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yanqi liu


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Last seen: 12 giorni ago Active since 2021

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MATLAB
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Answered
Training my YOLOv2 object detector failed
yes,sir,may be use yolo v3、v4 to test,such as https://ww2.mathworks.cn/matlabcentral/fileexchange/72520-yolov3-yolov4-matlab

12 giorni ago | 0

Answered
How to save an image which only display properly using imshow(grayImg,[])?
yes,sir,may be use imwrite(mat2gray(grayImg),outputFileName); and, then to check the file

12 giorni ago | 0

Answered
how can i Find a midline using two lines
yes,sir,which is the center line,is it like this? may be check https://ww2.mathworks.cn/matlabcentral/answers/1712640-how-...

12 giorni ago | 0

Answered
How to create a centerline between lines in image?
yes,sir,which is the target line,may be check this https://ww2.mathworks.cn/matlabcentral/answers/1712640-how-to-create-centerl...

12 giorni ago | 0

Answered
I am getting error in this imread statement. I don't know where it's wrong, please help, thanks
yes,sir,may be make some parameters to the function,such as re = img2coe3('./1.png', imread('football.jpg'));

12 giorni ago | 0

Answered
How to rotate an image in Matlab
yes,sir,may be rot90,such as im = imread('football.jpg'); for i = 1 : 4 im = rot90(im, 1); figure; imshow(im, []); ...

12 giorni ago | 0

Answered
Change color representation of pressure sensor data converted to images on MATLAB code.
yes,sir,may be use ind2rgb、ind2gray to get color index format to image file

12 giorni ago | 0

Answered
How to create centerline between to lines in image
yes,sir,may be check the center line,such as fullFileName = 'https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/9885...

12 giorni ago | 0

Answered
"Dot indexing is not supported for variables of this type." error in reading VideoReader Object by its index?
yes,sir,may be use VideoReader to make video to frame image file list,and then use the images to analysis,such as function nFra...

12 giorni ago | 0

Answered
How to save image from dataset in MATLAB
load matlab1.mat %% create grayscale shapes that resemble the data [numImages, lenImage] = size(Dataset1000); Dataset1000 = r...

30 giorni ago | 0

Answered
Measure Euclidean Distance of mask in crack image
yes,sir,may be use bwlabel and regionpropers to get the center and BoundbingBox of two object,then compute the average distance ...

30 giorni ago | 0

Answered
help ! how do i fix this error : Error using .* Integers can only be combined with integers of the same class, or scalar doubles.
im=imread('football.jpg'); im=imresize(im,20/size(im,1),'bilinear'); R=im(:,:,1); G=im(:,:,2); B=im(:,:,3); Y=0.299*R + 0.5...

30 giorni ago | 0

Answered
How to repair the vertical lines ?
yes,sir,may be use image pixel peaks to find line,such as img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded...

30 giorni ago | 0

Answered
How to get location of central frequency and poles in FFT
yes,sir,may be use Butterworth band stop filter to location the bright area

30 giorni ago | 0

Answered
license manager error-10
yes,sir,may be use student version or use college public license to update

30 giorni ago | 0

Answered
I have a jpg image of a wetland using RGN filter and would like to determine the % "colour" from this image. Any ideas? I'm very much a novice.... Thanks!
yes,sir,may be use color enhance to process,such as img = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_file...

30 giorni ago | 0

Answered
count rectangular and circles
yes,sir,use regionpropers to find difference between rectagular and circle, may be use: Circularity、BoundingBox such as bwi ...

circa un mese ago | 0

Answered
Set to zero values in matrix in between two lines
yes,sir,may be use mask to process,such as width=1000; height=200; A=rand(height,width); % create a random matrix/image fi...

circa un mese ago | 0

Answered
Local Thresholding in blocks error
yes,sir,may be check the loop process,such as filename = 'football.jpg'; S = 3; IM=imread(filename); if size(IM,3)==3 ...

circa 2 mesi ago | 0

Answered
a video in which I have to get the exact motion of a moving object and calculate the coordinates of that object before and after the movement.
yes,sir,may be use image background and frame diff,such as then,we can diff background from video,and get

circa 2 mesi ago | 0

Answered
How to resize a specific part of an image?
yes,sir,may be make the target thin,such as im = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/949514/...

circa 2 mesi ago | 0

Answered
problem with videoWriter not closing (2)
yes,sir,may be use fclose('all') to make all handler close

circa 2 mesi ago | 0

Answered
Data reduction or resize function for imagesc plot
yes,sir,may be use pca to get data dimension reduce,and plot in two or three space

circa 2 mesi ago | 0

Answered
read specific values and ignore them using fread
yes,sir,may be use loop to make it,but the result should be check,such as fid=fopen('Alien_Message'); im_1=fread(fid,251,'ui...

circa 2 mesi ago | 0

| accepted

Answered
how can i detect sky
yes,sir,for more image,may be use DeepLearning to segment but just for this image,we can use some simple method,such as im = i...

circa 2 mesi ago | 2

Answered
How do I compute for the area and diameter of each raindrop and make graph analysis
yes,sir,may be use ar = sum(cat(1, stats.Area)); to get the sum area

circa 2 mesi ago | 0

Answered
Which interpolation technique should I use for time series analysis of Landsat data?
yes,sir,may be use lstm、bp or svm to make regress application on time series data

circa 2 mesi ago | 0

Answered
I am currently trying to plot the radon transform of f(x,y)=cos(ax+by)
yes,sir,may be use fmesh to plot,such as syms x y fmesh(cos(x+y))

circa 2 mesi ago | 0

Answered
How to detect faces without using vision.CascadeObjectDetector
yes,sir,may be use ycbcr color segment to identify face as simple method if possible,can you upload your image to analysis?

circa 2 mesi ago | 0

Answered
Imregtform for only part of the image
yes,sir,may be use Kalman filter to track target object,such as https://www.mathworks.com/help/releases/R2019a/vision/examples/...

circa 2 mesi ago | 0

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