^j)#ldZddlZddlZddlmZmZmZmZddlZdddddd eejd e d e d e d e deeejee ee e fff dZ dddejde de dejfdZ dddejdee e fdee de de dejf dZGddZy)uVariable‑size Mixup / CutMix utilities for NaFlex data loaders. This module provides: * `mix_batch_variable_size` – pixel‑level Mixup/CutMix that operates on a list of images whose spatial sizes differ, mixing only their central overlap so no resizing is required. * `pairwise_mixup_target` – builds soft‑label targets that exactly match the per‑sample pixel provenance produced by the mixer. * `NaFlexMixup` – a callable functor that wraps the two helpers and stores all augmentation hyper‑parameters in one place, making it easy to plug into different dataset wrappers. Hacked together by / Copyright 2025, Ross Wightman, Hugging Face N)DictListTupleUnion皙??? mixup_alpha cutmix_alpha switch_prob local_shuffleimgsr r rrreturnctdkr td|dkDr2|dkDr-tjdj |k}|r|n|}n|dkDrd}|}n|dkDrd}|}n tdtj j ||jj }tdtd|}tttfd  }|d kDr6td t||D]} tj|| | |zi} t|d d d|d d dD]\} } | | | <| | | <tdzr|dnd } d gtz}dgtz}ttD]}|| k(r |||<| |}||}}|j\}}}|j\}}}||z}t||t||}}||z}||z dz||z dz}}||z dz||z dz} }|j!}|rt#j$d|z }!t'||!zt'||!z}#}"|"|#z}$tj(d ||"z }%tj(d ||#z }&||%z||&z}(}'||%z| |&z}*})|d d |)|)|"z|*|*|#zf|d d |'|'|"z|(|(|#zf<|||<d|$t+|z z }+|+||<W|d d |||z|||zf},|d d |||z| | |zf}-|,j-|j/|-d|z }.|.|d d |||z|||zf<|||<||z |z ||z|z z}+|+||<||| fS)aOApply Mixup or CutMix on a batch of variable-sized images. Sorts images by aspect ratio and pairs neighboring samples. Only the mutual central overlap region of each pair is mixed. Args: imgs: List of transformed images shaped (C, H, W). mixup_alpha: Beta distribution alpha for Mixup. Set to 0 to disable. cutmix_alpha: Beta distribution alpha for CutMix. Set to 0 to disable. switch_prob: Probability of using CutMix when both modes are enabled. local_shuffle: Size of local windows for shuffling after aspect sorting. Returns: Tuple of (mixed_imgs, lam_list, pair_to) where: - mixed_imgs: List of mixed images - lam_list: Per-sample lambda values representing mixing degree - pair_to: Mapping i -> j of which sample was mixed with which z1Need at least two images to perform Mixup/CutMix.FTu=Both mixup_alpha and cutmix_alpha are zero – nothing to do.rcN|jd|jdz S)Nr)shape)irs a/var/www/ramen.bs-engineer-server.com/venv/lib/python3.12/site-packages/timm/data/naflex_mixup.pyz)mix_batch_variable_size..Es'47==3Cd1gmmTUFV3V)keyrrNalpha)len ValueErrortorchranditem distributionsBetasamplemaxminsortedrangerandomshuffleziprclonemathsqrtintrandintfloatmuladd_)/rr r rr use_cutmixr lam_raworderstartpair_toabodd_one mixed_imgslam_listrjxixj_hiwihjwj dest_areaohow overlap_areatop_ileft_itop_jleft_j cut_ratiochcwcut_areay_offx_offyl_ixl_iyl_jxl_j corrected_lampatch_ipatch_jblendeds/` rmix_batch_variable_sizer`s4 4y1}LMMS\C/ZZ^((*[8 *  s     XYY!!&&ue4;;=BBDG#s3()G 5T#)V WEq1c%j-8 ?E NN5u}'<= > ?!GE#A#Jadd ,1  t9q=eBidG&*Vc$i%7J ECI-H 3t9 +( < GJqM  AJa$q'BHH 2rHH 2rG Rc"bkBBw bQbQvbQbQv XXZ  #-0Ii(#b9n*=BBwHNN1b2g.ENN1b2g.E$D$D68D$)OTSWZ\S\_9\6]Bq$r /4?2 3JqM(U9-="==M'HQKE%"*,fVb[.@@AGE%"*,fVb[.@@AGkk'*//sW}/MG:ABq% "F6B;$66 7JqM&5BW|E[^gEggM'HQKW+(Z x ((rr) smoothingtargets num_classesrac||z }d|z |z}tj|jd|f|tj|j}|j d|j d||S)Nrr)dtypedevicer)r#fullsizefloat32rfscatter_ unsqueeze)rbrcraoff_valon_valy_onehots rsmoothed_sparse_targetroso +%G 9_w &Fzz a+&mm~~ H  a**1-v6 Orr<rAct|||}|j}|jD]5\}}||}||j|j ||d|z 7|S)uCreate soft targets that match the pixel‑level mixing performed. Args: targets: (B,) tensor of integer class indices. pair_to: Mapping of sample index to its mixed partner as returned by mix_batch_variable_size(). lam_list: Per‑sample fractions of own pixels, also from the mixer. num_classes: Total number of classes in the dataset. smoothing: Label‑smoothing value in the range [0, 1). Returns: Tensor of shape (B, num_classes) whose rows sum to 1. rcrarr)ror0itemsmul_r7) rbr<rArcrarnrrBlams rpairwise_mixup_targetrusr(&g;R[\HnnG @1qk !!(1+S3Y!?@ NrceZdZdZdddddddded ed ed ed ed ededdfdZdeejdejde eejeejffdZ y) NaFlexMixupz>!,,,r) __name__ __module__ __qualname____doc__r3r5r|rr#rrrrrrrwrwsF "%"%!$!"%()) )  )  )))#) )<%-u||$%-\\%- tELL!4 #55 6 %-rrw)rr1r-typingrrrrr#rr5r3r`rorurwrrrrs4 ++ !!  j)5<< j)j) j)  j)  j) 4 tE{DcN :;j)b    \\ 2 c3hu+     \\:F-F-r