- the change to reduce region churn https://github.com/jcupitt/libvips/commit/6ae1888ab3a078f81fc50a967b38ac2aaefe4187 has broken sharing, try: vips sharpen k2.jpg x.jpg no colour info in x.jpg, we no longer detect and share buffers need to clear 'done' on the buffers? - some malloc/free cycling in vips sharpen in out it's as vips repeatedly discovers some sharing in buffer_ref_unref ... cycle is: - two regions share a single bufferA of calculated pixels - region1 moves to a new area ... buffer is shared, so region1 gets a new bufferB - region2 moves to the same area .. region1 is already there, so we share bufferB and unref bufferA, causing it to be freed - ... repeat! we get a malloc/free per tile to fix this, when we discover sharing, we need to not unref the private buffer and keep that around for possible later reuse each image needs a per-thread list of unreffed buffers ready for reuse done in branch "reserve", fix master as noted above and merge - vipsprofile needs a man page for Debian, I guess - new_heart.ws fails with libvips master - nip2 hist match is failing with 7.36, was working in 7.34 - do restrict on some more packages, we've just done arithmetic so far also resample, colour, some of conversion, create, - orc is poor for float stuff ... if vips_linear() had a "preserve type" option we could do something maybe a "uchar ouput" option? this seems to be a very common case - maybe avg? but avg doesn't subclass arithmetic, so we can't - for interpolate, we'd need to be able to unroll the vector, so the interpolator would need to be built for the bands / stride / type of the image need new API For this, since interpolators currently work for any image - do morph quickly as simple wrappers over the vips7 operations - do restrict on some more packages, we've just done arithmetic so far how about avg? do we need -ffast-math to vec that? yes we do, though it doesn't seem any faster how about avg? do we need -ffast-math to vec that? yes we do, though it doesn't seem any faster perhaps because it only vecs the innermost loop across bands and it's too short to trigger the vec code try swapping the loops over ... inner loop across width, outer across bands but then we'd have an unknown stride need to special-case 1 band and 3 band images or use orc to gen code at operator build does this mean we should revert the removal of orc from arithmetic? not seen more than x2 from auto-vec of abs(), perhaps the bool ops? - seen some leaks from vips dzsave --layout google wtc.jpg x investigate - vips_gaussblur() should switch to float prec if given a float image? same for vips_conv()? maybe precision is a dumb thing - support --strip for other writers - vipsthumbnail could shrink-on-load openslide and pyr tiff as well? - how about top -d 0.01 | grep vips > log to watch RES at 0.01s intervals? note on memuse page - use the webp advanced encoding api to set a write function for webp save to file - use g_log() instead of vips_info() - object construction is threadsafe, but class construction is not https://github.com/jcupitt/libvips/issues/64 we worked around this by adding vips_class_ping_all() to dsave build, but this is not a good fix find out why vips class construct fails, test on seurat, kirk's 24-core monster - quadratic doesn't work for order 3 start to get jaggies on lines --- the 3rd differential isn't being initialised correctly for the sub-region? seems fine vertically, only get errors on horizontal tile boundaries because we step across tiles left to right: y doesn't change, only x does - the operation cache needs to detect invalidate tricky! perhaps have operations always watching all of their inputs and resignalling "invalidate" themselves cache then just needs to watch for "invalidate" on operations it tracks need to add an "invalidate" signal to operation mosaic ====== - balance should use new meta stuff - histogram balance option? resample ======== - check mosaic1, global_balance, similarity etc. use of im__affine how can we move them to im_affinei ? - perspective transform with a matrix ... base it on the Lenz transformer, but partial foreign ======= - magick2vips should spot ICC profiles and attach them as meta - interlaced jpg needs massive memory, we should have two jpg read modes, like png - add more sequential mode readers $ grep -l write_line *.c csv.c matlab.c openexr2vips.c ppm.c radiance.c - foreign docs come up as "VipsForeignSave", annoying, why? - add nifti support http://niftilib.sourceforge.net/ - add matlab write - im_exr2vips can now use c++ api see TODO notes in openexr read (though they all need more openexr C API) consider openexr write - magick should set some header field for n_frames and frame_height? see also analyze - im_csv2vips() could use "-" for filename to mean stdin but then we'd have to read to a malloced buffer of some sort rather than an image, since we might need to grow it during the read, since we couldn't then seek packaging ========= - test _O_TEMPORARY thing on Windows - do we bundle "convert" in the OS X / win32 builds? if we don't we should convolution =========== - revisit orc conv use an 8.8 accumulator ... build the scale into the 8.8 coeffs ... no div at the end, just a shift need 8 x 8.8 -> 8.8 for each coeff though - im_conv()/im_morph() could have more than 10 programs? try 20 and see if we still have a speedup make a base class for vector area operations with a matrix with three vfuncs for init / generate code for one element / end and a gslist of programs, use that as the base for morph and conv wait for vipsobject for this - we have aconv and aconvsep test timing, make sure it;s worth having a separate aconvsep version if it is, make im_aconvsep an optimisation: call im_aconvsep_raw() from vips_conv() if mask width or height == 1 and prec == APPROX now we can get rid of im_aconvsep() since it's just vips_convsep() with prec set to approx aconv needs some more work, get it going at least with gaussian arithmetic ========== - avg/dev etc. should uncode images? eg. labq2lab etc. how about ifthenelse? - HAVE_HYPOT could define a hypot() macro? - fix a better NaN policy should we not generate images containing NaN (eg. divide tries to avoid /0), or should vips_max() etc. try to avoid NaN in images (eg. vips_max() takes a lot a care to skip NaN, though vips_stats() does not)? iofuncs ======= - need vips_image_invalidate_area() - look at libpeas for plugin support http://live.gnome.org/Libpeas - how about vips max add[babe.jpg,babe2.jpg] does that make any sense? vips copy add[babe.jpg,add[babe2.jpg,babe3.jpg]] sum.v perhaps use curly brackets for code? vips max add{babe.jpg,babe2.jpg} no brackets or square brackets for options - transform_g_string_array_image() can't handle quoted strings, so filenames with spaces will break is there an easy fix? can we reuse code from the csv parser? the csv parser just parses FILE* streams, we'd need to break it out - note member free stuff in vipsobject docs should boxed get freed in finalise rather than dispose? vipsobject has few docs atm :( - vips_object_set_argument_from_string() needs more arg types must be some way to make this more automatic - generate the code for vips_add() etc. automatically? it might be nice to have them all in one place at least - what does G_UNLIKELY() do? can we use it? - look into G_GNUC_DEPRECATED for back compat in vips8 - should im_rwcheck() copy to disc? maybe im_rwcheck_disc() copies to im->filename and maps that rather awkward to do atm with the way check.c is structured swig ==== - swig is not wrapping im_project() correctly ... returns an extra VImage via a param - doc strings would be nice, read the SWIG notes on this new bindings ============ - new binding is still missing constants how do boxed types work? confusing we need to be able to make a VipsArrayDouble - Vips.Image has members like chain, __subclasshook__ etc etc, are we really subclassing it correctly? - add __add__ etc overloads freq_filt ========= - fft with odd width or height is broken ... DC ends up in the wrong place libvipsCC ========= - need new C++ API - need an im_init_world() for C++ which does cmd-line args too, so C++ progs can get --vips-progress and stuff automatically tools ===== - need a way to make the vips.1 etc. man pages gtk has things like docs/reference/gtk/gtk-update-icon-cache.xml and man pages are made from that with xslt - get rid of a lot of the command-line programs, who wants to write a man page for batch_image_convert etc yuk - can we make man pages for the API as well? probably not from googling a bit - rename header, edvips as vipsheader, vipsedit maybe have back compat links? new operations ============== - bilateral filtering, see: http://en.wikipedia.org/wiki/Bilateral_filter http://www.shellandslate.com/fastmedian.html http://people.csail.mit.edu/sparis/bf_course/ also a mail from Martin Breidt has links to several fast free C implementations - http://en.wikipedia.org/wiki/Otsu%27s_method - non-linear sharpen: replace each pixel by the lightest or darkest neighbour depending on which is closer in value - look at There is an order 1 algorithm for doing medians over boxes (truly O(1) per pixel: I checked it carefully; it's like doing means over boxes in order 1 per pixel) in OpenCV since February 2012 I think, due to Perreault (and Hebert). It appears to be well respected, at least for 8-bit medians. Very memory intensive. Simple and elegant. No clue if it fits VIPS well (probably not?). Article: nomis80.org/ctmf.pdf - check CMC equations against web http://en.wikipedia.org/wiki/Color_difference#CMC_l:c_.281984.29 - see http://www.dentistry.bham.ac.uk/landinig/software/cdeconv/cdeconv.html sounds useful for BM?