Most time takes b=(BYTE)a . And it is impossible to make it works faster.

basic time takes operation b=a. its bad.

same result :/

No! its useless :(

This block processing takes 3/4 of all code time.

b is BYTE, a is float. I'm making convolution of 2 matrix. they are BYTE type. So i need to control bounds.

thanx, but i need fast, not elegant:) such construction works even slowly.

I have such block: if (a > 0) if (a > 255) b = 255; else b = (BYTE)a; else b = 0; do anyone have an idea, how to make it works faster? Thanx.

visit www.NCTSoft.com . I think there is what u need. NCTVisualStudio is really good set of activeX libraries.

Thanx a lot. Problem is solved. Now problem is in Gaussing blur. It takes 120 ms for 720*575 image. We wana it takes not more than 40-50 ms. I think only assembler realisation of algorithm can improve performance.

Essentialy i do not need to fill objects. I need to know sizes and locations of objects in image. Image is an array of pixels (BYTE). I need simething like this: http://rsb.info.nih.gov/ij/docs/menus/analyze.html But here is too compound system and its makes too much unuseless calculations. And sources are on Java, and I wanna use it in vc++. This system find all object in one cycle, so its very quick. P.S. no, no more processes except quickfill and opera. i think its becouse memory in windows assignes in such way.

Yes, I've read your article, it's really good. But QuickFill makes floodfill only of one object. So, to fill 10 objects on the image i need to call quickfill 10 times. I wanna to fill theese 10 objects simultaneously, in 1 call. Because if i 10 times look for object, then fill them it takes too much time. John, i find 1 interesting thing. When i testing your programm, Opera brouser worked. And filling of one object takes 8 milliseconds. When i closing Opera, filling of 1 object takes 23 millisecondes:-)

I have a BYTE array of pixels, which describes am image. Image is black - white. Pixels have 255 and 0 values. If pixels are white - this is object, black - background. I wanna know sizes and locations of all objects on image. If i use standart recursive floodfill algorithm for every object by turns it takes too much time to scan whole image, find object, use to object floofill and to get size and location of the object. Do anybody know fast algoritmh for simultaneously detecting of all objects on image(BYTE array)?