move img captio gui over to ed2

scripts/img_caption_gui.py

@@ -0,0 +1,161 @@
+# Python GUI tool to manually caption images for machine learning.
+# A sidecar file is created for each image with the same name and a .txt extension.
+#
+# [control/command + o] to open a folder of images.
+# [page down] and [page up] to go to next and previous images. Hold shift to skip 10 images.
+# [shift + home] and [shift + end] to go to first and last images.
+# [shift + delete] to move the current image into a '_deleted' folder.
+# [escape] to exit the app.
+
+import sys
+import tkinter as tk
+from tkinter import filedialog
+from PIL import Image, ImageTk
+from pathlib import Path
+
+IMG_EXT = ["jpg", "jpeg", "png", "webp"]
+
+class CaptionedImage():
+    def __init__(self, image_path):
+        self.base_path = image_path.parent
+        self.path = image_path
+    
+    def caption_path(self):
+        return self.base_path / (self.path.stem + '.txt')
+
+    def read_caption(self):
+        caption_path = self.caption_path()
+        if caption_path.exists():
+            with open(caption_path, 'r', encoding='utf-8', newline='') as f:
+                return f.read()
+        return ''
+
+    def write_caption(self, caption):
+        caption_path = self.caption_path()
+        with open(str(caption_path), 'w', encoding='utf-8', newline='') as f:
+            f.write(caption)
+    
+    # sort
+    def __lt__(self, other):
+        return str(self.path).lower() < str(other.path).lower()
+
+class ImageView(tk.Frame):
+
+    def __init__(self, root):
+        tk.Frame.__init__(self, root)
+
+        self.root = root
+        self.base_path = None
+        self.images = []
+        self.index = 0
+
+        # image
+        self.image_frame = tk.Frame(self)
+        self.image_label = tk.Label(self.image_frame)
+        self.image_label.place(relx=0.5, rely=0.5, anchor=tk.CENTER)
+        self.image_frame.pack(expand=True, fill=tk.BOTH, side=tk.LEFT)
+        
+        # caption field
+        self.caption_frame = tk.Frame(self)
+        self.caption_field = tk.Text(self.caption_frame, wrap="word", width=50)
+        self.caption_field.pack(expand=True, fill=tk.BOTH)
+        self.caption_frame.pack(fill=tk.Y, side=tk.RIGHT)
+
+    def open_folder(self):
+        dir = filedialog.askdirectory()
+        if not dir:
+            return
+        self.base_path = Path(dir)
+        if self.base_path is None:
+            return
+        self.images.clear()
+        for ext in IMG_EXT:
+            for file in self.base_path.glob(f'*.{ext}'):
+                self.images.append(CaptionedImage(file))
+        self.images.sort()
+        self.update_ui()
+    
+    def store_caption(self):
+        txt = self.caption_field.get(1.0, tk.END)
+        txt = txt.replace('\r', '').replace('\n', '').strip()
+        self.images[self.index].write_caption(txt)
+        
+    def set_index(self, index):
+        self.index = index % len(self.images)
+
+    def go_to_image(self, index):
+        if len(self.images) == 0:
+            return
+        self.store_caption()
+        self.set_index(index)
+        self.update_ui()
+
+    def next_image(self):
+        self.go_to_image(self.index + 1)
+
+    def prev_image(self):
+        self.go_to_image(self.index - 1)
+
+    # move current image to a "_deleted" folder
+    def delete_image(self):
+        if len(self.images) == 0:
+            return
+        img = self.images[self.index]
+
+        trash_path = self.base_path / '_deleted'
+        if not trash_path.exists():
+            trash_path.mkdir()
+        img.path.rename(trash_path / img.path.name)
+        caption_path = img.caption_path()
+        if caption_path.exists():
+            caption_path.rename(trash_path / caption_path.name)
+        del self.images[self.index]
+        self.set_index(self.index)
+        self.update_ui()
+    
+    def update_ui(self):
+        if (len(self.images)) == 0:
+            self.filename.set('')
+            self.caption_field.delete(1.0, tk.END)
+            self.image_label.configure(image=None)
+            return
+        img = self.images[self.index]
+        # filename
+        title = self.images[self.index].path.name if len(self.images) > 0 else ''
+        self.root.title(title + f' ({self.index+1}/{len(self.images)})')
+        # caption
+        self.caption_field.delete(1.0, tk.END)
+        self.caption_field.insert(tk.END, img.read_caption())
+        # image
+        img = Image.open(self.images[self.index].path)
+        
+        # scale the image to fit inside the frame
+        w = self.image_frame.winfo_width()
+        h = self.image_frame.winfo_height()
+        if img.width > w or img.height > h:
+            img.thumbnail((w, h))
+        photoImage = ImageTk.PhotoImage(img)
+        self.image_label.configure(image=photoImage)
+        self.image_label.image = photoImage
+    
+if __name__=='__main__':
+    root = tk.Tk()
+    root.geometry('1200x800')
+    root.title('Image Captions')
+
+    if sys.platform == 'darwin':
+        root.bind('<Command-o>', lambda e: view.open_folder())
+    else:
+        root.bind('<Control-o>', lambda e: view.open_folder())
+    root.bind('<Escape>', lambda e: root.destroy())
+    root.bind('<Prior>', lambda e: view.prev_image())
+    root.bind('<Next>', lambda e: view.next_image())
+    root.bind('<Shift-Prior>', lambda e: view.go_to_image(view.index - 10))
+    root.bind('<Shift-Next>', lambda e: view.go_to_image(view.index + 10))
+    root.bind('<Shift-Home>', lambda e: view.go_to_image(0))
+    root.bind('<Shift-End>', lambda e: view.go_to_image(len(view.images) - 1))
+    root.bind('<Shift-Delete>', lambda e: view.delete_image())
+
+    view = ImageView(root)
+    view.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
+    root.mainloop()