def get_pos_negs_all_v2(dbidxs, label_db: LabelDB, vec_meta: pd.DataFrame):
idxs = pr.BitMap(dbidxs)
relvecs = vec_meta[vec_meta.dbidx.isin(idxs)]
pos = []
neg = []
for idx in dbidxs:
acc_vecs = relvecs[relvecs.dbidx == idx]
acc_boxes = get_boxes(acc_vecs)
label_boxes = label_db.get(idx, format="df")
ious = box_iou(label_boxes, acc_boxes)
total_iou = ious.sum(axis=0)
negatives = total_iou == 0
negvec_positions = acc_vecs.index[negatives].values
# get the highest iou positives for each
max_ious_id = np.argmax(ious, axis=1)
max_ious = np.max(ious, axis=1)
pos_idxs = pr.BitMap(max_ious_id[max_ious > 0])
# if label_boxes.shape[0] > 0: # some boxes are size 0 bc. of some bug in the data, so don't assert here.
# assert len(pos_idxs) > 0
posvec_positions = acc_vecs.index[pos_idxs].values
pos.append(posvec_positions)
neg.append(negvec_positions)
posidxs = pr.BitMap(np.concatenate(pos))
negidxs = pr.BitMap(np.concatenate(neg))
return posidxs, negidxs
def get_pos_negs(box, vec_meta):
"""
For a given image im, and a list of boxes (dataframe)
and metadata of image vectors, compute
1. vectors of image chunks that do not overlap at all
2. vectors of chunks nearest to box center.
"""
if box.shape[0] == 0:
neg_idxs = pr.BitMap(vec_meta.index.values)
pos_idxs = pr.BitMap()
return pos_idxs, neg_idxs
ijs = box2ij(box, base_size=224)
nearest_ijs = nearest_ij(box, base_size=224)
tmp_meta = vec_meta
negatives = []
centers = []
for tup, ctup in zip(ijs.itertuples(), nearest_ijs.itertuples()):
overlap_ijs = tmp_meta.iis.between(
tup.i1, tup.i2 - 1) & (tmp_meta.jjs.between(tup.j1, tup.j2 - 1))
negs = tmp_meta[~overlap_ijs] # no overlap whatsoever
negatives.append(pr.BitMap(negs.index))
cent = tmp_meta[(tmp_meta.iis == ctup.i) & (tmp_meta.jjs == ctup.j)]
centers.append(pr.BitMap(cent.index))
neg_idxs = pr.BitMap.intersection(*negatives)
pos_idxs = pr.BitMap.union(*centers)
return pos_idxs, neg_idxs
def hard_neg_tuples(v, Xt, yt, max_tups):
"""returns indices for the 'hardest' ntups"""
p = np.where(yt > 0)[0]
n = np.where(yt < 1)[0]
assert p.shape[0] > 0
assert n.shape[0] > 0
scores = Xt @ v.reshape(-1, 1)
score_diffs = scores[p].reshape(-1, 1) - scores[n].reshape(1, -1)
iis, jjs = np.meshgrid(np.arange(p.shape[0]),
np.arange(n.shape[0]),
indexing="ij")
diff_order = np.argsort(score_diffs, axis=None)[:max_tups]
# score_diffs.flatten()[diff_order]
pps = p[iis.flatten()[diff_order]]
nns = n[jjs.flatten()[diff_order]]
ridx = np.array(pr.BitMap(pps).union(pr.BitMap(nns)))
lookup_tab = np.zeros(Xt.shape[0], dtype="int") - 1
lookup_tab[ridx] = np.arange(ridx.shape[0], dtype="int")
piis = lookup_tab[pps]
pjjs = lookup_tab[nns]
# then X[ridx][piis] and X[ridx][jjs]
# rdix o piis == iis <=> piis = iis
assert (ridx[piis] == pps).all()
return ridx, piis, pjjs
def query(self,
*,
topk,
mode,
vector=None,
exclude=None,
startk=None,
**kwargs):
if exclude is None:
exclude = pr.BitMap([])
included = pr.BitMap(self.all_indices).difference(exclude)
if len(included) == 0:
return np.array([]), np.array([])
if len(included) <= topk:
topk = len(included)
assert mode == "dot"
metas = self.vector_meta.dbidx.isin(included)
vecs = self.vectors[metas]
if vector is None:
scores = np.random.randn(vecs.shape[0])
else:
scores = vecs @ vector.reshape(-1)
maxpos = np.argsort(-scores)[:topk]
dbidxs = np.array(included)[maxpos]
# metas = metas.iloc[maxpos][['x1', 'y1', ]]
scores = scores[maxpos]
ret = dbidxs
assert ret.shape[0] == scores.shape[0]
sret = pr.BitMap(ret)
assert len(sret) == ret.shape[0] # no repeats
assert ret.shape[
0] == topk # return quantity asked, in theory could be less
assert sret.intersection_cardinality(
exclude) == 0 # honor exclude request
def make_acc(sc, dbidx):
return pd.DataFrame.from_records(
[dict(x1=0, y1=0, x2=224, y2=224, dbidx=dbidx, score=sc)])
return {
"dbidxs":
ret,
"nextstartk":
len(exclude) + ret.shape[0],
"activations":
[make_acc(sc, dbidx) for (sc, dbidx) in zip(scores, ret)],
}
def __init__(self, index: AccessMethod):
self.index = index
self.returned = (
pr.BitMap()
) # images returned from index (not necessarily seen yet)
self.label_db = LabelDB()
self.startk = 0
def query(self, *, topk, vector, exclude=None, startk=None, **kwargs):
agg_method = 'avg_score'
if exclude is None:
exclude = pr.BitMap([])
included = pr.BitMap(self.all_indices).difference(exclude)
if len(included) == 0:
return np.array([]), np.array([])
if len(included) <= topk:
topk = len(included)
fullmeta = self.vector_meta[self.vector_meta.dbidx.isin(included)]
nframes = len(included)
dbidxs = np.zeros(nframes) * -1
dbscores = np.zeros(nframes)
activations = []
for i, (dbidx, frame_vec_meta) in enumerate(fullmeta.groupby("dbidx")):
dbidxs[i] = dbidx
boxscs = np.zeros(frame_vec_meta.shape[0])
for j in range(frame_vec_meta.shape[0]):
tup = frame_vec_meta.iloc[j:j + 1]
# GET BOX
# GET IMAGE
# GET VECTOR
image_vector = tup.vectors.values[0]
# CROSS VECTOR
#print(tup)
#print(tup.vectors.values[0])
score = image_vector @ vector.reshape(-1)
boxscs[j] = score
frame_activations = frame_vec_meta.assign(score=boxscs)
frame_activations = frame_activations[
frame_activations.score == frame_activations.score.max()][[
"x1", "y1", "x2", "y2", "dbidx", "score", "filename"
]]
activations.append(frame_activations)
dbscores[i] = np.max(boxscs)
topkidx = np.argsort(-dbscores)[:topk]
return {
"dbidxs": dbidxs[topkidx].astype("int"),
"nextstartk": 100, #nextstartk,
"activations": [activations[idx] for idx in topkidx],
}
def __init__(
self,
gdm: GlobalDataManager,
dataset: SeesawDatasetManager,
hdb: AccessMethod,
params: SessionParams,
):
self.gdm = gdm
self.dataset = dataset
self.acc_indices = []
self.acc_activations = []
self.seen = pr.BitMap([])
self.accepted = pr.BitMap([])
self.params = params
self.init_q = None
self.timing = []
self.image_timing = {}
self.index = hdb
self.q = hdb.new_query()
self.loop = SeesawLoop(self.gdm, self.q, params=self.params)
self.action_log = []
self._log("init")
def __init__(self, filepath, mode='r'):
self._mode = mode
try:
fmode = {'r': 'rb', 'rw': 'r+b'}[self._mode]
except KeyError:
raise ValueError('invalid mode')
if (not os.path.isfile(filepath)) and self._mode == 'rw':
with open(filepath, 'wb') as fp:
b = roaring.BitMap()
fp.write(b.serialize())
self._fp = open(filepath, fmode)
buff = self._fp.read()
self._fp.seek(0)
self.map = roaring.BitMap.deserialize(buff)
def get_metric_summary(res: BenchResult):
session = res.session
curr_idx = 0
hit_indices = []
for ent in session.gdata:
for imdata in ent:
if is_image_accepted(imdata):
hit_indices.append(curr_idx)
curr_idx += 1
index_set = pr.BitMap(hit_indices)
assert len(index_set) == len(hit_indices)
return dict(
hit_indices=np.array(index_set),
nseen=curr_idx,
nimages=res.nimages,
ntotal=res.ntotal,
total_time=res.total_time,
)
def restrict_fine_grained(vec_meta, vec, indxs):
assert vec_meta.shape[0] == vec.shape[0]
assert (indxs[1:] > indxs[:-1]).all(), "must be sorted"
mask = vec_meta.dbidx.isin(pr.BitMap(indxs))
if mask.all():
return vec_meta, vec
vec_meta = vec_meta[mask]
vec = vec[mask]
lookup_table = np.zeros(vec_meta.dbidx.max() + 1).astype("int") - 1
lookup_table[indxs] = np.arange(indxs.shape[0], dtype="int")
new_dbidx = lookup_table[vec_meta.dbidx]
assert (new_dbidx >= 0).all()
vec_meta = vec_meta.assign(
dbidx=new_dbidx) # this line shows up in profiler
assert (
vec_meta.dbidx.unique().shape[0] == indxs.shape[0]
), "missing fine-grained embedding for some of the indices requested"
assert vec_meta.shape[0] == vec.shape[0]
return vec_meta.reset_index(drop=True), vec
def get_nns(startk, topk):
i = 0
deltak = topk * 100
while True:
if i > 1:
print(
"warning, we are looping too much. adjust initial params?"
)
vec_idxs, scores = self.vec_index.query(vector,
top_k=startk + deltak)
found_idxs = pr.BitMap(vec_meta.dbidx.values[vec_idxs])
newidxs = found_idxs.difference(exclude)
if len(newidxs) >= topk:
break
deltak = deltak * 2
i += 1
return vec_idxs, scores
def get_seen(self):
return pr.BitMap(self.ldata.keys())
def _query_prelim(self,
*,
vector,
topk,
zoom_level,
exclude=None,
startk=None):
if exclude is None:
exclude = pr.BitMap([])
included_dbidx = pr.BitMap(self.all_indices).difference(exclude)
vec_meta = self.vector_meta
if len(included_dbidx) == 0:
print("no dbidx included")
return [], [], []
if len(included_dbidx) <= topk:
topk = len(included_dbidx)
## want to return proposals only for images we have not seen yet...
## but library does not allow this...
## guess how much we need... and check
def get_nns(startk, topk):
i = 0
deltak = topk * 100
while True:
if i > 1:
print(
"warning, we are looping too much. adjust initial params?"
)
vec_idxs, scores = self.vec_index.query(vector,
top_k=startk + deltak)
found_idxs = pr.BitMap(vec_meta.dbidx.values[vec_idxs])
newidxs = found_idxs.difference(exclude)
if len(newidxs) >= topk:
break
deltak = deltak * 2
i += 1
return vec_idxs, scores
def get_nns_by_vector_exact():
scores = self.vectors @ vector.reshape(-1)
vec_idxs = np.argsort(-scores)
return vec_idxs, scores[vec_idxs]
if self.vec_index is not None:
idxs, scores = get_nns(startk, topk)
else:
idxs, scores = get_nns_by_vector_exact()
# work only with the two columns here bc dataframe can be large
topscores = vec_meta[["dbidx"]].iloc[idxs]
topscores = topscores.assign(score=scores)
allscores = topscores
newtopscores = topscores[~topscores.dbidx.isin(exclude)]
scoresbydbidx = (newtopscores.groupby("dbidx").score.max().sort_values(
ascending=False))
score_cutoff = scoresbydbidx.iloc[topk - 1] # kth largest score
newtopscores = newtopscores[newtopscores.score >= score_cutoff]
# newtopscores = newtopscores.sort_values(ascending=False)
nextstartk = (allscores.score >= score_cutoff).sum()
nextstartk = math.ceil(startk * 0.8 +
nextstartk * 0.2) # average to estimate next
candidates = pr.BitMap(newtopscores.dbidx)
assert len(candidates) >= topk
assert candidates.intersection_cardinality(exclude) == 0
return newtopscores.index.values, candidates, allscores, nextstartk
