Microsoft drops Florence-2, a unified mannequin to deal with a wide range of imaginative and prescient duties

At the moment, Microsoft’s Azure AI crew dropped a brand new imaginative and prescient basis mannequin referred to as Florence-2 on Hugging Face.

Out there beneath a permissive MIT license, the mannequin can deal with a wide range of imaginative and prescient and vision-language duties utilizing a unified, prompt-based illustration. It is available in two sizes — 232M and 771M parameters — and already excels at duties similar to captioning, object detection, visible grounding and segmentation, acting on par or higher than many giant imaginative and prescient fashions on the market.

Whereas the real-world efficiency of the mannequin is but to be examined, the work is anticipated to provide enterprises a single, unified method to deal with various kinds of imaginative and prescient functions. This can save investments on separate task-specific imaginative and prescient fashions that fail to past their main perform, with out in depth fine-tuning.

What makes Florence-2 distinctive?

At the moment, giant language fashions (LLMs) sit on the coronary heart of enterprise operations. A single mannequin can present summaries, write advertising copies and even deal with customer support in lots of circumstances. The extent of adaptability throughout domains and duties has been wonderful. However, this success has additionally left researchers questioning: Can imaginative and prescient fashions, which have been largely task-specific, do the identical? 

On the core, imaginative and prescient duties are extra advanced than text-based pure language processing (NLP). They demand complete perceptual capacity. Primarily, to attain common illustration of various imaginative and prescient duties, a mannequin should be able to understanding spatial knowledge throughout completely different scales, from broad image-level ideas like object location, to fine-grained pixel particulars, in addition to semantic particulars similar to high-level captions to detailed descriptions.

When Microsoft tried fixing this, it discovered two key roadblocks: Shortage of comprehensively annotated visible datasets and the absence of a unified pretraining framework with a singular community structure that built-in the power to grasp spatial hierarchy and semantic granularity.

To deal with this, the corporate first used specialised fashions to generate a visible dataset referred to as FLD-5B. It included a complete of 5.4 billion annotations for 126 million photographs, overlaying particulars from high-level descriptions to particular areas and objects. Then, utilizing this knowledge, it skilled Florence-2, which makes use of a sequence-to-sequence structure (a sort of neural community designed for duties involving sequential knowledge) integrating a picture encoder and a multi-modality encoder-decoder. This permits the mannequin to deal with varied imaginative and prescient duties, with out requiring task-specific architectural modifications​​.

“All annotations within the dataset, FLD-5B, are uniformly standardized into textual outputs, facilitating a unified multi-task studying method with constant optimization with the identical loss perform as the target,” the researchers wrote within the paper detailing the mannequin. “The end result is a flexible imaginative and prescient basis mannequin able to performing a wide range of duties… all inside a single mannequin ruled by a uniform set of parameters. Process activation is achieved by way of textual prompts, reflecting the method utilized by giant language fashions.”

Efficiency higher than bigger fashions

When prompted with photographs and textual content inputs, Florence-2 handles a wide range of duties, together with object detection, captioning, visible grounding and visible query answering. Extra importantly, it delivers this with high quality on par or higher than many bigger fashions. 

As an illustration, in a zero-shot captioning check on the COCO dataset, each 232M and 771M variations of Florence outperformed Deepmind’s 80B parameter Flamingo visible language mannequin with scores of 133 and 135.6, respectively. They even did higher than Microsoft’s personal visible grounding-specific Kosmos-2 mannequin.

When fine-tuned with public human-annotated knowledge, Florence-2, regardless of its compact measurement, was in a position to compete carefully with a number of bigger specialist fashions throughout duties like visible query answering.

“The pre-trained Florence-2 spine enhances efficiency on downstream duties, e.g. COCO object detection and occasion segmentation, and ADE20K semantic segmentation, surpassing each supervised and self-supervised fashions,” the researchers famous. “In comparison with pre-trained fashions on ImageNet, ours improves coaching effectivity by 4X and achieves substantial enhancements of 6.9, 5.5, and 5.9 factors on COCO and ADE20K datasets.”

As of now, each pre-trained and fine-tuned variations of Florence-2 232M and 771M can be found on Hugging Face beneath a permissive MIT license that permits for unrestricted distribution and modification for business use or non-public use. 

It will likely be attention-grabbing to see how builders will put it to make use of and offload the necessity for separate imaginative and prescient fashions for various duties. Small, task-agnostic fashions cannot solely save builders the necessity to work with completely different fashions but in addition lower down the compute prices by a major margin.