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authorNick White <git@njw.name>2019-05-13 17:31:26 +0100
committerNick White <git@njw.name>2019-05-13 17:31:26 +0100
commita931288d3e813d069a2b6b010e5af4d73d308cf2 (patch)
tree390efabf90d484568e5ed12bd4ed0603e40dfd48 /preproc/cmd/cleanup/main.go
parent1ac5035ef55d2f97d1b98a309d83a09a84395e07 (diff)
Rename cleanup package to preproc, and add basic cmd version
Diffstat (limited to 'preproc/cmd/cleanup/main.go')
-rw-r--r--preproc/cmd/cleanup/main.go62
1 files changed, 62 insertions, 0 deletions
diff --git a/preproc/cmd/cleanup/main.go b/preproc/cmd/cleanup/main.go
new file mode 100644
index 0000000..7ea0c84
--- /dev/null
+++ b/preproc/cmd/cleanup/main.go
@@ -0,0 +1,62 @@
+package main
+
+// TODO: add minimum size variable (default ~30%?)
+// TODO: make into a small library
+// TODO: have the integral image specific stuff done by interface functions
+
+import (
+ "flag"
+ "fmt"
+ "image"
+ "image/draw"
+ _ "image/jpeg"
+ "image/png"
+ "log"
+ "os"
+
+ "rescribe.xyz/go.git/binarize"
+ "rescribe.xyz/go.git/preproc"
+)
+
+func main() {
+ flag.Usage = func() {
+ fmt.Fprintf(os.Stderr, "Usage: cleanup [-t thresh] [-w winsize] inimg outimg\n")
+ flag.PrintDefaults()
+ }
+ wsize := flag.Int("w", 5, "Window size for mask finding algorithm.")
+ thresh := flag.Float64("t", 0.05, "Threshold for the proportion of black pixels below which a window is determined to be the edge.")
+ flag.Parse()
+ if flag.NArg() < 2 {
+ flag.Usage()
+ os.Exit(1)
+ }
+
+ f, err := os.Open(flag.Arg(0))
+ defer f.Close()
+ if err != nil {
+ log.Fatalf("Could not open file %s: %v\n", flag.Arg(0), err)
+ }
+ img, _, err := image.Decode(f)
+ if err != nil {
+ log.Fatalf("Could not decode image: %v\n", err)
+ }
+ b := img.Bounds()
+ gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
+ draw.Draw(gray, b, img, b.Min, draw.Src)
+
+ integral := binarize.Integralimg(gray)
+
+ lowedge, highedge := preproc.Findedges(integral, *wsize, *thresh)
+
+ clean := preproc.Wipesides(gray, lowedge, highedge)
+
+ f, err = os.Create(flag.Arg(1))
+ if err != nil {
+ log.Fatalf("Could not create file %s: %v\n", flag.Arg(1), err)
+ }
+ defer f.Close()
+ err = png.Encode(f, clean)
+ if err != nil {
+ log.Fatalf("Could not encode image: %v\n", err)
+ }
+}