What is the difference between graylevel image and intensity normalized image?
I have gray level images and I'd like to normalize them by intensity before next stage process. These gray level images are converted from RGB images by rgb2gray(). The pixel value varies between 0 and 255.
Here is what I do (follow ImageAnalyst's code)
image = imread('grayImage.bmp');
imageMin = double(min(min(image)));
imageMax = double(max(max(image)));
imageRange = imageMax - imageMin;
newMin = 0;
newMax = 1;
newRange = newMax - newMin;
newImage = newRange * (double(image) - imageMin) / imageRange + newMin;
imwrite(im...Normalizing an image
I have an RGB image and i want to use the LST color space (similar to the Ohta color space).
L = (k/sqrt(3)) * (R+G+B)
S = (k/sqrt(2)) * (R-B)
T = (k/sqrt(6)) * (R-2G+B)
Then I have to compute a histogram for each channel with 16bins. The problem is that i have to normalize de image so i can use this to compose a color feature, but i don't know how normalize the image.
Can anyone help me?
Just divide by 65535 to get them into the range of 0-1.
On Apr 6, 2:12=A0pm, ImageAnalyst <imageanal...@mailinator.com> wrote:
> Just divide by 6553...how do I do normalization of images?
I want to normalize images before doing a comparison
please define normalize......
"maciek" <firstname.lastname@example.org> wrote in message
> I want to normalize images before doing a comparison
...how do I normalize images?
I want to find correlation between 2 images but found out that first
I should normalize images, how do I do it in matlab?
My job is to classify raptors into their specific type using Artificial Neural Network.
I have already finished processing the image and now i have the raptor's silhouette. The thing is, not all raptor faced the same direction in the image, therefore i need to find a way to normalize them so that they would be looking the same direction (consistent). I also have problem finding useful features to look into for my NN inputs.
About normalizing the raptor, i thought about using a rectangle to compare every angle of the silhouette till the rectangle fill most of the image (wings of an rapt...normal : is this normal ?
Here is the problem : I'm factorising rational functions, and everything
goes well, but then I try to check the result using the "normal"
command, and I came to this strange behaviour. Can anyone explain ?
My understanding of ?normal suggests that it could be a bug.
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.._|\| |/|_. Copyright (c) 2001 by Waterloo Maple Inc.
\ MAPLE / All rights reserved. Maple is a registered trademark of
<____ ____> Waterloo Maple Inc.
| Type ? for help.
> f:=-x^2/(1-x)/(1+x); g:=1/(1-x)/(1+x);
...spectral image from elevation image image
I have an elevation satellite image that each pixel in this image has
elevation value. For example, if we select one pixe (e.g.
image(10,10)= 1300 m) which is the elevation value for this pixel
location. I need to convert this elevation image into spectral image
so that each pixel will have a spectral value (RGB value).
I would apprecaite any comments or suggestions regarding this.
...normalizing binary image
iam doing a project on signature verification, can you please suggest how can i normalize signatures to specific height and width. thanks.
On Nov 3, 8:31=A0pm, "nethra n" <pnetra...@yahoo.co.in> wrote:
> iam doing a project on signature verification, can you please suggest how=
can i normalize signatures to specific height and width. thanks.
How about finding the bounding box, then using imcrop or indexing to
crop the image, then using imresize to make it the size you want?
...Normalization of an image matrix
I need to normalize an image of size 256x256 pixels (grayscale image).My idea of normaliztion is to sum up all 256x256 pixel values and then divide each pixel value with the sum.Is there any function available in matlab for the same?
On 2/24/2011 6:11 AM, kalyani sundaram wrote:
> hello all,
> I need to normalize an image of size 256x256 pixels (grayscale image).
> My idea of normaliztion is to sum up all 256x256 pixel values and
> then divide each pixel value with the sum.Is there any function available in matlab for the same?
> Thank you
...Image Histogram Normalization
Could anyone please, help me with a code to normalize image histogram
to unit L1 norm
Anil Sudarshan wrote:
> Hi All,
> Could anyone please, help me with a code to normalize image
> to unit L1 norm
Do not expect us to do the searching for you, or do all of your work
for you. Do your own homework. If you get stuck after doing most of
the work, we will likely help you.
...Image enhancement and normalization
I would like to "normalize" images, that is, I would have all images
with the brightest pixel with intensity 100 and the darkest with
Do I have to use imadjust? or histeq?
Thanks in advance!!!!
> Hi everybody!
> I would like to "normalize" images, that is, I would have all images
> with the brightest pixel with intensity 100 and the darkest with
> intensity 0.
> Do I have to use imadjust? or histeq?
> Thanks in advance!!!!
if the maximum values in your image is lett's say B.
then to have all valu...Image matrix normalization
Lets say I have a huge matrix which represents an image as a map. I want to observe the peak values in the image. I have 3 steps for this process but I am confused.
Basically M represents global peak and m_bar is the average of local peaks which are neighbours of M.
Step 1==>Normalize values of a map between 1 to M
(multiply M/(max-min) to the map values),
to set the map values within a fixed range.
Step 2==>Compute the average value (m_bar) of the neighbors of the peak value M. Step 3==>Multiply (M − m_bar) ^2 to the map v...Normalizing grayscale image
May I know how to do normalizing on grayscale image?
And what is the difference (code) between to normalize grayscale image and RGB image?
On Dec 15, 10:20=A0pm, "sjye " <karenhoshin...@msn.com> wrote:
> May I know how to do normalizing on grayscale image?
> And what is the difference (code) between to normalize grayscale image an=
d RGB image?
How about dividing by the max value?
Seriously though, what do you really want to do? Why do you think
that normalizing may be a good thing for you to do when you...Normalized Image Size
I am applying Normalization technique on image of size 512*512. But after normalization process, getting normalized image of size " 511*513". And i want to apply apply transformation technique after this. But i am getting dimension error due to normalized image size. is there any process to resize it into 512*512 after normalization. plz help me to sort out this problem. thnx in advance.
On Feb 28, 7:50=A0am, "amitesh kumar" <amiteshkuma...@gmail.com> wrote:
> Hello Everyone
> I am applying Normalization technique on image of size 512*512. Bu...Image normalization 422528
Hello! I am constructing an coin recognition algorithm, and i have one problem.
I am using Circular Hough Transform, to draw circles with various radius around each white pixel.
the idea to find corresponding radius for each coin is to use CHT for test image R times (R is radius count)
normalize images, and then for each possible coin center (i get ~ 1-R centers) (using low thresholding) - i compare values - the highest value probably is the right radius for coin..
and this way it is 90% true..
only 90% cuz i found that if coins are close to each other, and some radiuss can ...How to Normalize gamma in image ?
How to Normalize gamma in an image ?
...Image normalization #5
I'm a research scholar. The color image(r,g,b) was normalized using r=R/R+G+B,g=G/R+G+B. b=B/R+G+B , Then i need to find indices computation Excess Green ExG=2g-r-b , Excess red Exr=1.4r-g, ExcessBlue Exb=1.4b-g and Excess green minus and excess red ExGR= ExG-ExR and color index of vegetation extraction : CIVE=0.441r-0.811g+0.385b+18.78745 . I nedda matlab coding for this.
On Jun 20, 7:27=A0am, "prema veera" <pprem...@gmail.com> wrote:
> I'm a research scholar. The color image(r,g,b) was normalized using r=3DR=
/R+G+B,g=3DG/R+G+B. b=3DB/R+G+B , Then i need...normalize retina image.
am working on the retinal images.. there are some ares near the optic disc which appears brighter which makes it diffficult to get the desired result..i need to normalize the images please help me out..
this is my the king of images am working on..
thank you in advance .
...Image Normalization #4
I am working on gesture recognition and I need some help in pre-processing the gestures. I have many images of each hand gesture but at different positions/rotations/scaling. So, I would like to rotate each image so that its major axis is oriented vertical, center the hand in the gesture image, and perform scaling so that hand region fits exactly into the gesture image. I am not able to analyze how to find the angle of rotation. Can you please suggest some references or any ideas.
Thank you for your help
...Brightness normalization of an image
Good day everyone,
I am working on a project on facial recognition.
Currently I am looking into brightness normalization of the facial images captured under different lighting and day of time.
The objective is to let the images have the same mean and unit variance.
Can anyone shed some light and guidance for me to kick start on this?
Thank you very much.
...Normalizing RGB image
Can someone please tell me what is the use of normalizing
an image? i've read that, this is to remove the effect of
any change in intensity.
can i make the intensity of 2 images similar or same?
and,how to do normalizing?
"Choo " <email@example.com> wrote in message
> Can someone please tell me what is the use of normalizing
> an image? i've read that, this is to remove the effect of
> any change in intensity.
> can i make the intensity of 2 images similar or same?
> and,how to do normalizing?...Image Normalization #3
I need source code for image normalization and inverse normalization. i tried to search in file exchange and found one file , but that is not working properly,sply its inverse normalization.i dont how its happening ,but when i am applying that normalization technique to image , it is converting most of the pixel value into 0 or very low . so i am unable to getting the watermark image after extraction from the cover image.so if any one having some idea or some other code, plz share it with me so that i can sort out my problem. thanks in advance....
How do you define normal...Binary Image to Indexed Image to RGB Image
How will we convert binary image to indexed image? And then the indexed image to RGB image in Matlab?
...Image on Image help
I'm a newbiwe trying to position one small image on top
of a larger one. Based on various examples, I'm trying the
solution below. Only problem is that it doesn't work :-(
Both x and y in the example below always seem to be 0.
Any pointers would be appreciated.
<img src="relief.jpg" width="640" height="320" id="base"/>
<img src="overlay.gif" width="10 height="10" id="overlay"/>