MFTF: Mask-free Training-free Object Level Layout Control Diffusion Model

Text-to-image generation models have become transformative tools. However, diffusion-based vision language models still lack the ability to precisely control the shape, appearance, and positional placement of objects in generated images using text guidance alone. Global image editing models typically achieve global layout control by relying on additional masks or images as guidance, which often require model training. Although local object-editing models enable modification of object shapes, they do not provide control over the positional placement of these objects. To address these limitations, we propose the MFTF model, which enables precise control over object positioning without requiring additional masks or images. The MFTF model supports both single-object and multi-object positional control (such as translation, rotation, etc.) and allows for concurrent layout control and object semantic editing. This is achieved by controlling the denoising process of the diffusion model through parallel denoising. Attention masks are dynamically generated from the cross-attention layers of the source diffusion model and applied to queries from the self-attention layers to isolate objects. These queries are then modified according to layout control parameters and injected back into the self-attention layers of the target diffusion model to enable precise positional control.