Update README.md

README.md

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 <!-- Description -->
 
 ### Canny Edge
-<!-- Description -->
+![canny](thumbnails/stability-clora-canny-thumbnail.jpeg)
+Canny Edge Detection is an image processing technique that identifies abrupt changes in intensity to highlight edges in an image.
+
+This Control-LoRA uses the edges from an image to guide the generation.
 
 ### MiDaS and ClipDrop Depth
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+![depth](thumbnails/stability-clora-depth-thumbnail.jpeg)
 
 ### Photograph and Sketch Colorizer
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+![photograph colorizer](thumbnails/stability-clora-colorize_photo-thumbnail.jpeg) ![sketch colorizer](thumbnails/stability-clora-colorize_sketch-thumbnail.jpeg)
+These two Control-LoRAs can be used to colorize images.
+
+The first is designed to colorize black and white photographs.
+
+The second is designed to color in sketches input as a white-on-black image (either hand-drawn, or created with a `SoftEdge_PIDI` model).
 
 ### Revision
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+![revision](thumbnails/stability-clora-revision-thumbnail.jpeg)
+Revision is a novel approach of using images to prompt SDXL.
+
+It uses pooled CLIP embeddings to produce images conceptually similar to the input. It can be used either in addition, or to replace text prompts.
+
+Revision also includes a blending function for combining multiple image or text concepts, as either positive or negative prompts.