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yanqi liu


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Last seen: ein Tag ago |  Active since 2021

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MATLAB
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Answered
How can I reject an image when the given template is not being matched (depending on any threshold value)?
yes，sir，may be set some thresh to make accept or reject rules，such as % Demo to use normxcorr2 to find a template (a white onio...

ein Tag ago | 0

| accepted

Answered
How to store sequence of images generated from MATLAB online in a Folder
yes，sir，may be check the folder，such as fb = cwtfilterbank('Signallength',length(x),'Wavelet', 'amor'); colormap = jet(128); ...

4 Tage ago | 1

Answered
how to count leaves?
yes，sir，what is leaves，is it the bigger area，may be use image segment，such as im = imread('https://www.mathworks.com/matlabcent...

4 Tage ago | 0

| accepted

Answered
Display same slice across all 3d images in the same folder
yes，sir，may be use for loop to get image list，and use data(:,:,12) to get the 12th slice

4 Tage ago | 0

Answered
Hello! I have an aspheric lens and I need to know the parameters of this lens, for that I need to know the surface's equation, can I use MATLAB to know the lens coordinates?
yes，sir，may be use image segment to get the edge，and then use fit_ellipse to get the parameters，such as im = imread('https://ww...

4 Tage ago | 0

| accepted

Answered
can someone help me edit the code below so that the output image can display the value of rotation angle of the object with axis guide
yes，sir，may be use minboundrect to get the rect area，such as

4 Tage ago | 0

Answered
Apply semanticseg to multiple images
yes，sir，may be make images to image dataset or just to 4-D format，such as >> size(I3) ans = 720 960 3 2 >...

4 Tage ago | 0

Answered
Hi all, how to create image datasets. I need them to train neural networks. I have about 15 to 20 images and I need to turn these images into an image dataset. Please.
yes，sir，may be use cnn transfer to train model，such as unzip('MerchData.zip'); % use image folder to get dataset imds = imag...

4 Tage ago | 0

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

17 Tage 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

17 Tage 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-...

17 Tage 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...

17 Tage 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'));

17 Tage 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, []); ...

17 Tage 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

17 Tage 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...

17 Tage 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...

17 Tage 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...

etwa ein Monat 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 ...

etwa ein Monat 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...

etwa ein Monat 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...

etwa ein Monat 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

etwa ein Monat ago | 0

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

etwa ein Monat 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...

etwa ein Monat 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 ...

etwa ein Monat 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...

etwa ein Monat 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 ...

etwa 2 Monate 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

etwa 2 Monate 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/...

etwa 2 Monate ago | 0

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

etwa 2 Monate ago | 0

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