- 浏览: 2532777 次
- 性别:
- 来自: 苏州
文章分类
最新评论
-
jsntghf:
peio 写道这个怎么运行?Ruby On Rails的环境搭 ...
多文件上传之uploadify -
peio:
这个怎么运行?
多文件上传之uploadify -
往事如烟1:
我的项目是自己init了一个原始的project,之后将ver ...
React Native热部署之CodePush -
jsntghf:
往事如烟1 写道我按照你的说明进行,发现app退出之后,在进入 ...
React Native热部署之CodePush -
往事如烟1:
我按照你的说明进行,发现app退出之后,在进入不正确,请问是什 ...
React Native热部署之CodePush
ImageUtil.h
#import <Foundation/Foundation.h> #include <OpenGLES/ES1/gl.h> #include <OpenGLES/ES1/glext.h> @interface ImageUtil : NSObject + (CGSize) fitSize: (CGSize)thisSize inSize: (CGSize) aSize; + (UIImage *) image: (UIImage *) image fitInSize: (CGSize) viewsize; + (UIImage *)blackWhite:(UIImage *)inImage; + (UIImage *)cartoon:(UIImage *)inImage; + (UIImage *)memory:(UIImage *)inImage; + (UIImage *)bopo:(UIImage *)inImage; + (UIImage *)scanLine:(UIImage *)inImage; @end
ImageUtil.m
#import "ImageUtil.h" #include <sys/time.h> #include <math.h> #include <stdio.h> #include <string.h> CGContextRef CreateRGBABitmapContext (CGImageRef inImage) { CGContextRef context = NULL; CGColorSpaceRef colorSpace; void *bitmapData; int bitmapByteCount; int bitmapBytesPerRow; size_t pixelsWide = CGImageGetWidth(inImage); size_t pixelsHigh = CGImageGetHeight(inImage); bitmapBytesPerRow = (pixelsWide * 4); bitmapByteCount = (bitmapBytesPerRow * pixelsHigh); colorSpace = CGColorSpaceCreateDeviceRGB(); if (colorSpace == NULL) { fprintf(stderr, "Error allocating color space\n"); return NULL; } bitmapData = malloc( bitmapByteCount ); if (bitmapData == NULL) { fprintf (stderr, "Memory not allocated!"); CGColorSpaceRelease( colorSpace ); return NULL; } context = CGBitmapContextCreate(bitmapData, pixelsWide, pixelsHigh, 8, bitmapBytesPerRow, colorSpace, kCGImageAlphaPremultipliedLast); if (context == NULL) { free (bitmapData); fprintf (stderr, "Context not created!"); } CGColorSpaceRelease(colorSpace); return context; } unsigned char *RequestImagePixelData(UIImage *inImage) { CGImageRef img = [inImage CGImage]; CGSize size = [inImage size]; CGContextRef cgctx = CreateRGBABitmapContext(img); if (cgctx == NULL) return NULL; CGRect rect = {{0, 0}, {size.width, size.height}}; CGContextDrawImage(cgctx, rect, img); unsigned char *data = CGBitmapContextGetData (cgctx); CGContextRelease(cgctx); return data; } #pragma mark - @implementation ImageUtil + (CGSize) fitSize: (CGSize)thisSize inSize: (CGSize) aSize { CGFloat scale; CGSize newsize; if(thisSize.width < aSize.width && thisSize.height < aSize.height) { newsize = thisSize; } else { if(thisSize.width >= thisSize.height) { scale = aSize.width / thisSize.width; newsize.width = aSize.width; newsize.height = thisSize.height * scale; } else { scale = aSize.height / thisSize.height; newsize.height = aSize.height; newsize.width = thisSize.width * scale; } } return newsize; } + (UIImage *) image: (UIImage *) image fitInSize: (CGSize) viewsize { CGSize size = [ImageUtil fitSize:image.size inSize:viewsize]; UIGraphicsBeginImageContext(size); CGRect rect = CGRectMake(0, 0, size.width, size.height); [image drawInRect:rect]; UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return newimg; } #pragma mark - + (UIImage *)blackWhite:(UIImage *)inImage { unsigned char *imgPixel = RequestImagePixelData(inImage); CGImageRef inImageRef = [inImage CGImage]; GLuint w = CGImageGetWidth(inImageRef); GLuint h = CGImageGetHeight(inImageRef); int wOff = 0; int pixOff = 0; for(GLuint y = 0;y< h;y++) { pixOff = wOff; for (GLuint x = 0; x < w; x++) { int red = (unsigned char)imgPixel[pixOff]; int green = (unsigned char)imgPixel[pixOff + 1]; int blue = (unsigned char)imgPixel[pixOff + 2]; int bw = (int)((red+green + blue) / 3.0); imgPixel[pixOff] = bw; imgPixel[pixOff + 1] = bw; imgPixel[pixOff + 2] = bw; pixOff += 4; } wOff += w * 4; } NSInteger dataLength = w * h * 4; CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, imgPixel, dataLength, NULL); int bitsPerComponent = 8; int bitsPerPixel = 32; int bytesPerRow = 4 * w; CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB(); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault; CGImageRef imageRef = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent); UIImage *my_Image = [UIImage imageWithCGImage:imageRef]; CFRelease(imageRef); CGColorSpaceRelease(colorSpaceRef); CGDataProviderRelease(provider); return my_Image; } + (UIImage *)cartoon:(UIImage *)inImage { unsigned char *imgPixel = RequestImagePixelData(inImage); CGImageRef inImageRef = [inImage CGImage]; GLuint w = CGImageGetWidth(inImageRef); GLuint h = CGImageGetHeight(inImageRef); int wOff = 0; int pixOff = 0; for(GLuint y = 0;y < h;y++) { pixOff = wOff; for (GLuint x = 0; x < w; x++) { int red = (unsigned char)imgPixel[pixOff]; int green = (unsigned char)imgPixel[pixOff + 1]; int blue = (unsigned char)imgPixel[pixOff + 2]; int ava = (int)((red + green + blue) / 3.0); int newAva = ava > 128 ? 255 : 0; imgPixel[pixOff] = newAva; imgPixel[pixOff + 1] = newAva; imgPixel[pixOff + 2] = newAva; pixOff += 4; } wOff += w * 4; } NSInteger dataLength = w * h * 4; CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, imgPixel, dataLength, NULL); int bitsPerComponent = 8; int bitsPerPixel = 32; int bytesPerRow = 4 * w; CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB(); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault; CGImageRef imageRef = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent); UIImage *my_Image = [UIImage imageWithCGImage:imageRef]; CFRelease(imageRef); CGColorSpaceRelease(colorSpaceRef); CGDataProviderRelease(provider); return my_Image; } + (UIImage *)memory:(UIImage *)inImage { unsigned char *imgPixel = RequestImagePixelData(inImage); CGImageRef inImageRef = [inImage CGImage]; GLuint w = CGImageGetWidth(inImageRef); GLuint h = CGImageGetHeight(inImageRef); int wOff = 0; int pixOff = 0; for(GLuint y = 0;y < h;y++) { pixOff = wOff; for (GLuint x = 0; x < w; x++) { int red = (unsigned char)imgPixel[pixOff]; int green = (unsigned char)imgPixel[pixOff + 1]; int blue = (unsigned char)imgPixel[pixOff + 2]; red = green = blue = ( red + green + blue ) / 3; red += red * 2; green = green * 2; if(red > 255) red = 255; if(green > 255) green = 255; imgPixel[pixOff] = red; imgPixel[pixOff + 1] = green; imgPixel[pixOff + 2] = blue; pixOff += 4; } wOff += w * 4; } NSInteger dataLength = w * h * 4; CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, imgPixel, dataLength, NULL); int bitsPerComponent = 8; int bitsPerPixel = 32; int bytesPerRow = 4 * w; CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB(); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault; CGImageRef imageRef = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent); UIImage *my_Image = [UIImage imageWithCGImage:imageRef]; CFRelease(imageRef); CGColorSpaceRelease(colorSpaceRef); CGDataProviderRelease(provider); return my_Image; } + (UIImage*)bopo:(UIImage*)inImage { unsigned char *imgPixel = RequestImagePixelData(inImage); CGImageRef inImageRef = [inImage CGImage]; GLuint w = CGImageGetWidth(inImageRef); GLuint h = CGImageGetHeight(inImageRef); int i, j, m, n; int bRowOff; int width = 8; int height = 8; int centerW = width / 2; int centerH = height / 2; int modw = w % width; int modh = h % height; if(modw) w = w - modw; if(modh) h = h - modh; int br, bg, bb; int tr, tg, tb; double offset; NSMutableArray *wei = [[NSMutableArray alloc] init]; for(m = 0; m < height; m++) { NSMutableArray *t1 = [[NSMutableArray alloc] init]; for(n = 0; n < width; n++) { [t1 addObject:[NSNull null]]; } [wei addObject:t1]; [t1 release]; } int total = 0; int max = (int)(pow(centerH, 2) + pow(centerW, 2)); for(m = 0; m < height; m++) { for(n = 0; n < width; n++) { offset = max - (int)(pow((m - centerH), 2) + pow((n - centerW), 2)); total += offset; [[wei objectAtIndex:m] insertObject:[NSNumber numberWithDouble:offset] atIndex:n]; } } for(m = 0; m < height; m++) { for(n = 0; n < width; n++) { double newVal = [[[wei objectAtIndex:m] objectAtIndex:n] doubleValue] / total; [[wei objectAtIndex:m] replaceObjectAtIndex:n withObject:[NSNumber numberWithDouble:newVal]]; } } bRowOff = 0; for(j = 0; j < h; j += height) { int bPixOff = bRowOff; for(i = 0; i < w; i += width) { int bRowOff2 = bPixOff; tr = tg = tb = 0; for(m = 0; m < height; m++) { int bPixOff2 = bRowOff2; for(n = 0; n < width; n++) { tr += 255 - imgPixel[bPixOff2]; tg += 255 - imgPixel[bPixOff2 + 1]; tb += 255 - imgPixel[bPixOff2 + 2]; bPixOff2 += 4; } bRowOff2 += w * 4; } bRowOff2 = bPixOff; for(m = 0; m < height; m++) { int bPixOff2 = bRowOff2; for(n = 0; n < width; n++) { offset = [[[wei objectAtIndex:m] objectAtIndex:n] doubleValue]; br = 255 - (int)(tr * offset); bg = 255 - (int)(tg * offset); bb = 255 - (int)(tb * offset); if(br < 0) br = 0; if(bg < 0) bg = 0; if(bb < 0) bb = 0; imgPixel[bPixOff2] = br; imgPixel[bPixOff2 + 1] = bg; imgPixel[bPixOff2 + 2] = bb; bPixOff2 += 4; } bRowOff2 += w * 4; } bPixOff += width * 4; } bRowOff += w * height * 4; } [wei release]; NSInteger dataLength = w * h * 4; CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, imgPixel, dataLength, NULL); int bitsPerComponent = 8; int bitsPerPixel = 32; int bytesPerRow = 4 * w; CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB(); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault; CGImageRef imageRef = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent); UIImage *my_Image = [UIImage imageWithCGImage:imageRef]; CFRelease(imageRef); CGColorSpaceRelease(colorSpaceRef); CGDataProviderRelease(provider); return my_Image; } + (UIImage *)scanLine:(UIImage *)inImage { unsigned char *imgPixel = RequestImagePixelData(inImage); CGImageRef inImageRef = [inImage CGImage]; GLuint w = CGImageGetWidth(inImageRef); GLuint h = CGImageGetHeight(inImageRef); int wOff = 0; int pixOff = 0; for(GLuint y = 0;y < h;y += 2) { pixOff = wOff; for (GLuint x = 0; x < w; x++) { int red = (unsigned char)imgPixel[pixOff]; int green = (unsigned char)imgPixel[pixOff + 1]; int blue = (unsigned char)imgPixel[pixOff + 2]; int newR, newG, newB; int rr = red * 2; newR = rr > 255 ? 255 : rr; int gg = green * 2; newG = gg > 255 ? 255 : gg; int bb = blue * 2; newB = bb > 255 ? 255 : bb; imgPixel[pixOff] = newR; imgPixel[pixOff + 1] = newG; imgPixel[pixOff + 2] = newB; pixOff += 4; } wOff += w * 4 * 2; } NSInteger dataLength = w * h * 4; CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, imgPixel, dataLength, NULL); int bitsPerComponent = 8; int bitsPerPixel = 32; int bytesPerRow = 4 * w; CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB(); CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault; CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault; CGImageRef imageRef = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent); UIImage *my_Image = [UIImage imageWithCGImage:imageRef]; CFRelease(imageRef); CGColorSpaceRelease(colorSpaceRef); CGDataProviderRelease(provider); return my_Image; } @end
效果图:
- ImageProcessingDemo.zip (66.2 KB)
- 下载次数: 11
发表评论
-
Error watching file for changes: EMFILE
2016-12-15 11:57 1302执行npm start后报错: Error watc ... -
CocoaPods升级1.1.1报错
2016-12-15 08:39 795ERROR: While executing gem .. ... -
Visual Studio Code运行React Native报错
2016-06-13 09:43 1614React Native:0.27.2 React:15 ... -
React Native 0.27.2编译报错this._nativeModule.addListener is not a function
2016-06-12 15:21 3857React Native:0.27.2 React:15 ... -
Unable to resolve module ReactDefaultPerf from
2016-06-02 13:04 2785package.json信息如下: "reac ... -
React Native 0.26.2编译报错Undefined symbols for architecture x86_64
2016-05-26 11:15 2019React Native:0.26.2 React:15. ... -
Failed to update auto layout status: Failed to load designables from path (null)
2016-04-05 22:11 1714确保CocoaPods是0.36.1以上版本,然后在podf ... -
集成微信支付出现Undefined symbols for architecture x86_64错误
2016-03-21 13:22 1751Undefined symbols for architec ... -
React Native热部署之CodePush
2016-01-10 22:27 6247本文使用的环境是Mac OS 10.11.1、Xcode ... -
浅谈React Native中的FlexBox布局
2015-11-17 18:38 4305React Native通过一个基于FlexBox的布局引 ... -
React Native之构建一个简单的列表页
2015-10-23 14:45 2165本文中我们将创建一个简单的电影应用,这个应用将从Rotten ... -
React Native之环境搭建
2015-10-20 16:30 1446本文使用的环境是Mac O ... -
获取图片属性的方法
2015-10-18 20:43 3145很多时候我们需要获 ... -
NSCache的下标用法
2015-09-18 00:19 1216NSCache类和NSDictionary类很相似,也提供 ... -
如何给category添加属性
2015-08-16 10:41 692主要是使用了runtime中的associative机制。 ... -
UITableView的两种重用Cell方法的区别
2015-08-10 13:07 16149UITableView中有两种重用Cell的方法: - ... -
SDImageCache.m报错Unused variable 'fileName'
2015-08-04 21:56 1175GCC手册中的相关解释: unused:This att ... -
Swift调用Objective-C
2015-07-13 23:33 1228Swift调用Objective-C需要一个名为<工程 ... -
使用GCD实现倒计时
2015-07-24 21:47 1085__block int timeout = 60; // ... -
导航栏加分割线的实现
2015-07-01 22:00 1763self.view.backgroundColor = [U ...
相关推荐
使用 Python 完成简单图像处理 本文主要介绍了使用 Python 完成简单图像处理的方法和相关技术。图像处理是计算机视觉和图像处理领域的重要组成部分,而 Python 语言则是完成简单图像处理任务的理想选择。下面将对...
"简单图像处理_汇编源码"这个项目可能就是展示了如何利用汇编语言进行基本的图像操作。 汇编语言是计算机底层编程的一种语言,它直接对应于机器指令,每一个汇编指令都可以转化为一个具体的CPU操作。在图像处理中,...
本项目"vc6.0简单图像处理应用程序"提供了一个基于CView类的图像处理解决方案,这相较于常见的使用ScrollView的实现方式,更便于集成到其他项目中。 Visual C++ 6.0(简称VC6.0)是微软发布的一款经典的老版C++...
由于目前的图像处理软件往往将算法封装起来,不利于学习和理解图像处理知识,因此本文采用MATLAB作为开发平台,设计并实现了一个简单的数字图像处理系统。该系统以图形用户界面(GUI)为交互方式,功能模块分为采集、...
本教程“opencv 001 简单图像处理”是针对初学者的入门指南,旨在帮助用户了解如何在Visual Studio 2015(VS2015)环境中使用OpenCV进行基本的图像操作。 首先,安装OpenCV是开始的第一步。这通常涉及下载OpenCV的...
本项目是基于C++编写的简单图像处理系统,其主要功能包括高斯平滑和拉普拉斯锐化,这些都是图像处理中常见的滤波技术。 高斯平滑,又称为高斯滤波,是一种线性滤波方法,主要用于消除图像中的噪声。它使用一个高斯...
3、数字图像的增强处理功能: (1)空域中的点运算、直方图的均衡化、各种空间域平滑算法(如局部平滑滤波法、中值滤波等)、锐化算法(如梯度锐化法、高通滤波等) (2)频域的各种增强方法:频域平滑、频域锐化、...
实现简单图像处理,包括256色转灰度图、Hough变换、Walsh变换、中值滤波、二值化变换、亮度增减、傅立叶变换、反色、取对数、取指数、图像平移、图像旋转、图像细化、图像缩放、图像镜像、均值滤波、对比度拉伸、...
本项目"简单图像处理 c++"旨在提供一个基础的图像操作平台,用户可以进行图片的打开、显示和保存操作。下面我们将详细探讨相关的知识点。 1. 图像文件格式:图像文件有多种格式,如BMP(位图)、JPEG(联合图像专家...
设计并实现一个具有简单图像处理功能的小软件,并提供图形用户界面对其操作和交互。通过对该软件的设计,将实践与理论结合,从而使同学能更好地理解课程中的内容。 一、设计并实现图形化界面(选做,完成有额外加分...
用c#开发的一个简单图像处理软件,功能如下: 1.图像文件的打开、保存、格式转换 2.图像的复制、粘贴 3.图像的彩色灰度转换、反色效果、图像的锐化、柔化、雾化处理 4.显示效果:百叶窗、翻转、上下拉伸、左右拉伸、...
实现简单图像处理,包括256色转灰度图、Hough变换、Walsh变换、中值滤波、二值化变换、亮度增减、傅立叶变换、反色、取对数、取指数、图像平移、图像旋转、图像细化、图像缩放、图像镜像、均值滤波、对比度拉伸、...
【基于MATLAB的简单图像处理】是一篇关于利用MATLAB进行图像处理的课程设计报告,主要涉及了图像处理的基本操作和常见变换。MATLAB作为一款强大的科学计算软件,其图像处理工具箱为图像处理提供了便利。 一、设计...
基于matlab可以对图片进行颜色识别并进行简单图像处理 一、基本功能:读取本地图片、实时采集图片、图像处理、结果保存 二、颜色识别:利用设置的RGB阈值对图片颜色进行分类并提取 三、灰度化:利用RGB通用比例...
### Windows Phone 7 平台简单图像处理技术详解 #### 一、概述 随着移动设备功能的日益增强,图像处理成为智能手机应用中的一个重要方面。Windows Phone 7 (WP7) 作为微软推出的一款操作系统,虽然在市场上已经...
本项目"基于MATLAB的字符识别和简单图像处理"是利用MATLAB进行图像预处理和字符识别的一个实例,主要涉及到以下几个核心知识点: 1. **图像二值化**:图像二值化是将图像上的像素点的灰度值设置为0或255,即将整个...
总的来说,这个MATLAB简单图像处理实验涵盖了数字图像的基本类型和转换方法,有助于深入理解图像的存储原理和处理技术。通过实际操作,我们可以更好地掌握如何在MATLAB环境中进行图像处理,包括灰度图像、RGB图像和...
本主题“简单图像处理”将引导初学者通过C#的Drawing类库来理解和实现基本的图像操作。C#作为.NET框架的一部分,提供了丰富的API来支持图形和图像处理,使得开发人员可以方便地进行图像的创建、读取、修改和显示。 ...
利用matlab实现了一个简单的图像处理软件,提供用户图像界面,并生成.exe可执行文件。提供的功能包括:图像显示空间域变换(RGB、HSV、YCBCR空间)、灰度变换、旋转(翻转)、伽马校正及滤波复原、频率域滤波、创意...