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# xingze tian

##### Last seen: 26 días ago
19 total contributions since 2020

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Question

How to apply spatially-varying blur to an image?
Hi I have an image of size 128x128, and an associated a blur map, where each element defines the size of the blur kernel. How c...

alrededor de 1 mes ago | 1 answer | 0

### 1

Question

How to only replot part of a graph?
Hi I'm currently plotting cubic bezier splines. My aim is that every time I move a control point, the bezier curve moves accod...

alrededor de 1 mes ago | 1 answer | 0

### 1

Unrecognized property 'LabelTextColor' for class 'images.roi.Point'
The problem is solved when switching to 2020b. Thank you very much for all your help!

alrededor de 1 mes ago | 0

| accepted

Question

How to fit ascending data with piecewise linear function?
Hi, I have a vector r sorted in asending order. Now I would like to fit this r with m+1 pieces, and extract the m internal poin...

alrededor de 2 meses ago | 1 answer | 0

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Question

Unrecognized property 'LabelTextColor' for class 'images.roi.Point'
Hi, on the official website of matlab: https://uk.mathworks.com/help/images/ref/drawpoint.html#mw_d573bdc7-78b6-41f4-8ee9-c545...

2 meses ago | 2 answers | 0

### 2

Question

How to only change part of the background color?
Hi, I have a figure as my ui. Now I would like to plot something in the middle of the ui: axes('Position',[.7 .7 .2 .2]) set (...

2 meses ago | 1 answer | 0

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Question

Why conv2 gives opposite sign
Hi, I have a simple matrix I: I = [1,2,3,4,5; 6,7,8,9,10; 11,12,13,14,15; 16,17,18,19,20; 21,22,23,24,25] ...

3 meses ago | 2 answers | 0

### 2

How to stick one figure to the center of another figure
I figured out a quick solution. Simply change the last part as: figure(1) imshow(img) No need to copy the object.

3 meses ago | 0

Question

How to stick one figure to the center of another figure
I have a main figure f with size 1200 x 800 working as my UI. I created another figure f2 of size 512x512 which presents an imag...

3 meses ago | 2 answers | 0

### 2

Question

Is there a way to input direction in matlab UI
Hi, I would like to let users to click on an image and input the normal vector of the pixel. Is there a way to let the users inp...

4 meses ago | 0 answers | 0

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Question

How to repeat different vectors to form another vector?
Hi I would like to construct a vector as: 1,2,3,1,2,3,1,2,3,4,5,6,4,5,6,4,5,6.....k-2,k-1,k,k-2,k-1,k i.e. repeat [1,2,3], [4,...

4 meses ago | 2 answers | 0

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Question

How to plot images with different sizes in one figure?
I have 5 images and I would like to plot them like: fig1 fig2 fig3 fig4 fig5 i.e. I would like to have two rows, the fir...

5 meses ago | 1 answer | 0

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Question

2d convolution returns empty result
I have an image matrix of size 512x512x3, for each pixel I would like to compute its weight as the average of the neighbouring p...

7 meses ago | 1 answer | 0

### 1

Question

How to use 2D logical mask on an image without for loop?
I have two image matrices A and B with size 512 x 512 x 3, and a logical mask of size 512 x 512. For each position with true val...

7 meses ago | 1 answer | 0

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Question

How to change plot figure resolution
I have a few points originally designed for 512x512 resolution, such as [128,450] and [336, 500]. When plotting them, I initiall...

7 meses ago | 1 answer | 0

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Question

How to know which pixels are covered by a plot?
Hi, I plotted a few curves on a 512 x 512 figure (each curve has 32 points). How could I know which pixels are covered with the ...

7 meses ago | 1 answer | 0

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Question

How to set default background for figures to be negative
I'm currently using matlab's rasterization functionality. After I plot a curve, I saved the whole image to a matrix using img =...

7 meses ago | 0 answers | 0

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Question

How to interpolate color along a curve with specific colors?
Hi, I have a curve of dimension 50x2, and a specification of the colors at certain positions. For example, at position 1 the col...

8 meses ago | 1 answer | 0