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# embeddings-sort
-This program can sort images such that ones with similar motives are close together. This is accomplished by using [AI](https://github.com/minimaxir/imgbeddings) to extract the meaning of the image, and then approximating a travelling-salesperson-tour through all of them.
+This program can sort images such that ones with similar content are close together. This is accomplished by using AI to extract the meaning of the image, and then approximating a travelling-salesperson-tour through all of them.
As a bonus feature, this program can also sort the images by hue, brightness or color, though the results for this could be improved by using a less generalized algorithm.
The sorting can be accessed by letting the progam print the image paths in order, or by copying/symlinking the images into a new directory.
@@ -11,7 +11,7 @@ Detailed usage:
Usage: embeddings-sort [OPTIONS] [IMAGES]...
Arguments:
- [IMAGES]...
+ [IMAGES]...
Options:
-e, --embedder <EMBEDDER> Characteristic to sort by [default: content-angular-distance] [possible values: brightness, hue, color, content-euclidean, content-angular-distance, content-manhatten]
@@ -21,7 +21,8 @@ Options:
-0, --stdout0 Write sorted paths into stdout, null-separated. Overrides -c
-b, --benchmark Output total tour length to stderr
--tsp-approx <TSP_APPROX> Algorithm for TSP approximation. Leave as default if unsure [default: christofides] [possible values: mst-dfs, christofides]
- -r <REFINE> Number of 2-Opt refinement steps. Has quickly diminishing returns [default: 3]
+ -r <REFINE> Number of 2-Opt refinement steps. Has quickly diminishing returns [default: 5]
+ --no-rotate Don't try to improve result by rotating the output path such that less emphasis is put on the similarity of the first and last image
-i, --ignore-errors Ignore failed embeddings
--hash-seed <HASH_SEED> Seed for hashing. Random by default
-h, --help Print help
@@ -30,7 +31,7 @@ Options:
## Insides
The christofides implementation uses an approximated min-weight matching algorithm, which may be non-ideal, though I haven't benchmarked how much of a difference it makes (mainly due to the implementation complexity of an exact algorithm, which would also increase the implementations complexity from O(n²) to O(n³) where n is the number of given images).
-The 2-Opt refinement algorithm uses a doubly linked list with implicit iteration order to be able to do 2-Opt swaps in O(1), bringing a 2-Opt iteration to O(n²) complexity.
+The 2-Opt refinement algorithm uses a doubly linked list with implicit iteration order to be able to do 2-Opt swaps in O(1), bringing a 2-Opt iteration to O(n²) complexity. Unless `--no-rotate` is given, the calculated path is rotated in-between 2-Opt iterations such that the longest edge is between the first and the last image - as this edge is of no importance for the output of the algorithm, this improves output quality, though it does not improve the output according to the TSP problem formulation.
## Compatibility
`embeddings-sort` has, at some point, worked on both linux and windows.