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Hjj_Mask_and_Actions.lua
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Hjj_Mask_and_Actions.lua
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require 'torch'
require 'math'
local max_mask = 256
function func_mask_random_init(...)
local arg={...}
local total_frms = arg[1]
-- generate a ramdom mask longger than 16 frames
-- because C3D need at least 16 frames
local n1 = 0
local n2 = 0
local avg_len = arg[3]
local generator = torch.Generator()
if total_frms - torch.floor(avg_len) <= 5 then
return {1, total_frms}
else
n1 = torch.random(generator,1,total_frms - torch.floor(avg_len) )
n2 = n1 + torch.floor(avg_len)
end
-- do not see masked area
local mask_table = arg[2]
local flag = true
local count = 0
while flag and count < 10
do
flag = false
for i=1,#mask_table
do
if (n1 > mask_table[i][1] or n1 < mask_table[i][2]) or
(n2 > mask_table[i][1] or n2 < mask_table[i][2]) then
n1 = torch.random(generator,1,total_frms- torch.floor(max_mask/4))
n2 = n1+ torch.floor(avg_len)
flag = true
break
end
end
count = count+1
end -- while flag
return {n1, n2}
end
function func_take_action(old_mask, action, total_frms,alpha, gt)
local new_mask = {}
local len = 0
local offset = 0
if action == 1 then -- move forward
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
new_mask[2] = old_mask[2] - offset
else
new_mask[1] = 1
new_mask[2] = len
end
elseif action == 2 then -- move back
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
elseif action == 4 then -- expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha / 2)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
else
new_mask[1] = 1
end
if (old_mask[2] + offset) < total_frms then
new_mask[2] = old_mask[2] + offset
else
new_mask[2] = total_frms
end
elseif action == 3 then -- narrow
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha / 2)
-- check if at least has 16 frames
if (len - 2*offset) >= 17 then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
else
offset = torch.floor((len - 16) / 2)
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
end
elseif action == 5 then -- jump
local generator = torch.Generator()
local num = torch.random(generator,1,#gt)
local beg = gt[num][1]
local ed = gt[num][2]
local ll = ed-beg
if beg-(old_mask[2]-old_mask[1])+0.1*ll > 1 then
beg = torch.floor(beg-(old_mask[2]-old_mask[1])+0.1*ll)
else
beg = 1
end
ed = torch.floor(ed-0.1*ll)
new_mask[1] = torch.random(generator,beg,ed)
new_mask[2] = new_mask[1]+(old_mask[2]-old_mask[1])
if new_mask[2] >= total_frms then
new_mask[2] = total_frms-1
new_mask[1] = new_mask[1] + total_frms - new_mask[2] - 1
end
else
error('Wrong action')
end
if (new_mask[2] - new_mask[1]+1) < 16 then
print(new_mask[1], new_mask[2])
error('inadequate frames action' .. action)
end
return new_mask
end
-- single side expand
function func_take_advance_action(old_mask, action, total_frms,alpha,gt)
local new_mask = {}
local len = 0
local offset = 0
if action == 1 then -- move forward
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
new_mask[2] = old_mask[2] - offset
else
new_mask[1] = 1
new_mask[2] = len
end
elseif action == 2 then -- move back
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
elseif action == 3 then -- narrow
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha / 2)
-- check if at least has 16 frames
if (len - 2*offset) >= 17 then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
else
offset = torch.floor((len - 16) / 2)
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
end
elseif action == 4 then -- left_expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
else
new_mask[1] = 1
end
new_mask[2] = old_mask[2]
elseif action == 5 then -- right_expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha)
new_mask[1] = old_mask[1]
if (old_mask[2] + offset) < total_frms then
new_mask[2] = old_mask[2] + offset
else
new_mask[2] = total_frms
end
elseif action == 6 then -- jump
--[[
local generator = torch.Generator()
new_mask[1] = torch.random(generator,1,total_frms - (old_mask[2]-old_mask[1]) )
new_mask[2] = new_mask[1]+(old_mask[2]-old_mask[1])
]]
local generator = torch.Generator()
local num = torch.random(generator,1,#gt)
local beg = gt[num][1]
local ed = gt[num][2]
local ll = ed-beg
if beg-(old_mask[2]-old_mask[1])+0.1*ll > 1 then
beg = torch.floor(beg-(old_mask[2]-old_mask[1])+0.1*ll)
else
beg = 1
end
ed = torch.floor(ed-0.1*ll)
new_mask[1] = torch.random(generator,beg,ed)
new_mask[2] = new_mask[1]+(old_mask[2]-old_mask[1])
if new_mask[2] >= total_frms then
new_mask[2] = total_frms-1
new_mask[1] = new_mask[1] + total_frms - new_mask[2] - 1
end
if (new_mask[2] - new_mask[1]+1) <= 17 then
if new_mask[1] < 17 then
new_mask[2] = 17 + new_mask[1]
else
new_mask[1] = new_mask[2] - 17
end
end
else
error('Wrong action')
end
if (new_mask[2] - new_mask[1]+1) < 16 then
print(new_mask[1], new_mask[2])
error('inadequate frames action' .. action)
end
return new_mask
end
-- single side expand validate
function func_take_advance_action_forward(old_mask, action, total_frms,alpha)
local new_mask = {}
local len = 0
local offset = 0
if action == 1 then -- move forward
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
new_mask[2] = old_mask[2] - offset
else
new_mask[1] = 1
new_mask[2] = len
end
elseif action == 2 then -- move back
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
elseif action == 3 then -- narrow
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha / 2)
-- check if at least has 16 frames
if (len - 2*offset) >= 17 then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
else
offset = torch.floor((len - 18) / 2)
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
end
elseif action == 4 then -- left_expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
else
new_mask[1] = 1
end
new_mask[2] = old_mask[2]
elseif action == 5 then -- right_expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha)
new_mask[1] = old_mask[1]
if (old_mask[2] + offset) < total_frms then
new_mask[2] = old_mask[2] + offset
else
new_mask[2] = total_frms
end
elseif action == 6 then -- jump ->take a giant leap instead
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha * 3)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
else
error('Wrong action')
end
if (new_mask[2] - new_mask[1]+1) <= 16 then
print(new_mask[1], new_mask[2])
error('inadequate frames action' .. action)
end
return new_mask
end
-- temporary for validate
function func_take_action_forward(old_mask, action, total_frms,alpha)
local new_mask = {}
local len = 0
local offset = 0
if action == 1 then -- move forward
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
new_mask[2] = old_mask[2] - offset
else
new_mask[1] = 1
new_mask[2] = len
end
elseif action == 2 then -- move back
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
elseif action == 4 then -- expand
len = old_mask[2] - old_mask[1] + 1
if len > max_mask then
return old_mask
end
offset = torch.floor(len * alpha / 2)
if (old_mask[1] - offset) > 0 then
new_mask[1] = old_mask[1] - offset
else
new_mask[1] = 1
end
if (old_mask[2] + offset) < total_frms then
new_mask[2] = old_mask[2] + offset
else
new_mask[2] = total_frms
end
elseif action == 3 then -- narrow
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha / 2)
-- check if at least has 16 frames
if (len - 2*offset) >= 17 then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
else
offset = torch.floor((len - 17) / 2)
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] - offset
end
elseif action == 5 then -- jump -> take a giant leap instead
len = old_mask[2] - old_mask[1] + 1
offset = torch.floor(len * alpha * 3)
if (old_mask[2] + offset) < total_frms then
new_mask[1] = old_mask[1] + offset
new_mask[2] = old_mask[2] + offset
else
new_mask[1] = total_frms - len + 1
new_mask[2] = total_frms
end
else
print(action..'!!!!!!!!!!!!!!!!!!')
error('Wrong action')
end
if (new_mask[2] - new_mask[1]+1) < 17 then
print(new_mask[1], new_mask[2])
error('inadequate frames action' .. action)
end
return new_mask
end