Writer/palmyra-vision

Palmyra_vision 7B

Palmyra_vision models are trained on PixMo, a dataset of 1 million

Quick Start

To run Palmyra_vision, first install dependencies:

pip install einops torchvision

Then, follow these steps:

from transformers import AutoModelForCausalLM, AutoProcessor, GenerationConfig
from PIL import Image
import requests

# load the processor
processor = AutoProcessor.from_pretrained(
    'Writer/palmyra-vision',
    trust_remote_code=True,
    torch_dtype='auto',
    device_map='auto'
)

# load the model
model = AutoModelForCausalLM.from_pretrained(
    'Writer/palmyra-vision',
    trust_remote_code=True,
    torch_dtype='auto',
    device_map='auto'
)

# process the image and text
inputs = processor.process(
    images=[Image.open(requests.get("https://picsum.photos/id/237/536/354", stream=True).raw)],
    text="Describe this image."
)

# move inputs to the correct device and make a batch of size 1
inputs = {k: v.to(model.device).unsqueeze(0) for k, v in inputs.items()}

# generate output; maximum 200 new tokens; stop generation when <|endoftext|> is generated
output = model.generate_from_batch(
    inputs,
    GenerationConfig(max_new_tokens=200, stop_strings="<|endoftext|>"),
    tokenizer=processor.tokenizer
)

# only get generated tokens; decode them to text
generated_tokens = output[0,inputs['input_ids'].size(1):]
generated_text = processor.tokenizer.decode(generated_tokens, skip_special_tokens=True)

# print the generated text
print(generated_text)

# >>>  This image features an adorable black Labrador puppy, captured from a top-down
#      perspective. The puppy is sitting on a wooden deck, which is composed ...

To make inference more efficient, run with autocast:

with torch.autocast(device_type="cuda", enabled=True, dtype=torch.bfloat16):
  output = model.generate_from_batch(
      inputs,
      GenerationConfig(max_new_tokens=200, stop_strings="<|endoftext|>"),
      tokenizer=processor.tokenizer
  )

We did most of our evaluation in this setting (autocast on, but float32 weights)

To even further reduce the memory requirements, the model can be run with bfloat16 weights:

model.to(dtype=torch.bfloat16)
inputs["images"] = inputs["images"].to(torch.bfloat16)
output = model.generate_from_batch(
    inputs,
    GenerationConfig(max_new_tokens=200, stop_strings="<|endoftext|>"),
    tokenizer=processor.tokenizer
)

Note that we have observed that this can change the output of the model compared to running with float32 weights.

Evaluations

Model	Average Score on 11 Academic Benchmarks	Human Preference Elo Rating
Palmyra_vision (this model)	78.3	1056
GPT-4o	78.5	1079
GPT-4V	71.1	1041
Gemini 1.5 Pro	78.3	1074
Gemini 1.5 Flash	75.1	1054
Claude 3.5 Sonnet	76.7	1069
Claude 3 Opus	66.4	971
Claude 3 Haiku	65.3	999
Qwen VL2 72B	79.4	1037
Qwen VL2 7B	73.7	1025
Intern VL2 LLAMA 76B	77.1	1018
Intern VL2 8B	69.4	953
Pixtral 12B	69.5	1016
Phi3.5-Vision 4B	59.7	982
PaliGemma 3B	50.0	937
LLAVA OneVision 72B	76.6	1051
LLAVA OneVision 7B	72.0	1024
Cambrian-1 34B	66.8	953
Cambrian-1 8B	63.4	952
xGen - MM - Interleave 4B	59.5	979
LLAVA-1.5 13B	43.9	960
LLAVA-1.5 7B	40.7	951

Benchmarks: AI2D test, ChartQA test, VQA v2.0 test, DocQA test, InfographicVQA test, TextVQA val, RealWorldQA, MMMU val, MathVista testmini, CountBenchQA, Flickr Count (we collected this new dataset that is significantly harder than CountBenchQA).

FAQs

I'm getting an error a broadcast error when processing images!

Your image might not be in RGB format. You can convert it using the following code snippet:

from PIL import Image

image = Image.open(...)

if image.mode != "RGB":
    image = image.convert("RGB")

Palmyra_vision doesn't work great with transparent images!

We received reports that Palmyra_vision models might struggle with transparent images. For the time being, we recommend adding a white or dark background to your images before passing them to the model. The code snippet below shows how to do this using the Python Imaging Library (PIL):

# Load the image
url = "..."
image = Image.open(requests.get(url, stream=True).raw)

# Convert the image to grayscale to calculate brightness
gray_image = image.convert('L')  # Convert to grayscale

# Calculate the average brightness
stat = ImageStat.Stat(gray_image)
average_brightness = stat.mean[0]  # Get the average value

# Define background color based on brightness (threshold can be adjusted)
bg_color = (0, 0, 0) if average_brightness > 127 else (255, 255, 255)

# Create a new image with the same size as the original, filled with the background color
new_image = Image.new('RGB', image.size, bg_color)

# Paste the original image on top of the background (use image as a mask if needed)
new_image.paste(image, (0, 0), image if image.mode == 'RGBA' else None)

# Now you can pass the new_image to Palmyra_vision
processor = AutoProcessor.from_pretrained(
    'Writer/palmyra-vision',
    trust_remote_code=True,
    torch_dtype='auto',
    device_map='auto'
)