<------This is an image I made in Photoshop...
It's basically a 160 x 160 box of white with a texture applied.
Below is what it looks like with "background-repeat" in the CSS. I was hoping it'd balance out. Is there a certain percentage the textile has to be at, or size of the original box? For it to be a perfect repeatable texture?
Im trying to do this myself, since I cant find grid patterns that fit the style.
Question: Whats the trick on making textures in Photoshop, that appear as balanced whole backgrounds when repeated?
If you look at the below image where it's in effect, on the very basic start of what Im working on, you can notice it doesnt quite fit together.
Any and all help greatly appreciated. Thanks in advance.
If you want that background for a webpage is better the use of repeating-linear-gradient. It is very easy of implement, less assets to download and it is supported by major browsers.
Look in the top left corner of your image. You'll note that the dark line starts at roughly 4-5 pixels from the top. Then look at the top right corner, and you'll note that the top line starts at just perhaps 2px from the top.
When this image is repeated twice side by side, there will be a disconnect. Just crop the image and shave off the two or three pixels until your lines connect. Repeat by cropping the bottom of the image for vertical alignment.
If you want to do this experimentally, increase the size of your canvas, and copy the pattern into a new 160x160 layer. Place them side by side, and then move the layers one pixel at a time so that they overlap. Where the overlap aligns is where you should crop the image.
Related
I am a beginner at graphics and I was wondering if anyone had any experience in programmatically splitting isometric tile sheets, in particular Reiner Tile Sheets Here is an Example Image:
.
I have been splitting it using guides by hand in gimp but there is some sort of pattern going on that I feel can be used to programmatically split this. Before I tried to make my own, I wanted to see if there was any such algorithms premade / software that could do it currently. Its not a simple grid that needs to be cut with same width and height for each one. Thanks for the help!
Some stuff for thinking and read
First take a look at:
2D Diamond (isometric) map editor - Textures extended infinitely?
for some inspiration. Especially take a look at (3. tile editor) part. The operations described there are exactly what you are looking for (to add the missing stuff you are doing manually right now).
However your tile set is oriented differently so the masks will be slightly different ...
In case you want to extract tileset from image you would need something like this:
Grid image values to 2D array
And also take a look at this (for even more inspiration):
Improving performance of click detection on a staggered column isometric grid
The pixel perfect O(1) mouse selection at the end is a good idea to implement.
Your tile map
so you have a tilemap image but you do not have the tiles boundaries. So first identify tileset resolution... There might be more tile sizes present so you need to know all of them. Your image is 256x1024 pixels and from a quick look you have 32x32 pixels tiles. Most of the tiles are 64x64 however they are constructed from 4 tiles of 32x32 pixels. The white color is the transparent one. So you just divide the image to 32x32 squares or regroup to 64x64 ones.
I am filtering an image so that it removes noise from them.
This image corresponds to a patent plate, and to detect the letters I need them to be without noise.
Original image:
Output:
Any way to make that 5 able to remove white part from above? or decrease it
I have a couple of images like this with that problem, which occurs when I transform the image horizontally. Any help is welcome.
With just low-level operations (filters), you can't reduce the black area on the top because is it of the same nature as the characters themselves. Any action you take against this zone will also damage the characters. No filter will work satisfactorily.
Hence you must use some extra contextual information such as "against the top edge", and possibly "forming a straight edge". Even so, finding the exact border with the 5 is challenging.
enter image description here
My goal is to take the image above and "open" it along the center so that the 9 black doublets are in a straight line rather than in a circle. I have tried using the cv2.toPolar() function in OpenCV but the image is quite distorted, as can be seen below:
enter image description here
I am attempting to try a different approach now. From the center, I would like to access each of the doublet individually, like a pizza slice, and place them side by side
Initially I was thinking of slicing each doublet using two lines from the center of the image to the mid point between the doublets on either side.
My question is: how can I draw contours from the center of the image to the edge of the image, passing through the mid point between any two doublet. If I can draw one, I know that the angle between any two such consecutive contour is 40 degrees.
Any help is greatly appreciated!
I noted a few problems here:
The toPolar() conversion might have been around the center of the image file, but it is not the center of the object. This causes part of the distortion. If you share your code, I could try playing with the code and improving it.
2.The object is somewhat elliptical, not circular. This means you will still have a wave after correcting the above problem.
If you don't mind a semi-automatic solution, you could use OpenCV mouse events to specify the first line and let the program use the 40 degree angle to calculate the rest.
I need to be able to turn a black and white image into series of lines (start, end points) and circles (start point, radius). I have a "pen width" that's constant.
(I'm working with a screen that can only work with this kind of graphics).
Problem is, I don't want to over complicate things - I could represent any image with loads of small lines, but it would take a lot of time to draw, so I basically want to "approximate" the image using those lines and circles.
I've tried several approaches (guessing lines, working area by area, etc) but none had any reasonable results without using a lot of lines and circles.
Any idea on how to approach this problem?
Thanks in advance!
You don't specify what language you are working in here but I'd suggest OpenCV if possible. If not, then most decent CV libraries ought to support the features that I'm about to describe here.
You don't say if the input is already composed of simple shapes ( lines and polygons) or not. Assuming that it's not, i.e. it's a photo or frame from a video for example, you'll need to do some edge extraction to find the lines that you are going to model. Use a Canny or other edge detector to convert the image into a series of lines.
I suggest that you then extract Circles as they are the richest feature that you can model directly. You should consider using a Hough Circle transform to locate circles in your edge image. Once you've located them you need to remove them from the edge image (to avoid duplicating them in the line processing section below).
Now, for each pixel in the edge image that's 'on' you want to find the longest line segment that it's a part of. There are a number of algorithms for doing this, simplest would be Probabilistic Hough Transform (also available in openCV) to extract line segments which will give you control over the minimum length, allowed gaps etc. You may also want to examine alternatives like LSWMS which has OpenCV source code freely available.
Once you have extracted the lines and circles you can plot them into a new image or save the coordinates for your output device.
Above are four images of a character walking along the ground from the bottom right towards the upper left. You can see that the drawing order isn't correct in the third panel.
There doesn't seem to be a "correct order" here. For example if instead of a small guy we had a sprite of a looooong cat going through the door, then no matter if you draw the door first or the cat first, it would be wrong.
How do other game engines handle this? Some hack to prevent this situation from happening? Draw a z-buffer by hand? Some other option that didn't occur to me?
The trick is simply to split the tile into pieces. Draw the right half of the arch, then the character, and then the left half.
An alternative to splitting the tile is to just render everything with z-values and a z-buffer like a proper 3d app would. If you generate your graphics in a 3D package you can probably generate the relative z values at the same time.