Refine CM4AI-DREAM dataset documentation

README.md

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 # CM4AI-DREAM training data
 
-CM4AI-DREAM provides single-cell fluorescence microscopy training data for conditional protein-stain generation. Morphology stains, cell-line information, target protein identifiers and protein sequences provide context for the observed protein stain.
+CM4AI-DREAM provides fluorescence microscopy training data for conditional protein-stain generation. Morphology stains, cell-line information, target protein identifiers and protein sequences provide context for the observed protein stain.
 
-The HPA images derive from Human Protein Atlas version 25 and were cropped to single cells, resized and converted to 8-bit images.
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-The KOLF images were generated by the Cell Maps for Artificial Intelligence (CM4AI) project in KOLF2.1J human induced pluripotent stem cells. They were background-subtracted, normalized per well, converted to 8-bit images and cropped to 512 × 512 pixel single-cell images.
+The HPA images derive from Human Protein Atlas version 25. The KOLF images were generated by the Cell Maps for Artificial Intelligence (CM4AI) project in KOLF2.1J human induced pluripotent stem cells. Each image is a 512 × 512 pixel crop centered on a target cell, spanning approximately 48.2 × 48.2 μm (0.0942 μm per pixel). Crops can also contain neighboring cells.
 
 Protein sequences come from Ensembl release 109.