Added --embiggen_strength option

ldm/generate.py

@@ -288,8 +288,9 @@ class Generate:
             strength         = None,
             init_color       = None,
             # these are specific to embiggen (which also relies on img2img args)
-            embiggen       =    None,
-            embiggen_tiles =    None,
+            embiggen          = None,
+            embiggen_tiles    = None,
+            embiggen_strength = None,
             # these are specific to GFPGAN/ESRGAN
             gfpgan_strength=    0,
             facetool         = None,
@@ -344,6 +345,7 @@ class Generate:
            perlin                          // optional 0-1 value to add a percentage of perlin noise to the initial noise
            embiggen                        // scale factor relative to the size of the --init_img (-I), followed by ESRGAN upscaling strength (0-1.0), followed by minimum amount of overlap between tiles as a decimal ratio (0 - 1.0) or number of pixels
            embiggen_tiles                  // list of tiles by number in order to process and replace onto the image e.g. `0 2 4`
+           embiggen_strength               // strength for embiggen. 0.0 preserves image exactly, 1.0 replaces it completely
 
         To use the step callback, define a function that receives two arguments:
         - Image GPU data
@@ -485,6 +487,7 @@ class Generate:
                 perlin=perlin,
                 embiggen=embiggen,
                 embiggen_tiles=embiggen_tiles,
+                embiggen_strength=embiggen_strength,
                 inpaint_replace=inpaint_replace,
                 mask_blur_radius=mask_blur_radius,
                 safety_checker=checker,
@@ -634,6 +637,8 @@ class Generate:
             # fetch the metadata from the image
             generator = self.select_generator(embiggen=True)
             opt.strength  = 0.40
+            if opt.embiggen_strength is not None:
+                opt.strength = embiggen_strength
             print(f'>> Setting img2img strength to {opt.strength} for happy embiggening')
             generator.generate(
                 prompt,
@@ -649,6 +654,7 @@ class Generate:
                 height      = opt.height,
                 embiggen    = opt.embiggen,
                 embiggen_tiles = opt.embiggen_tiles,
+                embiggen_strength = opt.embiggen_strength,
                 image_callback = callback,
             )
         elif tool == 'outpaint':

ldm/invoke/args.py

@@ -286,6 +286,8 @@ class Args(object):
             switches.append(f'--embiggen {" ".join([str(u) for u in a["embiggen"]])}')
         if a['embiggen_tiles']:
             switches.append(f'--embiggen_tiles {" ".join([str(u) for u in a["embiggen_tiles"]])}')
+        if a['embiggen_strength']:
+            switches.append(f'--embiggen_strength {a["embiggen_strength"]}')
 
         # outpainting parameters
         if a['out_direction']:
@@ -915,6 +917,13 @@ class Args(object):
             help='For embiggen, provide list of tiles to process and replace onto the image e.g. `1 3 5`.',
             default=None,
         )
+        postprocessing_group.add_argument(
+            '--embiggen_strength',
+            '-embiggen_strength',
+            type=float,
+            help='The strength of the embiggen img2img step, defaults to 0.4',
+            default=0.4,
+        )
         special_effects_group.add_argument(
             '--seamless',
             action='store_true',

ldm/invoke/server.py

@@ -30,6 +30,7 @@ def build_opt(post_data, seed, gfpgan_model_exists):
     # however, this code is here against that eventuality
     setattr(opt, 'embiggen', None)
     setattr(opt, 'embiggen_tiles', None)
+    setattr(opt, 'embiggen_strength', None)
 
     setattr(opt, 'facetool_strength', float(post_data['facetool_strength']) if gfpgan_model_exists else 0)
     setattr(opt, 'upscale', [int(post_data['upscale_level']), float(post_data['upscale_strength'])] if post_data['upscale_level'] != '' else None)