| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | module athena__dropblock2d_layer | ||
| 2 | !! Module containing implementation of a 2D dropblock layer | ||
| 3 | !! | ||
| 4 | !! This module implements DropBlock regularization for 2D convolutional layers, | ||
| 5 | !! dropping contiguous regions (blocks) instead of individual elements. | ||
| 6 | !! More effective than dropout for convolutional networks. | ||
| 7 | !! | ||
| 8 | !! Mathematical operation (training): | ||
| 9 | !! 1. Compute drop probability per spatial location: | ||
| 10 | !! gamma = p * (feature_size^2) / (block_size^2 * valid_positions) | ||
| 11 | !! 2. Sample Bernoulli mask M_i ~ Bernoulli(gamma) | ||
| 12 | !! 3. Expand mask to block_size x block_size blocks | ||
| 13 | !! 4. Apply and normalize: | ||
| 14 | !! y = x * M * (count_elements / count_ones) | ||
| 15 | !! | ||
| 16 | !! where block_size is the spatial extent of each dropped block | ||
| 17 | !! | ||
| 18 | !! Inference: acts as identity (no dropout applied) | ||
| 19 | !! \[ | ||
| 20 | !! y_i = x_i | ||
| 21 | !! \] | ||
| 22 | !! | ||
| 23 | !! Benefits: Better for convolutions (spatial coherence), removes semantic info, | ||
| 24 | !! forces network to learn from dispersed features | ||
| 25 | !! Typical: block_size=7, keep_prob=0.9 for ResNet | ||
| 26 | !! Reference: Ghiasi et al. (2018), NeurIPS - https://arxiv.org/abs/1810.12890 | ||
| 27 | use coreutils, only: real32, stop_program | ||
| 28 | use athena__base_layer, only: drop_layer_type, base_layer_type | ||
| 29 | use diffstruc, only: array_type, operator(*) | ||
| 30 | use athena__misc_types, only: & | ||
| 31 | onnx_node_type, onnx_initialiser_type, onnx_tensor_type | ||
| 32 | use athena__diffstruc_extd, only: merge_over_channels | ||
| 33 | implicit none | ||
| 34 | |||
| 35 | |||
| 36 | private | ||
| 37 | |||
| 38 | public :: dropblock2d_layer_type | ||
| 39 | public :: read_dropblock2d_layer | ||
| 40 | |||
| 41 | |||
| 42 | type, extends(drop_layer_type) :: dropblock2d_layer_type | ||
| 43 | !! Type for 2D dropblock layer with overloaded procedures | ||
| 44 | integer :: block_size, half | ||
| 45 | !! Block size and half block size | ||
| 46 | !! Block size is the width of the block to drop (typical = 5) | ||
| 47 | real(real32) :: gamma | ||
| 48 | !! Number of activation units to drop | ||
| 49 | integer :: num_channels | ||
| 50 | !! Number of channels | ||
| 51 | logical, allocatable, dimension(:,:) :: mask | ||
| 52 | !! Mask for dropblock | ||
| 53 | contains | ||
| 54 | procedure, pass(this) :: set_hyperparams => set_hyperparams_dropblock2d | ||
| 55 | !! Set hyperparameters for 2D dropblock layer | ||
| 56 | procedure, pass(this) :: init => init_dropblock2d | ||
| 57 | !! Initialise 2D dropblock layer | ||
| 58 | procedure, pass(this) :: print_to_unit => print_to_unit_dropblock2d | ||
| 59 | !! Print 2D dropblock layer to unit | ||
| 60 | procedure, pass(this) :: read => read_dropblock2d | ||
| 61 | !! Read 2D dropblock layer from file | ||
| 62 | |||
| 63 | procedure, pass(this) :: forward => forward_dropblock2d | ||
| 64 | !! Forward propagation derived type handler | ||
| 65 | |||
| 66 | procedure, pass(this) :: generate_mask => generate_bernoulli_mask | ||
| 67 | !! Generate Bernoulli mask | ||
| 68 | end type dropblock2d_layer_type | ||
| 69 | |||
| 70 | interface dropblock2d_layer_type | ||
| 71 | !! Interface for setting up the 2D dropblock layer | ||
| 72 | module function layer_setup( & | ||
| 73 | rate, block_size, & | ||
| 74 | input_shape, & | ||
| 75 | verbose ) result(layer) | ||
| 76 | !! Set up the 2D dropblock layer | ||
| 77 | real(real32), intent(in) :: rate | ||
| 78 | !! Drop rate | ||
| 79 | integer, intent(in) :: block_size | ||
| 80 | !! Block size | ||
| 81 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 82 | !! Input shape | ||
| 83 | integer, optional, intent(in) :: verbose | ||
| 84 | !! Verbosity level | ||
| 85 | type(dropblock2d_layer_type) :: layer | ||
| 86 | !! Instance of the 2D dropblock layer | ||
| 87 | end function layer_setup | ||
| 88 | end interface dropblock2d_layer_type | ||
| 89 | |||
| 90 | |||
| 91 | |||
| 92 | contains | ||
| 93 | |||
| 94 | !############################################################################### | ||
| 95 | − | module function layer_setup( & | |
| 96 | rate, block_size, & | ||
| 97 | − | input_shape, & | |
| 98 | − | verbose ) result(layer) | |
| 99 | !! Set up the 2D dropblock layer | ||
| 100 | implicit none | ||
| 101 | |||
| 102 | ! Arguments | ||
| 103 | real(real32), intent(in) :: rate | ||
| 104 | !! Drop rate | ||
| 105 | integer, intent(in) :: block_size | ||
| 106 | !! Block size | ||
| 107 | integer, dimension(:), optional, intent(in) :: input_shape | ||
| 108 | !! Input shape | ||
| 109 | integer, optional, intent(in) :: verbose | ||
| 110 | !! Verbosity level | ||
| 111 | |||
| 112 | type(dropblock2d_layer_type) :: layer | ||
| 113 | !! Instance of the 2D dropblock layer | ||
| 114 | |||
| 115 | ! Local variables | ||
| 116 | integer :: verbose_ = 0 | ||
| 117 | !! Verbosity level | ||
| 118 | |||
| 119 | |||
| 120 | − | if(present(verbose)) verbose_ = verbose | |
| 121 | |||
| 122 | !--------------------------------------------------------------------------- | ||
| 123 | ! Initialise hyperparameters | ||
| 124 | !--------------------------------------------------------------------------- | ||
| 125 | − | call layer%set_hyperparams(rate, block_size, verbose=verbose_) | |
| 126 | |||
| 127 | |||
| 128 | !--------------------------------------------------------------------------- | ||
| 129 | ! Initialise layer shape | ||
| 130 | !--------------------------------------------------------------------------- | ||
| 131 | − | if(present(input_shape)) call layer%init(input_shape=input_shape) | |
| 132 | |||
| 133 | − | end function layer_setup | |
| 134 | !############################################################################### | ||
| 135 | |||
| 136 | |||
| 137 | !############################################################################### | ||
| 138 | − | pure subroutine set_hyperparams_dropblock2d(this, rate, block_size, verbose) | |
| 139 | !! Set hyperparameters for 2D dropblock layer | ||
| 140 | implicit none | ||
| 141 | |||
| 142 | ! Arguments | ||
| 143 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 144 | !! Instance of the 2D dropblock layer | ||
| 145 | real(real32), intent(in) :: rate | ||
| 146 | !! Drop rate | ||
| 147 | integer, intent(in) :: block_size | ||
| 148 | !! Block size | ||
| 149 | integer, optional, intent(in) :: verbose | ||
| 150 | !! Verbosity level | ||
| 151 | |||
| 152 | − | this%name = "dropblock2d" | |
| 153 | − | this%type = "drop" | |
| 154 | − | this%input_rank = 3 | |
| 155 | − | this%output_rank = 3 | |
| 156 | |||
| 157 | − | this%rate = rate | |
| 158 | − | this%block_size = block_size | |
| 159 | − | this%half = (this%block_size-1)/2 | |
| 160 | |||
| 161 | − | end subroutine set_hyperparams_dropblock2d | |
| 162 | !############################################################################### | ||
| 163 | |||
| 164 | |||
| 165 | !############################################################################### | ||
| 166 | − | subroutine init_dropblock2d(this, input_shape, verbose) | |
| 167 | !! Initialise 2D dropblock layer | ||
| 168 | implicit none | ||
| 169 | |||
| 170 | ! Arguments | ||
| 171 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 172 | !! Instance of the 2D dropblock layer | ||
| 173 | integer, dimension(:), intent(in) :: input_shape | ||
| 174 | !! Input shape | ||
| 175 | integer, optional, intent(in) :: verbose | ||
| 176 | !! Verbosity level | ||
| 177 | |||
| 178 | ! Local variables | ||
| 179 | integer :: verbose_ = 0 | ||
| 180 | !! Verbosity level | ||
| 181 | |||
| 182 | |||
| 183 | !--------------------------------------------------------------------------- | ||
| 184 | ! Initialise optional arguments | ||
| 185 | !--------------------------------------------------------------------------- | ||
| 186 | − | if(present(verbose)) verbose_ = verbose | |
| 187 | |||
| 188 | |||
| 189 | !--------------------------------------------------------------------------- | ||
| 190 | ! Initialise input shape | ||
| 191 | !--------------------------------------------------------------------------- | ||
| 192 | − | if(.not.allocated(this%input_shape)) call this%set_shape(input_shape) | |
| 193 | |||
| 194 | |||
| 195 | !--------------------------------------------------------------------------- | ||
| 196 | ! Set up number of channels, width, height | ||
| 197 | !--------------------------------------------------------------------------- | ||
| 198 | − | this%num_channels = this%input_shape(3) | |
| 199 | − | allocate(this%output_shape(2)) | |
| 200 | − | this%output_shape = this%input_shape | |
| 201 | |||
| 202 | |||
| 203 | !--------------------------------------------------------------------------- | ||
| 204 | ! Set gamma | ||
| 205 | !--------------------------------------------------------------------------- | ||
| 206 | ! original paper uses keep_prob, we use drop_rate | ||
| 207 | ! drop_rate = 1 - keep_prob | ||
| 208 | this%gamma = ( this%rate/this%block_size**2._real32 ) * & | ||
| 209 | − | this%input_shape(1) / & | |
| 210 | − | (this%input_shape(1) - this%block_size + 1._real32) * & | |
| 211 | − | this%input_shape(2) / & | |
| 212 | − | (this%input_shape(2) - this%block_size + 1._real32) | |
| 213 | − | allocate(this%mask( & | |
| 214 | − | this%input_shape(1), & | |
| 215 | − | this%input_shape(2)), source=.true.) | |
| 216 | |||
| 217 | |||
| 218 | !--------------------------------------------------------------------------- | ||
| 219 | ! Generate mask | ||
| 220 | !--------------------------------------------------------------------------- | ||
| 221 | − | call this%generate_mask() | |
| 222 | |||
| 223 | |||
| 224 | !--------------------------------------------------------------------------- | ||
| 225 | ! Allocate arrays | ||
| 226 | !--------------------------------------------------------------------------- | ||
| 227 | − | if(this%use_graph_input)then | |
| 228 | call stop_program( & | ||
| 229 | "Graph input not supported for 2D dropblock layer" & | ||
| 230 | − | ) | |
| 231 | − | return | |
| 232 | end if | ||
| 233 | − | if(allocated(this%output)) deallocate(this%output) | |
| 234 | − | allocate( this%output(1,1) ) | |
| 235 | |||
| 236 | end subroutine init_dropblock2d | ||
| 237 | !############################################################################### | ||
| 238 | |||
| 239 | |||
| 240 | !############################################################################### | ||
| 241 | − | subroutine generate_bernoulli_mask(this) | |
| 242 | !! Generate Bernoulli mask | ||
| 243 | implicit none | ||
| 244 | |||
| 245 | ! Arguments | ||
| 246 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 247 | !! Instance of the 2D dropblock layer | ||
| 248 | |||
| 249 | ! Local variables | ||
| 250 | − | real(real32), allocatable, dimension(:,:) :: mask_real | |
| 251 | !! Real mask | ||
| 252 | integer :: i, j | ||
| 253 | !! Loop indices | ||
| 254 | integer, dimension(2) :: ilim, jlim | ||
| 255 | !! Limits for mask | ||
| 256 | |||
| 257 | |||
| 258 | ! Generate Bernoulli mask | ||
| 259 | !--------------------------------------------------------------------------- | ||
| 260 | ! assume random number already seeded and don't need to again | ||
| 261 | − | allocate(mask_real(size(this%mask,1), size(this%mask,2))) | |
| 262 | − | call random_number(mask_real) ! Generate random values in [0..1] | |
| 263 | |||
| 264 | − | this%mask = .true. ! 1 = keep | |
| 265 | |||
| 266 | ! Apply threshold to create binary mask | ||
| 267 | !--------------------------------------------------------------------------- | ||
| 268 | − | do j = 1 + this%half, size(this%mask, dim=2) - this%half | |
| 269 | − | do i = 1 + this%half, size(this%mask, dim=1) - this%half | |
| 270 | − | if(mask_real(i, j).lt.this%gamma)then | |
| 271 | ilim(:) = [ & | ||
| 272 | max(i - this%half, lbound(this%mask,1)), & | ||
| 273 | − | min(i + this%half, ubound(this%mask,1)) ] | |
| 274 | jlim(:) = [ & | ||
| 275 | max(j - this%half, lbound(this%mask,2)), & | ||
| 276 | − | min(j + this%half, ubound(this%mask,2)) ] | |
| 277 | − | this%mask(ilim(1):ilim(2), jlim(1):jlim(2)) = .false. ! 0 = drop | |
| 278 | end if | ||
| 279 | end do | ||
| 280 | end do | ||
| 281 | |||
| 282 | − | end subroutine generate_bernoulli_mask | |
| 283 | !############################################################################### | ||
| 284 | |||
| 285 | |||
| 286 | !##############################################################################! | ||
| 287 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 288 | !##############################################################################! | ||
| 289 | |||
| 290 | |||
| 291 | !############################################################################### | ||
| 292 | − | subroutine print_to_unit_dropblock2d(this, unit) | |
| 293 | !! Print 2D dropblock layer to unit | ||
| 294 | use coreutils, only: to_upper | ||
| 295 | implicit none | ||
| 296 | |||
| 297 | ! Arguments | ||
| 298 | class(dropblock2d_layer_type), intent(in) :: this | ||
| 299 | !! Instance of the 2D dropblock layer | ||
| 300 | integer, intent(in) :: unit | ||
| 301 | !! File unit | ||
| 302 | |||
| 303 | |||
| 304 | ! Write initial parameters | ||
| 305 | !--------------------------------------------------------------------------- | ||
| 306 | − | write(unit,'(3X,"INPUT_SHAPE = ",3(1X,I0))') this%input_shape | |
| 307 | − | write(unit,'(3X,"RATE = ",F0.9)') this%rate | |
| 308 | − | write(unit,'(3X,"BLOCK_SIZE = ",I0)') this%block_size | |
| 309 | |||
| 310 | − | end subroutine print_to_unit_dropblock2d | |
| 311 | !############################################################################### | ||
| 312 | |||
| 313 | |||
| 314 | !############################################################################### | ||
| 315 | − | subroutine read_dropblock2d(this, unit, verbose) | |
| 316 | !! Read 2D dropblock layer from file | ||
| 317 | use athena__tools_infile, only: assign_val, assign_vec | ||
| 318 | use coreutils, only: to_lower, to_upper, icount | ||
| 319 | implicit none | ||
| 320 | |||
| 321 | ! Arguments | ||
| 322 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 323 | !! Instance of the 2D dropblock layer | ||
| 324 | integer, intent(in) :: unit | ||
| 325 | !! File unit | ||
| 326 | integer, optional, intent(in) :: verbose | ||
| 327 | !! Verbosity level | ||
| 328 | |||
| 329 | ! Local variables | ||
| 330 | integer :: stat, verbose_ = 0 | ||
| 331 | !! File status and verbosity level | ||
| 332 | integer :: itmp1 | ||
| 333 | !! Temporary integer | ||
| 334 | integer :: block_size | ||
| 335 | !! Block size | ||
| 336 | real(real32) :: rate | ||
| 337 | !! Drop rate | ||
| 338 | integer, dimension(3) :: input_shape | ||
| 339 | !! Input shape | ||
| 340 | character(256) :: buffer, tag, err_msg | ||
| 341 | !! Buffer, tag, and error message | ||
| 342 | |||
| 343 | |||
| 344 | ! Initialise optional arguments | ||
| 345 | !--------------------------------------------------------------------------- | ||
| 346 | − | if(present(verbose)) verbose_ = verbose | |
| 347 | |||
| 348 | |||
| 349 | ! Loop over tags in layer card | ||
| 350 | !--------------------------------------------------------------------------- | ||
| 351 | − | tag_loop: do | |
| 352 | |||
| 353 | ! Check for end of file | ||
| 354 | !------------------------------------------------------------------------ | ||
| 355 | − | read(unit,'(A)',iostat=stat) buffer | |
| 356 | − | if(stat.ne.0)then | |
| 357 | write(err_msg,'("file encountered error (EoF?) before END ",A)') & | ||
| 358 | − | to_upper(this%name) | |
| 359 | − | call stop_program(err_msg) | |
| 360 | − | return | |
| 361 | end if | ||
| 362 | − | if(trim(adjustl(buffer)).eq."") cycle tag_loop | |
| 363 | |||
| 364 | ! Check for end of layer card | ||
| 365 | !------------------------------------------------------------------------ | ||
| 366 | − | if(trim(adjustl(buffer)).eq."END "//to_upper(trim(this%name)))then | |
| 367 | − | backspace(unit) | |
| 368 | − | exit tag_loop | |
| 369 | end if | ||
| 370 | |||
| 371 | − | tag=trim(adjustl(buffer)) | |
| 372 | − | if(scan(buffer,"=").ne.0) tag=trim(tag(:scan(tag,"=")-1)) | |
| 373 | |||
| 374 | ! Read parameters from save file | ||
| 375 | !------------------------------------------------------------------------ | ||
| 376 | − | select case(trim(tag)) | |
| 377 | case("INPUT_SHAPE") | ||
| 378 | − | call assign_vec(buffer, input_shape, itmp1) | |
| 379 | case("RATE") | ||
| 380 | − | call assign_val(buffer, rate, itmp1) | |
| 381 | case("BLOCK_SIZE") | ||
| 382 | − | call assign_val(buffer, block_size, itmp1) | |
| 383 | case default | ||
| 384 | ! Don't look for "e" due to scientific notation of numbers | ||
| 385 | ! ... i.e. exponent (E+00) | ||
| 386 | − | if(scan(to_lower(trim(adjustl(buffer))),& | |
| 387 | 'abcdfghijklmnopqrstuvwxyz').eq.0)then | ||
| 388 | − | cycle tag_loop | |
| 389 | − | elseif(tag(:3).eq.'END')then | |
| 390 | − | cycle tag_loop | |
| 391 | end if | ||
| 392 | write(err_msg,'("Unrecognised line in input file: ",A)') & | ||
| 393 | − | trim(adjustl(buffer)) | |
| 394 | − | call stop_program(err_msg) | |
| 395 | − | return | |
| 396 | end select | ||
| 397 | end do tag_loop | ||
| 398 | |||
| 399 | |||
| 400 | ! Set hyperparameters and initialise layer | ||
| 401 | !--------------------------------------------------------------------------- | ||
| 402 | call this%set_hyperparams( & | ||
| 403 | rate = rate, block_size = block_size, & | ||
| 404 | verbose = verbose_ & | ||
| 405 | − | ) | |
| 406 | − | call this%init(input_shape = input_shape) | |
| 407 | |||
| 408 | |||
| 409 | ! Check for end of layer card | ||
| 410 | !--------------------------------------------------------------------------- | ||
| 411 | − | read(unit,'(A)') buffer | |
| 412 | − | if(trim(adjustl(buffer)).ne."END "//to_upper(trim(this%name)))then | |
| 413 | − | write(0,*) trim(adjustl(buffer)) | |
| 414 | − | write(err_msg,'("END ",A," not where expected")') to_upper(this%name) | |
| 415 | − | call stop_program(err_msg) | |
| 416 | − | return | |
| 417 | end if | ||
| 418 | |||
| 419 | end subroutine read_dropblock2d | ||
| 420 | !############################################################################### | ||
| 421 | |||
| 422 | |||
| 423 | !############################################################################### | ||
| 424 | − | function read_dropblock2d_layer(unit, verbose) result(layer) | |
| 425 | !! Read 2D dropblock layer from file and return layer | ||
| 426 | implicit none | ||
| 427 | |||
| 428 | ! Arguments | ||
| 429 | integer, intent(in) :: unit | ||
| 430 | !! File unit | ||
| 431 | integer, optional, intent(in) :: verbose | ||
| 432 | !! Verbosity level | ||
| 433 | class(base_layer_type), allocatable :: layer | ||
| 434 | !! Instance of the base layer | ||
| 435 | |||
| 436 | ! Local variables | ||
| 437 | integer :: verbose_ = 0 | ||
| 438 | !! Verbosity level | ||
| 439 | |||
| 440 | − | if(present(verbose)) verbose_ = verbose | |
| 441 | − | allocate(layer, source=dropblock2d_layer_type(rate=0._real32, block_size=0)) | |
| 442 | − | call layer%read(unit, verbose=verbose_) | |
| 443 | |||
| 444 | − | end function read_dropblock2d_layer | |
| 445 | !############################################################################### | ||
| 446 | |||
| 447 | |||
| 448 | !##############################################################################! | ||
| 449 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 450 | !##############################################################################! | ||
| 451 | |||
| 452 | |||
| 453 | !############################################################################### | ||
| 454 | − | subroutine build_from_onnx_dropblock2d( & | |
| 455 | − | this, node, initialisers, value_info, verbose & | |
| 456 | ) | ||
| 457 | !! Read ONNX attributes for 2D dropblock layer | ||
| 458 | implicit none | ||
| 459 | |||
| 460 | ! Arguments | ||
| 461 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 462 | !! Instance of the 2D dropblock layer | ||
| 463 | type(onnx_node_type), intent(in) :: node | ||
| 464 | !! ONNX node information | ||
| 465 | type(onnx_initialiser_type), dimension(:), intent(in) :: initialisers | ||
| 466 | !! ONNX initialiser information | ||
| 467 | type(onnx_tensor_type), dimension(:), intent(in) :: value_info | ||
| 468 | !! ONNX value info | ||
| 469 | integer, intent(in) :: verbose | ||
| 470 | !! Verbosity level | ||
| 471 | |||
| 472 | ! Local variables | ||
| 473 | integer :: i | ||
| 474 | !! Loop index | ||
| 475 | real(real32) :: rate | ||
| 476 | !! Dropout rate | ||
| 477 | integer :: block_size | ||
| 478 | !! Block size | ||
| 479 | character(256) :: val | ||
| 480 | !! Attribute value | ||
| 481 | |||
| 482 | ! Set default values | ||
| 483 | − | rate = 0.1_real32 | |
| 484 | − | block_size = 7 | |
| 485 | |||
| 486 | ! Parse ONNX attributes | ||
| 487 | − | do i = 1, size(node%attributes) | |
| 488 | − | val = node%attributes(i)%val | |
| 489 | − | select case(trim(adjustl(node%attributes(i)%name))) | |
| 490 | case("drop_prob") | ||
| 491 | − | read(val,*) rate | |
| 492 | case("block_size") | ||
| 493 | − | read(val,*) block_size | |
| 494 | case default | ||
| 495 | ! Do nothing | ||
| 496 | write(0,*) "WARNING: Unrecognised attribute in ONNX & | ||
| 497 | − | &DROPBLOCK2D layer: ", trim(adjustl(node%attributes(i)%name)) | |
| 498 | end select | ||
| 499 | end do | ||
| 500 | |||
| 501 | ! Check size of initialisers is zero | ||
| 502 | − | if(size(initialisers).ne.0)then | |
| 503 | − | write(0,*) "WARNING: initialisers not used for ONNX DROPBLOCK2D layer" | |
| 504 | end if | ||
| 505 | |||
| 506 | call this%set_hyperparams( & | ||
| 507 | rate = rate, & | ||
| 508 | block_size = block_size, & | ||
| 509 | verbose = verbose & | ||
| 510 | − | ) | |
| 511 | |||
| 512 | − | end subroutine build_from_onnx_dropblock2d | |
| 513 | !############################################################################### | ||
| 514 | |||
| 515 | |||
| 516 | !##############################################################################! | ||
| 517 | ! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! | ||
| 518 | !##############################################################################! | ||
| 519 | |||
| 520 | |||
| 521 | !############################################################################### | ||
| 522 | − | subroutine forward_dropblock2d(this, input) | |
| 523 | !! Forward propagation | ||
| 524 | implicit none | ||
| 525 | |||
| 526 | ! Arguments | ||
| 527 | class(dropblock2d_layer_type), intent(inout) :: this | ||
| 528 | !! Instance of the 2D dropblock layer | ||
| 529 | class(array_type), dimension(:,:), intent(in) :: input | ||
| 530 | !! Input values | ||
| 531 | |||
| 532 | ! Local variables | ||
| 533 | real(real32) :: rtmp1 | ||
| 534 | !! Temporary variable | ||
| 535 | type(array_type), pointer :: ptr | ||
| 536 | !! Pointer array | ||
| 537 | |||
| 538 | |||
| 539 | − | rtmp1 = 1._real32 - this%rate | |
| 540 | − | select case(this%inference) | |
| 541 | case(.true.) | ||
| 542 | ! Do not perform the drop operation | ||
| 543 | − | ptr => input(1,1) * rtmp1 | |
| 544 | case default | ||
| 545 | ! Perform the drop operation | ||
| 546 | − | rtmp1 = 1._real32 / rtmp1 | |
| 547 | ptr => merge_over_channels( & | ||
| 548 | − | input(1,1), 0._real32, & | |
| 549 | − | reshape(this%mask, shape = [product(shape(this%mask)), 1]) & | |
| 550 | − | ) * rtmp1 | |
| 551 | end select | ||
| 552 | − | call this%output(1,1)%assign_and_deallocate_source(ptr) | |
| 553 | − | this%output(1,1)%is_temporary = .false. | |
| 554 | |||
| 555 | − | end subroutine forward_dropblock2d | |
| 556 | !############################################################################### | ||
| 557 | |||
| 558 | − | end module athena__dropblock2d_layer | |
| 559 |