app.py

# ------------------------------------------------------------------------------
# Copyright (c) 2023, Alaa lab, UC Berkeley. All rights reserved.
#
# Written by Yulu Gan.
# ------------------------------------------------------------------------------

from __future__ import annotations

import math
import cv2
import random
from fnmatch import fnmatch
import numpy as np

import gradio as gr
import torch
from PIL import Image, ImageOps
from diffusers import StableDiffusionInstructPix2PixPipeline

title = "InstructCV"

description = """
<p style='text-align: center'> Yulu Gan, Sungwoo Park, Alex Schubert, Ahmed Alaa <br>
<a href='https://huggingface.co/spaces/yulu2/InstructCV/' target='_blank'>Project Page</a> | <a href='https://arxiv.org' target='_blank'>Paper</a> | <a href='https://github.com' target='_blank'>Code</a></p>
Gradio demo for InstructCV: Instruction-Tuned Text-to-Image Diffusion Models As Vision Generalists. \n
You may upload any images you like and try to let the model do vision tasks following your intent. \n
Some examples: You could use "Segment the dog" for segmentation, "Detect the dog" for object detection, "Estimate the depth map of this image" for depth estimation, etc.
"""  # noqa


example_instructions = [
                        "Please help me detect Buzz.",
                        "Please help me detect Woody's face.",
                        "Create a monocular depth map.",
]

model_id = "alaa-lab/InstructCV"

def main():
    # pipe = StableDiffusionInstructPix2PixPipeline.from_pretrained(model_id, torch_dtype=torch.float16, safety_checker=None).to("cpu")
    pipe = StableDiffusionInstructPix2PixPipeline.from_pretrained(model_id, safety_checker=None).to("cuda")
    example_image = Image.open("imgs/example2.jpg").convert("RGB")
    

    def load_example(seed: int, randomize_seed:bool):
        example_instruction = random.choice(example_instructions)
        return [example_image, example_instruction] + generate(
            example_image,
            example_instruction,
            seed,
            0,
            text_cfg_scale,
            image_cfg_scale,
        )

    def generate(
        input_image: Image.Image,
        instruction: str,
        seed: int,
        randomize_seed:bool,
        text_cfg_scale: float,
        image_cfg_scale: float,
    ):
        seed = random.randint(0, 100000) if randomize_seed else seed
        width, height = input_image.size
        factor = 512 / max(width, height)
        factor = math.ceil(min(width, height) * factor / 64) * 64 / min(width, height)
        width = int((width * factor) // 64) * 64
        height = int((height * factor) // 64) * 64
        input_image = ImageOps.fit(input_image, (width, height), method=Image.Resampling.LANCZOS)
        
        if instruction == "":
            return [input_image]

        generator = torch.manual_seed(seed)
        edited_image = pipe(
            instruction, image=input_image,
            guidance_scale=text_cfg_scale, image_guidance_scale=image_cfg_scale,
            num_inference_steps=50, generator=generator,
        ).images[0]
        instruction_ = instruction.lower()
        
        if fnmatch(instruction_, "*segment*") or fnmatch(instruction_, "*split*") or fnmatch(instruction_, "*divide*"):
            input_image  = cv2.cvtColor(np.array(input_image), cv2.COLOR_RGB2BGR) #numpy.ndarray
            edited_image = cv2.cvtColor(np.array(edited_image), cv2.COLOR_RGB2GRAY)
            ret, thresh  = cv2.threshold(edited_image, 127, 255, cv2.THRESH_BINARY)
            img2         = input_image.copy()
            seed_seg     = np.random.randint(0,10000)
            np.random.seed(seed_seg)
            colors       = np.random.randint(0,255,(3))
            colors2      = np.random.randint(0,255,(3))
            contours,_   = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_NONE)
            edited_image = cv2.drawContours(input_image,contours,-1,(int(colors[0]),int(colors[1]),int(colors[2])),3)
            for j in range(len(contours)):
                edited_image_2 = cv2.fillPoly(img2, [contours[j]], (int(colors2[0]),int(colors2[1]),int(colors2[2])))
            img_merge = cv2.addWeighted(edited_image, 0.5,edited_image_2, 0.5, 0)
            edited_image  = Image.fromarray(cv2.cvtColor(img_merge, cv2.COLOR_BGR2RGB))
        
        if fnmatch(instruction_, "*depth*"):
            edited_image = cv2.cvtColor(np.array(edited_image), cv2.COLOR_RGB2GRAY)
            n_min    = np.min(edited_image)
            n_max    = np.max(edited_image)
    
            edited_image = (edited_image-n_min)/(n_max-n_min+1e-8)
            edited_image = (255*edited_image).astype(np.uint8)
            edited_image = cv2.applyColorMap(edited_image, cv2.COLORMAP_JET)
            edited_image = Image.fromarray(cv2.cvtColor(edited_image, cv2.COLOR_BGR2RGB))

        # text_cfg_scale   = 7.5
        # image_cfg_scale  = 1.5
        return [seed, text_cfg_scale, image_cfg_scale, edited_image]


    with gr.Blocks() as demo:
#         gr.HTML("""<h1 style="font-weight: 900; margin-bottom: 7px;">
#    InstructCV: Towards Universal Text-to-Image Vision Generalists
# </h1>""")
        gr.Markdown("<h1 style='text-align: center; margin-bottom: 1rem'>" + title + "</h1>")
        gr.Markdown(description)
        with gr.Row():
            with gr.Column(scale=1.5, min_width=100):
                generate_button = gr.Button("Generate result")
            with gr.Column(scale=1.5, min_width=100):
                load_button = gr.Button("Load example")
            with gr.Column(scale=3):
                instruction = gr.Textbox(lines=1, label="Instruction", interactive=True)

        with gr.Row():
            input_image = gr.Image(label="Input Image", type="pil", interactive=True)
            edited_image = gr.Image(label=f"Output Image", type="pil", interactive=False)
            input_image.style(height=512, width=512)
            edited_image.style(height=512, width=512)
        
        with gr.Row(): 
            randomize_seed = gr.Radio(
                ["Fix Seed", "Randomize Seed"],
                value="Randomize Seed",
                type="index",
                show_label=False,
                interactive=True,
            )
            
            seed = gr.Number(value=90, precision=0, label="Seed", interactive=True)
            text_cfg_scale = gr.Number(value=7.5, label=f"Text weight", interactive=True)
            image_cfg_scale = gr.Number(value=1.5, label=f"Image weight", interactive=True)


        # gr.Markdown(Intro_text)
        
        load_button.click(
            fn=load_example,
            inputs=[seed, randomize_seed],
            outputs=[input_image, instruction, seed, text_cfg_scale, image_cfg_scale, edited_image],
        )
        generate_button.click(
            fn=generate,
            inputs=[
                input_image,
                instruction,
                seed,
                randomize_seed,
                text_cfg_scale,
                image_cfg_scale,
            ],
            outputs=[seed, text_cfg_scale, image_cfg_scale, edited_image],
        )

    demo.queue(concurrency_count=1)
    demo.launch(share=False)


if __name__ == "__main__":
    main()