The above answer that someone has suggest, converts my colored image to a black and white one. So it’s not appropriate for my question. here is the code and below is the image. Download the image and save in your pc. And try to run the above code with a correct value of path, it will throw an exception …
Tag: bufferedimage
How to create 8-bit PNG from BufferedImage?
I have a Java program that creates composite png images that contain only black pixels and 100% transparent pixels. I am trying to reduce the size of these composites as much as possible and I notice that ImageIO.write always outputs 32 bit PNG’s. I would like to instead save them as 8-bit considering t…
Java: Filling a BufferedImage with transparent pixels
I have an off-screen BufferedImage, constructed with the type BufferedImage.TYPE_INT_ARGB. It can contain anything, and I’m looking for a way to (fairly efficiently) completely overwrite the image with transparent pixels, resulting in an ‘invisible’ image. Using something like this: Has no e…
How to scale a BufferedImage
Following the javadocs, I have tried to scale a BufferedImage without success here is my code: I can’t understand why it is not working, any help? Answer AffineTransformOp offers the additional flexibility of choosing the interpolation type. The fragment shown illustrates resampling, not cropping; this …
How to check a uploaded file whether it is an image or other file?
In my web application I have an image uploading module. I want to check the uploaded file whether it’s an image file or any other file. I am using Java in server side. The image is read as BufferedImage in java and then I am writing it to disk with ImageIO.write() How shall I check the BufferedImage, wh…
Why does a BufferedImage require so much memory beyond the size of its data array?
I’m trying to determine how much heap any given TYPE_INT_ARGB BufferedImage will use so that, for a program which is doing some image processing, I can set a reasonable max heap based on the size of image we feed it. I wrote the following program as a test, which I then used to determine the least maxim…