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private void ProcessImage(Image image) { if (image == null) { return; } using (var selectedImage = new Bitmap(image)) If the image is already a bitmap … It's probably worth having two cases and factoring out the code which works with Bitmap to a separate method: if (image is Bitmap) Process(image as Bitmap); else using (var bitmap = new Bitmap …

/// <summary> /// Do all properties have the same value? /// Usefull when determining if a Photo has been modified since last loaded /// </summary> Perhaps the problem is at a high …

One useful performance trick when dealing with low-level pixel manipulations like this is that it's often possible to process red and blue together using the 8 bits for green as a gap. Since here you' …

Extract all the pages as images. Upload the images to blob storage. For each test (i.e. set of images), queue another routine to process it. Do you not think that's quite a lot to do in …

What if the image isn't of TYPE_INT_ARGB? … The more robust way of doing this would be to create a fresh IIOMetadata for each image, using new ImageTypeSpecifier(img) to create an appropriate ImageTypeSpecifier for each one. …

Spell-check: ReleaseIamge should presumably be ReleaseImage; uique should be unique. private static void ReleaseMemoryStream(int id) { MemoryStream ms = null; if (images.Try …

The benefit of async/await with something like image processing is that you can keep the CPU busy even when one of the coroutines is blocked on I/O. … If you want to make an async version, the image load should be async. …

Henrik covered a number of points which I would have raised, so I won't repeat those. namespace TIFF { public class Jpeg seems inconsistent to me. The convention in .Net is to camel-case ac …

var zipFile = ZipFile.OpenRead(ChapterLocation); ... zipFile.Dispose(); One word: using. using (var stream = z.Open()) { using (var mstream = new MemoryStream()) …

In terms of possible speed optimisations there's not much to work with, but one thing does stand out: def func(t, a, b, c, d, e, f): return a+ b*t+ c*(b*t)**2+ d*(b*t)**3+ e*(b*t …

image) { var bitmap = image as Bitmap; if (bitmap ! … = null) { return IsOpaque(bitmap); } using (bitmap = new Bitmap(image)) { return IsOpaque(bitmap); } } Now, taking into account …

There's already a good answer, so I'm just going to raise a couple of small points. I had the same thought as Toby Speight about saving the square root of abs(z), but I would apply it also in the log …

The other thing which would probably give a moderate speedup is changing the way the image is divided into chunks. … Image formats are compressed: you will get better performance if the way you access the image respects the compression format. …