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yanqi liu


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Last seen: 8 dagar ago |  Active since 2021

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MATLAB
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Answered
How to read image character with OCR?
yes，sir，may be vd=find(comp==max(comp)) to find what vd is？ is the vd in range

8 dagar ago | 0

Answered
Extracting max intensity coordinates from image sequence
yes，sir，may be use some index to transfer，such as im = imread('rice.png'); [max_p, ~] = max(im(:)); disp(max_p) ind = find(i...

8 dagar ago | 0

| accepted

Answered
Extract horizontal and vertical lines from raster image
yes，sir，may be use open and close operation，such as load Iraster.mat bw = im2bw(Iraster); bw2 = imclose(bw, strel('line', 1e2...

23 dagar ago | 0

| accepted

Answered
How to fix Image tearing in video ? Why it Happen ?
yes，sir，may be use imresize to make image to smaller，or just use subplot(1,1,1); such as >> im = imread('football.jpg'); >>...

23 dagar ago | 0

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...

ungefär en månad 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); ...

ungefär en månad 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...

ungefär en månad 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

ungefär en månad 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...

ungefär en månad 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

ungefär en månad 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 >...

ungefär en månad 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...

ungefär en månad 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

ungefär 2 månader 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

ungefär 2 månader 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-...

ungefär 2 månader 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...

ungefär 2 månader 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'));

ungefär 2 månader 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, []); ...

ungefär 2 månader 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

ungefär 2 månader 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...

ungefär 2 månader 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...

ungefär 2 månader 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...

2 månader 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 ...

2 månader ago | 0

| accepted

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...

2 månader 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...

2 månader 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

2 månader ago | 0

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

2 månader 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...

2 månader 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 ...

3 månader 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...

3 månader ago | 0

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