#Pixelstick coverting to bmp how to#
#Pixelstick coverting to bmp plus#

Size: 1,209,738 bytes (something like 3 bytes per pixel, plus metadata) I can get visually correct 4-level grayscale image, but wrong depth or size per pixel: Color Model: RGB With the command below, convert pic.png -colorspace gray +matte -depth 2 out.bmp

Further down there are some 0s, 1s and 2s representing black, dark gray and light gray: The 3s represent white pixels at the beginning of the image. The Hex values of the beginning part of the sample BMP image: Size: 240,070 bytes (4 bits per pixel but only last 2 bits are used to identify the gray scales as 0/1/2/3 in decimal or 0000/0001/0010/0011 in binary, plus 70 bytes BMP metadata or whatever) The sample image has the following properties: Color Model: RGB I need to convert images to 2-bit per pixel grayscale BMP format. Image = Image.open(io.First of all, my question is different to How do I convert image to 2-bit per pixel? and unfortunately its solution does not work in my case. This is (one version of) my program: import io I'm also not sure if the byte array I'm making is an array of the individual bytes or some representation of the whole list.Ĭan someone help me save this list of numbers as an image? I don't know if I actually need to save it as a bitmap. But also, saving some bytes as an image seems a lot more complicated than I thought, so frankly, I don't even know where to begin. I'm guessing part of the problem is that I'm not saving data that uses bitmap headers. Or, I just save a file that can't be opened because it's an unsupported file format (e.g. Depending on what I try, I get errors like the following: OSError: cannot identify image file 'out.bmp'ĪttributeError: 'BitMap' object has no attribute 'save' I've written something that converts a list of ints into either bytes or a 'bytearray' (I've just tried a lot of different things, and I'm not sure which format I actually need), but then I get stuck when I try to save those bytes as a bmp file. The numbers above supposedly correspond to this picture: (which is not greyscale). Looking at the source, this particular library's bitmap class seems kind of useless for what I want to do.

#Pixelstick coverting to bmp how to#

I've also tried this library and I think I successfully converted the list into a string representing bits, and into this library's version of a bitmap, but I can't figure out how to save the resulting object. How do I convert byte array to bitmap image in Python? Converting int to bytes in Python 3 Image from bytes (python) PIL: Convert Bytearray to Image Convert Numpy array of ASCII codes to string I've referred to the following stackoverflow posts (and a few others) to try and convert the list of ints into an actual image file: If I'm overcomplicating this then I'd also appreciate some more direction! The way I'm trying to go about this is by converting these lists of ints into bytes (or arrays of bytes that they represent), then converting them into bitmap image files (and possible saving them to disk - that's the step I'm stuck at), and then I'll OCR those images (either in python with tesseract or maybe with Adobe's OCR if I can put them in a pdf) to determine their UTF-8 or Shift-JIS equivalents. I'm trying to get at the actual characters these represent. I have this json file of a character mapping for a font (an image-based font, used by a Japanese dictionary) where each character is represented as a bitmap image, e.g. I don't know the shape of the image, but I think it might be 4 wide by 8 tall. I'd prefer to be able to visualize the images, though, to make sure the conversion actually worked properly. I'm trying to convert a list of numbers that I believe represent bytes that together constitute a bitmap image, into said image file (saved to disk) and/or simply converted into a form usable by tesseract.