**What is the difference between graylevel image and intensity normalized image?**Dear all
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**Hi,
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)
k= 255/max{R,G,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?
Thanks,
Sara
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......
Cheers
Thomas Stoltz
"maciek" <maciek240281@interia.pl> wrote in message
news:eeddecd.-1@webx.raydaftYaTP...
> 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?
...

**Normalizing Image**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...

**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**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
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**Hi All,
Could anyone please, help me with a code to normalize image histogram
to unit L1 norm
Thanks,
Anil
Anil Sudarshan wrote:
>
>
> Hi All,
> Could anyone please, help me with a code to normalize image
> histogram
> to unit L1 norm
> Thanks,
> Anil
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.
Dav
...

**Image enhancement and normalization**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!!!!
Max wrote:
> 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!!!!
Hi Max,
if the maximum values in your image is lett's say B.
then to have all valu...

**Image matrix normalization**Hi
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**Hello Everyone
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 ?**Hi guys,
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.
Thanks
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.**sir,
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..
http://www.flickr.com/photos/47530846@N05/4359521023/
this is my the king of images am working on..
thank you in advance .
...

**Image Normalization #4**Hi all,
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.
robin
...

**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 " <cyching84@yahoo.com.au> wrote in message
<g3c94m$d66$1@fred.mathworks.com>...
> 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**hello
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....
amitesh kumar:
How do you define normal...

**image normalization for pattern recognition**Dear all,
Do anyone how to implement the theory of image
normalization based on geometric moments in Matlab? This
normalization is mainly on three steps to make it become a
compact image and then with the compact image, we make it
invariant to rotational which at last is the normalize
image. the main ideal is from the paper entitled "image
normalization for pattern recognition" from then author
Soo-Chang Pei and Chao-Nan Lin. I myself had developed a
code but i couldn't get the desired result. If you need to
see the code i can paste out here as a reference. Hope
so...

**image normalization #2 396713**hi all
how to normalize an image from 0 to 1 ?
what i'm doing is as foloows :
BG_img = imread('BG.tiff');
BGfft = fft2(BG_img);
noise_img = BGfft * (conj(BGfft));
and the to normalize the output is :
C = mat2gray(noise_img, [0 1]);
is this right ?
I don't think so.
Don't you want
noise_img = BGfft .* (conj(BGfft)); % Element by element
multiplcation
instead of
noise_img = BGfft * (conj(BGfft)); % Matrix multiplication.
what i'm trying to do here is to get the ( normilized )power spectrum density of the image ... so would i use th...

**normalization of images of gaussian pyramid**hai
i want to use the center-surround technique for target detection. in order to calculate the center-surround difference, intially i have calculated gaussian pyramid then i have applied LOG filter. now i want to normalize the images in each level of the pyramid.
can any one explain me how to normalize these images?
On May 12, 2:07=A0pm, "sreebhanu v" <bhanusri_vag...@yahoo.com> wrote:
> hai
> i want to use the center-surround technique for target detection. in orde=
r to calculate the center-surround difference, intially i have calculated g=
aussian pyramid then...

**Normalization Intensity Gray Image**Hi
I would like to normalization Intensity Gray Image with values between 0 to 64,000 to be between 0 to 1
How can I do so?
Thanks
On Nov 26, 3:39=A0am, maxwell10 <maxwell...@hotmail.com> wrote:
> Hi
> I would like to normalization Intensity Gray Image with values between 0 =
to 64,000 to be between 0 to 1
> How can I do so?
> Thanks
----------------------------------------------------------------------
Try scaling your image. Look at this snippet of code:
originalMinValue =3D double(min(min(grayImage)))
originalMaxValue =3D double(max(max(grayImage)))
origin...