int> <chr>
#> 1 "" 256 252 sRGB FALSE 0 72x72