Stack Overflow
Stack Overflow

Questions tagged [faster-rcnn]

Faster-RCNN is a very common Regional Convolutional Neural Network architecture that detects and recognizes objects in images in a single forward pass

332 questions
2
votes
1 answer

Can someone give me an explanation for Multibox loss function?

I have found some expression for SSD Multibox-loss function as follows: multibox_loss = confidence_loss + alpha * location_loss Can someone explains what are the explanations for those terms?
Mcstang94
  • 31
  • 1
  • 5
2
votes
1 answer

What kind of image is used for training in Mask RCNN( only 8 bit or 16 bit images or any depth)?

I have a small doubt regarding the MaskRCNN images for training purpose. Is MRCNN is taking only 8 bit images for training? if its taking any 16 bit or 32 bit images, How it will help us by training? Usually the visualization happens for 8 bit…
Anju Kaimal
  • 83
  • 1
  • 1
  • 4
2
votes
0 answers

What is the difference between mAP from Mask R-CNN utils.py and mAP from (MS)COCO?

I trained my Mask R-CNN Network with my own data, which i transformed into COCO Style for my Thesis and now i want to evaluate my results. I found two methods to do that. One method is the evaluation from COCO itself. Mask R-CNN itself shows how to…
Mob
  • 409
  • 1
  • 5
  • 14
2
votes
0 answers

How Region proposal network works in Faster R-CNN?

I try to understand how anchor boxes coordinate generated from feature map, and i have some questions about this process. 1-) From above image, feature map size is N x M x C and sliding windows is chosen as 3x3. What is the mission of this 3x3…
Bedrick Kiq
  • 365
  • 1
  • 5
  • 14
2
votes
0 answers

How to learn a hidden model variable (task variance) in tensorflow that has no ground truth data

I am working with a faster-rcnn type of system where automated focal loss was recently implemented from https://arxiv.org/pdf/1904.09048.pdf In the above-linked paper in section 3.4. Regression it states We assume that the labels are distributed…
Alex
  • 21
  • 1
  • 2
2
votes
1 answer

The confidence level of tensorflow object detection API

I am working on performing object detection via tensorflow, and I am facing problems that the object etection is not very accurate. The architecture I am using is faster_rcnn_resnet_101. More specifically, the question I want to address is as…
luelue
  • 45
  • 1
  • 7
2
votes
1 answer

What is the type of CNN that is used in Keras for image classification?

I have a CNN architecture that I train to recognize some objects that I need to eventually use in real time and then use the output of detected objects for further work. I have two questions regarding this that I need to have answered to evaluate…
ibrahim.bond
  • 127
  • 1
  • 3
  • 12
2
votes
2 answers

Where is faster_rcnn_resnet101 (like where are the layers) defined in tensorflow

I am really new to machine learning and I am currently using Tensorflow Object Detection API to perform object detection, and the model I use is faster_rcnn_resnet101. What I am looking for is the python code that defined the architecture, such as…
luelue
  • 45
  • 1
  • 7
2
votes
1 answer

Why does ssd and yolo has no roi pooling layer?

We know that the object detection framework like faster-rcnn and mask-rcnn has an roi pooling layer or roi align layer. But why ssd and yolo framework has no such layers?
tidy
  • 4,747
  • 9
  • 49
  • 89
2
votes
1 answer

What's the external algorithm used for hypothesis generation in Fast R-CNN and SPP-net?

I understood that we need selective search as an external algorithm for generating region of interest proposals in R-CNN, but in Fast R-CNN we can simply take in the entire image, and then passes it to the convolutional network to create a feature…
Anu
  • 3,198
  • 5
  • 28
  • 49
2
votes
0 answers

building 'pycocotools._mask' extension error: unknown file type '.pyx' (from 'pycocotools/_mask.pyx')

when I run the tf-faster-rcnn following its introductions, I get the following error when I run make under the path ../tf-faster-rcnn/data/coco/PythonAPI/: python setup.py build_ext --inplace running build_ext building 'pycocotools._mask'…
dwqy11
  • 125
  • 1
  • 1
  • 8
1
vote
0 answers

Is there a way to change the backbone of Detectron2 keypoint detection model with custom object detection model?

I am working on a task where I have to detect people and do activity recognition. I am using **Detectron2 **Keypoint detection model.There are many False negatives with the detection. So my solution to reduce the FN's is to train the custom…
sp0800
  • 11
  • 1
1
vote
0 answers

Error in checkpoint.py in Tensorflow2 on custom dataset using pre-built FRCNN model

I am using TF2 for teeth classification using panoramic X-ray images. The images have been reduced to 640x640 and the annotations scaled accordingly. The original image looks like this: The test run went successful, confirming that the installation…
seekme_94
  • 162
  • 1
  • 4
  • 17
1
vote
0 answers

Mask RCNN Keras custom image dimensions

I am trying to follow the example provided by https://tensorflow-object-detection-api-tutorial.readthedocs.io/en/latest/training.html#configure-the-training-pipeline to train the faster_rcnn_resnet50_v1_640x640_coco17_tpu-8 model on images sized…
Timothy Tuti
  • 11
  • 1
1
vote
0 answers

Mask RCNN error - ValueError: shapes (5,1048576) and (3136,1) not aligned: 1048576 (dim 1) != 3136 (dim 0) after removing use_mini_mask

image_id = random.choice(dataset.image_ids) print(image_id) image, image_meta, gt_class_id, gt_bbox, gt_mask = modellib.load_image_gt(dataset, config, image_id) info = dataset.image_info[image_id] print("image ID: {}.{} ({})…
cide12
  • 11
  • 1
1 2 3
…
22 23