Member Avatar for thiru.y

hi,

I am a newbie learning c++ ..I would like to know how Images r loaded in C++ and if it can handle and execute basic image manipulations and also filters ,also whats the maximum amount of bitdepth for images (if there is a upper threshold) that can be handled by c++
Thankz

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Practical primer for and other beginners.

C++ does not include built-in image I/O; projects normally use third-party libraries to decode/encode file formats and then operate on the raw pixel buffer. A common workflow is: load into a contiguous buffer (bytes or floats), convert to a convenient working format (often normalized floats), apply filters (convolution, morphological ops, color transforms), then quantize and write back. The language itself places no fixed “bit‑depth” ceiling — limits come from the format spec, the library used, and available memory.

Good, practical starting points: the single-file stb loaders/writers are simplest to drop into a project (stb_image.h / stb_image_write.h) and are perfect for learning and small tools; OpenCV provides a large, well-optimized set of image-processing primitives for experimentation and production; use libpng/libjpeg/libtiff when format-specific control is needed; use OpenEXR for high‑dynamic‑range / floating‑point image work. (github.com)

Bit-depth notes: many consumer formats are 8 bits per channel by default; PNG supports up to 16 bits per sample; TIFF and specialized formats can store 16/32-bit integer or floating samples; HDR formats (OpenEXR, Radiance .hdr) are designed for 16/32-bit float per channel. For heavy processing, convert to float internally to avoid quantization/overflow and to make kernels and accumulation stable. (libpng.org)

Practical tips: treat image rows as stride + width + channels (watch alignment), be explicit about channel order (RGB vs BGR) and alpha premultiplication, cast accumulators to larger types when summing, and prefer separable kernels for speed (Gaussian blur). Start with stb_image to learn the basics and small filters; when ready to implement many algorithms, switch to OpenCV or a library with optimized routines. As hinted, small PNG writers are fine for practice, but pick tooling by required features (bit depth, HDR, speed, license).

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Member Avatar for Narue

>I would like to know how Images r loaded in C++
Very carefully.

>and if it can handle and execute basic image manipulations and also filters
Sure, why not?

>also whats the maximum amount of bitdepth for images (if
>there is a upper threshold) that can be handled by c++
You seem to be missing the point entirely, and I imagine some lame gimpy high level language is to blame. C++ can do damn near anything if you have to time and patience to do it. So when you ask "Can C++ do <soandso>?" the answer is invariably, "YES!".

Member Avatar for jhdobbins

>
C++ can do damn near anything if you have to time and patience to do it. So when you ask "Can C++ do <soandso>?" the answer is invariably, "YES!".

So it can clean my house and do my laundry? Sweet. :p

Member Avatar for Narue

>So it can clean my house and do my laundry?
Yes, assuming you have the necessary hardware accessories.

Member Avatar for thiru.y

Narue,

Thankz for the replies ..would appreciate if you can forward me in the right direction on image manipulations ...tutorial links if any would be of great help ..any more hints from you would be appreciated.

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