roi

Number of non-zero pixels in a cv::RotatedRect

旧巷老猫 提交于 2020-01-10 20:10:44
问题 as the title says i'm trying to find the number of non-zero pixels in a certain area of a cv::Mat, namely within a RotatedRect. For a regular Rect one could simply use countNonZeroPixels on a ROI. However ROIs can only be regular (non rotated) rectangles. Another idea was to draw the rotated rectangle and use that as a mask. However openCV neither supports the drawing of rotated rectangles nor does countNonZeroPixels accept a mask. Does anyone have a solution for how to elegantly solve this ?

Number of non-zero pixels in a cv::RotatedRect

女生的网名这么多〃 提交于 2020-01-10 20:06:59
问题 as the title says i'm trying to find the number of non-zero pixels in a certain area of a cv::Mat, namely within a RotatedRect. For a regular Rect one could simply use countNonZeroPixels on a ROI. However ROIs can only be regular (non rotated) rectangles. Another idea was to draw the rotated rectangle and use that as a mask. However openCV neither supports the drawing of rotated rectangles nor does countNonZeroPixels accept a mask. Does anyone have a solution for how to elegantly solve this ?

如何控制RPA项目成本并提升ROI?

只谈情不闲聊 提交于 2020-01-07 14:08:29
ROI(投资回报率)通常是RPA项目中的一个非常关键的指标。在RPA项目中,收益主要表现在成本降低和收入增长两方面,即ROI=(成本降低+收入增长)/总成本。 对企业运营者而言,在评估PRA项目是否值得去做时,计算ROI指标非常重要。如果想要获得可观的经济效益和商业优势,就要在部署RPA时控制好总成本。 然而,项目实施过程中,可能会遇到一些变数,导致出现预算超支、成本增加,从而影响到RPA项目的ROI。 导致成本增加的常见原因有哪些? 1、经验不足的项目负责人可能会低估项目的复杂程度,对预算做出误判,致使预算严重超支。 2、对业务需求了解不透彻,以至于RPA部署不当,导致出现供求矛盾,要不断补充新功能,增加额外成本。 3、对项目建设周期预估不足,反复调试耗费大量人力和时间成本。 企业可以从哪些方面控制对RPA机器人项目的成本投入? 一、选择成熟的RPA产品 成熟的RPA软件产品有着完善的定价体系,针对大、中、小型公司有对应的产品套件及服务方案。企业运营者唯一要考虑的是企业特定流程中对于RPA产品的使用需求。企业可以向RPA厂商征求意见,针对未来的应用拓展做出部署规划。 此外,随着RPA项目的推进,企业需要进一步优化测试环境。这就需要与企业IT部门、技术架构师等进行协调,对IT基础设施做出相应更改。而成熟的RPA产品具有很好的稳定性、拓展性和适应性

What's the ROI of Sub-Repositories?

荒凉一梦 提交于 2020-01-06 19:55:00
问题 I know that sub-repositories save you an your team time, but what is the ROI on them? https://www.mercurial-scm.org/wiki/subrepos 回答1: If you have a dependency which is developed by you along with the main project then subrepos are a perfect fit IMO. I've been using subrepos in these circumstances for a while now and they save a lot of effort. I feel they're particularly beneficial for open-source projects, where getting all dependencies required to build your project can be a pain for

How to extract only circular ROI portion of the image and show Radius of the circle with a button click in Tkinter window of Python OpenCV GUI

|▌冷眼眸甩不掉的悲伤 提交于 2020-01-06 05:39:06
问题 Extract Circular ROI & Show Radius of the Circle in Tkinter Label I am requesting help from python experts in this community. I have searched about my problem all over Stackexchange as well as the Github community. But I didn't find anything helpful. I have created a Tkinter GUI. In this GUI, I can upload my image from the destination folder. In Select of the evaluation section, I have written a script through which I can automatically view my ROI region in the circular part. The GUI is

clear ROI history from kcf tracking in opencv

送分小仙女□ 提交于 2020-01-05 05:46:08
问题 I am using KCF tracking in OpenCV. everything is ok and i can track an object as well, but i have a problem: i set a ROI and algorithm work fine, sometimes i need change my ROI. there for tracker should reset and track my new ROI but it won't. in fact last ROI will remain in history and it effect on new location. also this is my codes summary, i wrote important lines: Rect2d roi; Mat frame; Ptr<Tracker> tracker = Tracker::create("KCF"); VideoCapture cap("C1_0001.mp4"); cap >> frame; roi =

R-FCN: Object Detection via Region-based Fully Convolutional Networks

我只是一个虾纸丫 提交于 2020-01-04 00:56:30
整个 R-FCN 的结构 一个 base 的 conv 网络如 ResNet101, 一个 RPN ( Faster RCNN 来的) , 一个 position sensitive 的 prediction 层,最后的 ROI pooling+ 投票的决策层。 R-FCN 的 idea 出发点(关键思想) 分类需要特征具有平移不变性,检测则要求对目标的平移做出准确响应。现在的大部分 CNN 在分类上可以做的很好,但用在检测上效果不佳。 SPP , Faster R-CNN 类的方法在 ROI pooling 前都是卷积,是具备平移不变性的,但一旦插入 ROI pooling 之后,后面的网络结构就不再具备平移不变性了 。因此,本文想提出来的 position sensitive score map (位敏得分图) 这个概念是能把目标的位置信息融合进 ROI pooling 。 对于 region-based 的检测方法,以 Faster R-CNN 为例,实际上是分成了几个 subnetwork ,第一个用来在整张图上做比较耗时的 conv ,这些操作与 region 无关,是计算共享的。第二个 subnetwork 是用来产生候选的 boundingbox (如 RPN ),第三个 subnetwork 用来分类或进一步对 box 进行 regression (如 Fast

Applying an algorithm to a specific region of an image [closed]

五迷三道 提交于 2020-01-03 07:17:27
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I'm trying to apply an algorithm only to a specific region of an image. I tried imfreehand , but not able, at least for me, to do that using this function. So, is there some way when running my code for the operations to be applied only to some specific region of an image in MATLAB ? Thanks. 回答1: Using a mask

How can I find contours inside ROI using opencv and Python?

徘徊边缘 提交于 2020-01-01 16:25:54
问题 Im trying to find contours in a specific area of the image. Is it possible to just show the contours inside the ROI and not the contours in the rest of the image? I read in another similar post that I should use a mask, but I dont think I used it correctly. Im new to openCV and Python, so any help is much appriciated. import numpy as np import cv2 cap = cv2.VideoCapture('size4.avi') x, y, w, h= 150, 50, 400 ,350 roi = (x, y, w, h) while(True): ret, frame = cap.read() gray = cv2.cvtColor(frame

How can I find contours inside ROI using opencv and Python?

前提是你 提交于 2020-01-01 16:23:27
问题 Im trying to find contours in a specific area of the image. Is it possible to just show the contours inside the ROI and not the contours in the rest of the image? I read in another similar post that I should use a mask, but I dont think I used it correctly. Im new to openCV and Python, so any help is much appriciated. import numpy as np import cv2 cap = cv2.VideoCapture('size4.avi') x, y, w, h= 150, 50, 400 ,350 roi = (x, y, w, h) while(True): ret, frame = cap.read() gray = cv2.cvtColor(frame