Image notes

image, bbp/planes, meaning, results
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lena   8/3 rgb full color - ok
lena2  8/1 rgb vga palette - ok - decoder now tested
lena3  4/1 16 color palette - not implemented
lena4  1/4 16 color palette, bits striped - not implemented
lena5  See lena2
lena6  1/3  8 color palette, bits striped - not implemented
lena7  1/2  4 color palette, bits striped - not implemented
lena8  2/1  4 color palette - not implemented
lena9  1/1  2 color black/white - ok, check for border issues.
lena10 See lena3
---------------------------------------------------------------

Having worked through and vetted most of the code in the parental branch I want this code in the main branches, for regular use.

But there is still unvetted code, namely the 'filter::cleanup' and the higher-order image registrations (rotation, scale, affine, find-object), where I have run into roadblocks of understanding myself, and where I defer to Kevin for vetting.

To get the vetted pieces into the mainline, without having the unvetted parts this commit is made. It removes the unvetted pieces, puts them into a new branch, and this new branch will then be integrated with "works-for-critcl-2.1" and then "works-for-critcl-3".

The code is not lost, of course. It is still in the "x-smsaurabh" branch, and when Kevin has worked through it, it can then be integrated also. Leaf check-in: d7015891a3 user: andreask tags: integration-stage

Fixed the gausian noise as well, which has to use two uniformly distributed random numbers (radius, angle) to get one gaussian distributed value. check-in: 4b1c8ccdd5 user: andreask tags: x-smsaurabh

Moved the complex <-> float conversion to the 'convert' ensemble.

Extended the FOO -> complex conversion to directly allow greyN images as input.

I.e. we can now do a 1-step greyN -> complex conversion, instead of requiring the 2-step greyN -> float -> complex

Dropped the fpcomplex2real primitive, this is the same as 'convert 2float', and now implemented using the primitive for the conversion.

Extended 'split' and 'join' for image type 'fpcomplex'.

Updated all users, updated the documentation. check-in: bce7e722de user: andreask tags: x-smsaurabh

Swapped this operator's arguments as well. When width and height are used together they are pretty much everywhere used in this order (w, h). (Like in the result of crimp::dimensions). This enabled the simplification of the calls (single 'dimensions' instead of separate 'width' and 'height').

Exposed the operator as 'crimp noise random'; updated the documentation, and added demos. check-in: 08bc13765e user: andreask tags: x-smsaurabh

Plus fixes in the BMP reader: Bad return value, and data alignment when decoding pixel data is relative to the base location. Error messages modified to uniquely identify each location and problem. check-in: fc7e925cfb user: andreask tags: image-io-experiments

This replaces rev [1a2b5e973a] (moved to a mistake branch), and reverts part of rev [2e4a6fce26].

This change relies on functionality provided by critcl in rev [8299af2478] and forward. check-in: 62fc511af8 user: andreask tags: work-for-critcl-2.1

Furthermore fixed the issue of the missing M_PI definition as well. check-in: f3474ad7e1 user: andreask tags: work-for-critcl-2.1

Thanks to Pat Thoyts for the report. check-in: 7a934fa654 user: andreask tags: trunk

Modified the symmetric binary operators to not try argument reversal when the argument image types are identical, as then the second try is identical to the first, thus superfluous.

Filled the conversion of gradients from cartesian to polar representation, and added a method to generate a visualization of the gradient. check-in: 1d969fb0c3 user: andreask tags: ak-experimental

This was done because usage of the PGM format for the greyscale page images in the bookflow project showed that the conversion of the read PGM data to a crimp image was a big bottleneck, dominating the time to calculate the global brightness of the pages.

Using one the images as example (IMG_2291.pgm, 3264x2448) let us compare the before and after times for all the steps, for both the raw and plain sub-formats of PGM:

Much better. The time spent on calculating the statistics and reading the bytes is essentially the same, within error margins, and the parsing of the PGM format is an order of magnitude faster. check-in: 186b7b5109 user: andreask tags: ak-experimental

Applications of these are whitepoint correction, conversion between various colorspaces (CIE *, LMS, ...), etc.

Added convenience commands for various colorspace conversion matrices (RGB -> CIE XYZ, CIE XYZ -> LMS, RGB -> LMS (analogous to previous)).

Still need the inverse conversions.

Started on the CIE spaces, this is very incomplete, and the value ranges (domains) especially are not known, so the scaling is very likely very off.

Plus demos. check-in: 1cc2e4740f user: andreask tags: ak-experimental

Added the extended statistics to the hough demo. check-in: fc24897d1e user: andreask tags: ak-experimental

• [60254f4954] arbitrary affine transformations.
• [7068afa5f5] rotation through arbitrary angles and center.
• [f17efe0938] arbitrary projective transformations.
• [233e0d0b5a] general deformation through quadrilateral mapping.
• [126d0ace8f] bilinear/bicubic interpolation.

Re-added a resize method, now based on projective warp.

Renamed the 'crimp warp warp' to 'crimp warp field', in deference to the vector fields providing the sampling coordinates. And yes, it is a bit tongue-in-cheek re StarTrek.

Implemented the primitives for 'warp field'.

Demo for 'warp field', a blur mode like light scattering through milky acryl.

Documented 'resize, 'warp field' and the 'transform' methods.

New demos for quadrilateral mapping. check-in: 5a58eae505 user: andreask tags: warp-experiment

Even with the gcd to reduce sample factors it is to easy to run into large upsampling factors and massive memory consumption by the transient intermediate images. Just need new/old width/height which are relative prime (gcd == 1).

We need something which has all the three phases (upsample, convolve, downsample) integrated, avoiding intermediate full images.

Starting to look towards the 'matrix' primitive and command now. More general (projective transform), and having the resampling integrated into the output loop. It needs some fixing tough, as is it is not usable for the intended purpose.

When that is working however we can make resize and related commands simple wrappers around it, for convenience. check-in: bbe91135d7 user: andreask tags: ak-experimental