I need to look at the pixel intensity of a gray scale image to write some code. I have used some trivial softwares like paintshop pro earlier where you can see the pixel intensity being displayed along with the co ordinates of the pixels as you slide your mouse pointer across. In Gimp 2.8 for windows, i can see the co ordinates but not the intensity. My image is a grayscale image.
View 4 RepliesVia VBA macro, some way of getting RGB/CMYK color values of a bitmap pixel by pixel?
View 1 Replies View RelatedI'm trying to show, using the eyedropper tool, the actual values of pixels in an 8-bit grayscale image (Mode command confirms that's what's there). In the Info panel, the eyedropper tool displays percentages for every type of color information (K, CMYK), while the "8-bit" field remains blank.
View 9 Replies View RelatedI would like to somehow save the depth reading (in mm or inches) at each pixel of the image through a camera viewport. Currently, I'm using this script to save each reading in inches to a text file but it is really slow. I've learnt that OpenEXR can save a single floating-point channel image. Are there a faster way that I can save all the readings (in mm or inches) to .exr file or other format that support 32 bits single channel? If not, is it possible to scale the output (grayscale) floating point reading in exr to mm. (are they linear?) given that I set the minimum/maximum zdepth range.
script:
startFrame = 0
endFrame = 50
for frameNum = startFrame to endFrame do (
sliderTime = (int(frameNum))
fname = ("H:HAND_DATAdepthh" + (int(framenum) as string) + ".txt")
myfile = createfile (fname)
rbm = render outputsize: channels:#(#zDepth) vfbff
for y=0 to 239 do
(
[code].....
I am trying to quantitate data on some black and white microscope pictures I took, but the images are too bright in parts and I need to darken them down.
Is there a way that I can use photoshop to darken certain pixel values within the photo?
I have tried adjusting the levels in the picture so that the greys are limited, and I have tried changing the greyscale, but to no avail.
I need to make it so that two images have the same pixel values so that they can be calculated evenly.
I am loving the painting tools in Mudbox, however I cannot find a way to paint on a non diffused model. Any trick to see 1 to 1 pixel values while painting?
View 2 Replies View RelatedI managed to remove the background, of an image,(A whit background) and put the image on top of a transparent layer. made a transparent image. When I place this image over a light color background, it looks fine, but when I place it over a dark color background, the edge of the image looks very rough and dirty, I think it's because some of the anti alias from the original image, how can I make it a clean image without going to delete pixel by pixel?
View 2 Replies View Related We are developing an application using functionality of Gimp´s channel mixer with java.
Our problem is that we don’t Know how channel mix works exactly for transforming pixel by pixel in Java.
For example,
We have an image an do on it the next mix:
Output Channel = Red
Red=200.0
Green=0.0
Blue=0.0
For simulate that, we transform all pixels with Red Component *2 and 255 (maximum) if is greater.
Our problem is:
Output Channel = Red
Red=200.0
Green=60.0
Blue=0.0
How can I simulate that?
I'm using a Canon 40D, Photoshop 6 and a Mac Mini running OSX 10.8.4.
I'm loading a RAW image from my Camera into Photoshop in 16 bit mode. As I understand it, my Canon 40D has a 12-bit A/D and RAW images have a 12 bit depth out of the camera. Loading them in 8-bit depth would lose some dynamic range/resolution, so I choose to load them in 16 bit mode.
Once the RAW image is in Photoshop in 16 bits, I scroll over parts of the image with the color picker to see the pixel values. This is where I lose understanding of what's going on. The color picker shows pure white values as 32768 and pure black values as zero. Apparently Photoshop (or Camera Raw) is shifting the 12-bit camera data up to fill the top 16 bits in Photoshop. But this is not entirely true! If it truly shifted all 12 camera bits into the 12 MSBs of the 16 bit Photoshop value, wouldn't the max white value be 65535?? If the 12 bits were shifted into the 15th bit, wouldn't the max value be 32767?? Where does 32768 come from? Also, what is Photoshop putting into the LSBs after it does the shifting?
I'm trying to do some averaging of lots of low light exposures using Linear Dodge in 16 bit mode. If photoshop indeed shifts the 12-bit camera values to the MSB of the 16 bit word, I'll eventually run into clipping when I sum my images. I'd have to go to 32-bit mode and that really slows down my system, almost to the point of uselessness.
What's going on in 16-bit mode?
I am interested in setting up a plugin that is able to read the greyscale values of a defined number of pixels throughout an image, average them, and then generate shapes based on the value output.
View 3 Replies View RelatedIs it possible to read raw image data into Gimp? By raw, I mean image data without a header or compression, i.e., RGB, 16-bit unsigned, or 32-bit floating point grayscale, etc.
I see "Raw image data" under "Open > Select File Type", but grayscale isn't listed. Is the only option? Are there any add-ons for grayscale?
I have both GIMP and Digikam on my ArchLinux system.
I have set up the system so that it auto-mounts my camera when I plug it into a USB port, and I can read the images on its card using Digikam.
So far I have not been able to do this using Gimp - extensive searching using Google suggests that it should be possible File/Open/.. or File/Acquire..
I'm trying to get my head around color profiles. I created a test image with the GIMP...
and then converted it to CMYK (ISO Coated V2 300% ICI) using [URL] (I checked that the color profile data survives the upload, so if you want to try it yourself, click on the image to get it full size and then download it)
Then I compare the two images side by side on the monitor using various viewer apps. Depending on the app that I use, the colors in the converted image either look the same as the original or darker and washed out:
1) SlowView and IrfanView display the colors as identical to the original.
2) Windows photo viewer, windows explorer and the GIMP display the colors as darker.
See screen capture below of the 2 different outputs ...
So maybe some viewer apps are not reading the embedded color profile. But which one is correct? CMYK is for printing and it has a smaller range of colors, but surely if the viewer app is doing things properly, it will read the embedded profile and convert teh pixels so that they will appear very similar to the original.
(In the GIMP settings I have Edit > Preferences > Color management > File settings = 'ask what to do', but it doesnt ask me when I open the image so I am suspicious that it may not be seeing the profile information).
I am fairly new to Gimp, but love it. I am a marine biologist and I would like to use this program for my research. I do need to export the histogram values as I need to do some calculations (pixel count and value). Is there any way I can do this?
View 7 Replies View Relatedthis is probally the most noob question ever but I can't get a 1 pixel brush, 3x3 is the smallest brush I can get
View 5 Replies View RelatedWhen I choose a tool, the value(like Brush size, Opacity...) in "Tool Option" often become blank.
By the way, if I drop the "Tool Options" out of the "Tool Box", the values appears.
Im sick of writing the value of brushes i want to use like example: brush size 10 or brush size 20 or brush size 5 or less..
Whenever i touch to adjust brush size by mouse it always is like this: brush size 334 or brush size 554.. Why it is so easy to pick 400size brush and almost imposible to pick 40 size brush?
Brush are? its like 500px wide.. since when small brushes are obsolete?? i never use bigger brush than 50! and most of the time i use brushes that are less than 10(value)
So its pretty important for me(i hope not only for me) to easily pick small brush sizes..
I am trying to take a jpg file of an image, and write each RGB pixel color's value into a 3 component integer vector corresponding to the RGB components of the color for that pixel. For each pixel in the jpg, I wish to write the corresponding 3 by 1 integer vector into a matrix after which I plan to do a SVD decomposition of the newly constructed matrix to do an image analysis.
Any plug-in that allows one to efficiently iterate through each pixel in a jpg, and convert the pixel data to a RGB integer vector, and say write to a file?
Specific Details: I am using gimp 2.6 as my image editor, and wish to collect all the RGB 3 by 1 integer vectors (where each 3 by 1 integer vector corresponds to RGB color of exactly one pixel in the jpg image) into a matrix of integer so that I can do a reduced SVD decomposition of that matrix to analyse the pixel data: I wish to compare two similar images by using the SVD decomposition of integer matrices corresponding to the two images saved as jpg files pic1.jpg and pic2.jpg.
I have a picture, I am looking to take one pixel of color and copy it nearby over another pixel. How do I do this? try to inform me about the exact brush and size I need to select as I cannot figure out the correct combo to do so.
View 1 Replies View RelatedI have an image which i would like to measure the pixel intensity along a specific vector. I do not want the total pixel intensity for the entire image, i would like to draw a line, ie with the measurement tool and get a graph showing the pixel intensity as you travel along that line.
View 5 Replies View RelatedI have a plain rectangle with overall c09300c0 RGBA levels.I want to change the alpha channel value from c0 (193) to some other value, for the whole image at once. Or some other color channel.
How can I change the absolute value of a channel ? The color menu has only relative adjustments.
I have a map of a city which is segmented into different areas (based on post code boundaries). i have 5 sets of data for each area and was wondering how to display this data. one way is to present an image for each set of data. lets say the data is numbers of people. is there a way how I can relate the density of a co lour to the actual numeric value? e.g . very light yellow for 10 people, darker for 90 people and dark yellow for 350 people ( i would prefer a more defined range!!). Also, how might I use speckled colors?
View 1 Replies View RelatedGIMP 2.8.4 Windows 7 64-bit
Using the native GIMP rotate function to rotate a rectangular image about its center (for instance) the corners of the image which are exposed by the rotation are set to RGB 0x000000 with an alpha value of 0.so that these areas are transparent.
If the same operation is performed as a GEGL operation the corners have RGB values of 0x000000 but alpha values of 255 - i.e. they are solid black.
Is there a setting to cause GEGL to use alpha values of 0 for these pixels? This also applies to GEGL operations such as shear.
I have a 2013 Macbook Pro 15 with discrete graphics and plenty of RAM, so I cannot image the computer is to blame. I have 2.8.10. When using features like auto white balance it takes way too long to change the pixel colors. I have installed GIMP in parallels and it runs faster through the Windows application than it does directly on my Mac. Is this just the result of the mac build being not as refined? Is there a setting that I need to change? I have the Tile Cache on 8GB and number of processors on 8 (4 actual, 4 virtual).
View 4 Replies View RelatedI am trying to do some pixel art. what i want to do is take my concept art which is pretty good size and make a video game sprite over the top of it. So i would need to have a background image which is large and a foreground that is WAY SMALLER but lines up with it.
View 1 Replies View RelatedIs there a way to change the origin of the y-axis from the top to the bottom, with the positive being on top and negative on bottom?
Also, I notice that exact pixel coordinates are split down the center of the actual pixel. When I hover the mouse over a pixel, it will only show the correct coordinate of that pixel in the top left quadrant of that pixel. The attached picture represents a single pixel at (0,0). If I put the mouse over the red quadrant, I correctly get (0,0). If I put it over the Blue quadrants, I get (1,0) and (0,1). The Green displays as (1,1). This is rather inconvenient for me, as I'm working on pixel art, so I always have to make sure to mouse over the top left 1/4th of the pixel that I'm trying to find the coordinate of.
I'd like to accomplish:
Having a single color background with multiple thin vertical layers that will be equal distance apart, thus giving a striped look. Unfortunately, I'm having trouble positioning the layer exactly using pixel coordinates. I'm not even sure if that can be done.
I'm trying to create 1 pixel wide borders for some web buttons. I've tried to use the GIMP path tool to do this but I can't figure out how to get it looking right. See attached image.
1 - copied from a button I found on a web-page. This is what I want - single pixel horizontal and vertical lines with feathering on the curved bits.
2 - path that I used to generate the images on the right.
3 - 'Stroke Path' with 1px brush size & no antialiasing. Corners are not smooth.
4 - 'Stroke Path' with 1px brush size & anti-aliasing. Straight lines are too fuzzy as they are 2 pixel wide rather than 1.
Is there a way to do this with the path tool or any other way with the GIMP?
Due to that nature of Video, which I work in, pixels are shaped differently for televisions than they are for computers or print. Standard Deffinition is 720x480 pixels yet you can get the pixel aspect ratio in 4:3 or widescreen which is 16:9 yet it is still considered 720x480 pixels. Is there a way to compensate for this? I author DVDs for clients and would like to use GIMP to create menus for the DVDs. I can start a PSD in Adobe Encore CS4, save it as a PSD, open it in GIMP and work in more detail there yet when I save it from GIMP and open it back up in Encore, because of the pixel aspect ratio, the size of the image and menu is stuck at 4:3. Can I save 720x480 pixels in the 16:9 format or do I need to just change the pixels?
View 3 Replies View RelatedThen GIMP starts its foreground and background colors aren't black and white anymore.
I would like to know how to reset them back to default values (then program starts).
What I'm trying to do is create images (PNG) that are populated with text values and images from a database. Something I could best describe as being like a mail merge. Can I write a Gimp script to do this? Let me give you some examples that demonstrate of what I want to do:
1 - Create randomly generated Lolcat images where I pull random cat images from a database and random funny text imposed in a layer on top of the cat image
2 - Create address labels where I pull names and address from a database and impose them on top of an image of the state I'm shipping it to.
3 - Create iconography for an e-commerce website that pulls from the product catalog to display the image with text of the category, product name, and size on top if it.