How to remove a header from a file that is .bmp using objective c

Question

How to remove a header from a file that is .bmp using objective c. I am getting 54 bytes extra. But in order to view image have to remove these 54 bytes and get actual image bytes.

NSData *data = [NSData dataWithContentsOfFile:snapshotFile options:0 error:&error];
NSBitmapImageRep *imagerep = [NSBitmapImageRep imageRepWithData:data];
NSData *bytes = [imagerep representationUsingType:NSBMPFileType properties:nil];

My image is of width = 1280 and height = 800, so total image bytes should be 800*1280*5= 4096000.
But when i checked for bytes calculated above it was 4096054 bytes. It seems that 54 extra is header. I want to remove these header bytes in order to get actual image.
Any help will be really appreciated. And please excuse in case this has already been answered.

Please excuse if its a basic question or discussed across different forums. I am new to the imaging part and did lot of googling, but not able to get the perfect understanding. — shiva tripathi, Jul 30 '15 at 12:46
I expect that you will get more answers if you post the code you have so far. — Eric Hauenstein, Jul 30 '15 at 12:52

score 0 · Answer 1 · edited May 23 '17 at 11:43

0

BMP is the native bitmap format of Windows and is used to store virtually any type of bitmap data. For Cocoa/Cocoa-touch, we typically use PNG. As for reducing the size of an image programmatically in Objective-C, please:

Refer to this!

edited May 23 '17 at 11:43

Community

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answered Jul 30 '15 at 12:52

Abhinav

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I am using the image for displaying it in case of remote management. That is why I require uncompressed image. – shiva tripathi Jul 30 '15 at 13:01

How to remove a header from a file that is .bmp using objective c

1 Answers1