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# Philip

### University of Surrey

57 total contributions since 2011

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Question

drawing on an image in loop
How can I draw on an from loop iterations, without 'imread' and 'imwrite'? EDIT: Inside the loop, I am doing some processing ...

más de 8 años ago | 2 answers | 0

### 2

Question

Auto fill an image based on edge line
Is there a way to automatically fill an image (as though using the paint bucket tool in Photoshop) based on a line that runs fro...

más de 8 años ago | 2 answers | 0

### 2

Question

Analyse the "Gibbs Phenomenon" from Image Data
Slightly related to my previous post regarding the ringing artifact in compressed images, I have a question regarding the Gibb's...

más de 8 años ago | 0 answers | 0

### 0

Question

Image data as a sine wave?
Does anybody know if it is possible to represent image data as a sine wave?

más de 8 años ago | 1 answer | 0

### 1

Question

What statistical features can I use to distinguish these images?
I have two 25x25 pixel images that are quite similar: A: http://imageshack.us/photo/my-images/546/18lwin.png/ B: http://imag...

más de 8 años ago | 0 answers | 0

### 0

Question

'closeness' of multiple vectors
Is there a way to compute how 'closely' a data vector matches another? For example: A = [1 2 3 4 5]; B = [1 2 3 4 5...

más de 8 años ago | 1 answer | 0

### 1

Question

Find smallest cell in cell array
Is there a way to find the smallest sized cell in a cell array? Thanks!

más de 8 años ago | 1 answer | 0

### 1

Dump Image Pixels into vector from coordinates
On a similar note, is there any way that I can replace the following loop: label_ids = [1 3 11 24 55]; map = zeros(heigh...

más de 8 años ago | 0

Question

Dump Image Pixels into vector from coordinates
Is there a way to use 2 vectors of pixel coordinates to quickly dump the pixel values into a 3rd vector? Currently, I am usin...

más de 8 años ago | 3 answers | 0

### 3

Question

Image Edges: Calculate complexity of a line segment?
Can anyone suggest a good way to calculate the 'complexity' of a line segment (obtained from 'bwlabel' after 'canny' edge detect...

más de 8 años ago | 3 answers | 0

### 3

Question

Image Processing: Near/Far Objects
Does anyone know of any techniques that make it possible to work out how close an object is to the camera (when the image was ca...

más de 8 años ago | 1 answer | 0

### 1

Question

Canny Edge Detection - Automatic/Adaptive Thresholding
I have read in the docs for the 'edge' function that when a low and high threshold are not defined when calling the 'canny' edge...

más de 8 años ago | 4 answers | 1

### 4

Question

Sobel Edge Thresholds
I would like to test several sobel edge threshold values to identify which threshold is the best suited to a particular task... ...

casi 9 años ago | 3 answers | 0

### 3

Question

Change how this plot looks
Is there a way to modify the attached plot in MATLAB, such that it contains another y-axis on the right hand side called "ADR" (...

casi 9 años ago | 1 answer | 0

### 1

Question

Extract all red pixels from image to binary image
Does anybody know of a way to extract all 'red' values [255 0 0] from an image to make a binary image where 1's indicate the loc...

casi 9 años ago | 2 answers | 1

### 2

Question

Dilate a line and color both sides
Does anyone know if it's possible to dilate a line in an image, such that one side of the original line is colored red, and the ...

casi 9 años ago | 2 answers | 0

### 2

Question

Create new binary image from pixel values of another image
I have a grayscale uint8 image, and I want to create a second image that is mostly zeros, but has a 1 wherever the pixel value i...

casi 9 años ago | 3 answers | 1

### 3

Question

Dictionaries of Hashtables in MATLAB?
Hi all, Is there a way to create a hash table or dictionary in MATLAB such that I can retrieve a set of values based on a key...

casi 9 años ago | 1 answer | 0

### 1

Question

Draw a straight line in image, given an angle
Is there a way to draw a straight line in an image from a starting (x,y) coordinate, such that the line is equivalent to a speci...

alrededor de 9 años ago | 2 answers | 0

### 2

Question

Rotate image about a specified pixel coordinate
Does anyone know of a way to rotate an image about a specified pixel coordinate? If I have the pixel coordinates (50,55) for ex...

alrededor de 9 años ago | 2 answers | 0

### 2

Question

Normal vector of line based on pixel coordinates
I have an array that contains the x,y pixel coordinates of edges in an image. I want to use three of these coordinates at a tim...

alrededor de 9 años ago | 2 answers | 0

### 2

Question

Image Processing: Break straight lines
I have an edge image of a square, and would like to treat it as 4 separate lines: 2 horizontal and 2 vertical. Is there a way t...

alrededor de 9 años ago | 2 answers | 0

### 2

Question

sort a structure
Is it possible to create a structure that holds the following information: * id_number * length such that I can then sort...

alrededor de 9 años ago | 1 answer | 0

### 1

Question

Image Processing: Find nearest nonzero pixel value to specified pixel coordinates
Is there a way to find the closest non-zero pixel value to specified x,y coordinates of an image by shifting only the horizontal...

alrededor de 9 años ago | 1 answer | 0

### 1

Question

Image Processing: Find Edge with Highest Contrast
Is it possible to scan an image to find only the edge with the highest dynamic range to its left and right. At first I want to ...

alrededor de 9 años ago | 2 answers | 0

### 2

Question

Image Processing: Keep only highest "intensity" values
Does anyone know of a way that I can reduce the following image to an image that only includes the highest intensities (for want...

alrededor de 9 años ago | 1 answer | 0

### 1

Question

Dear all, I have two values representing the max and min of a data vector. max_val = 0.9855; min_val = 0.9851; Bot...

más de 9 años ago | 3 answers | 3

### 3

"Fill" Binary Image
Thanks for your help! I really must read the literature for morphological operations... The erode and dilate methodology seems...

más de 9 años ago | 0

Question

"Fill" Binary Image
Hi, Is there a way to "fill" a binary image such that textured regions become black? As an example, I would like to make thi...

más de 9 años ago | 3 answers | 0

### 3

Question

Edge direction
Is there a function to check if an edge changes direction? I have used bwlabel to work on connected edges, but now I only w...

más de 9 años ago | 1 answer | 0