How to create Image from unsigned char *

Question

I am trying to create a new Image from raw data in unsigned char *. I have the bits per pixel from the data stored. I tried converting raw data into NSData, But result image

Answer 1

The following code creates a UIImage instance from raw pixel data assuming you have:

• pixelData: the raw pixel data
• imageWidth, imageHeight: the image dimensions
• scanWidth: the number of bytes per scanline
• bytesPerPixel: the number of bytes used per pixel, usually 4

The resulting UIImage is assigned to the variable uiImage.

CGDataProviderRef provider = CGDataProviderCreateWithData(
    NULL, 
    pixelData, 
    imageHeight * scanWidth, 
    NULL);

CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;

CGImageRef imageRef = CGImageCreate(imageWidth,
    imageHeight,
    8,
    bytesPerPixel * 8,
    scanWidth,
    colorSpaceRef,
    bitmapInfo,
    provider,
    NULL,
    NO,
    renderingIntent);

UIImage *uiImage = [UIImage imageWithCGImage:imageRef];
CGDataProviderRelease(provider);
CGColorSpaceRelease(colorSpaceRef);
CGImageRelease(imageRef);