[sane-devel] Epson Perfection V37/v200 support SANE.

[Camil Băncioiu]

Does anyone know to whom should I send the modified function which enables
16-bit scanning in Linux? It would be great if the official Epson driver
will integrate it.

On Wed, Sep 5, 2018 at 4:35 PM Camil Băncioiu <ioan.camil.bancioiu at gmail.com>
wrote:

> I didn't know to whom should I give my modified "dip_apply_color_profile",
> but I'm glad I caught someone's attention. Could this be integrated in the
> official driver?
>
> On Wed, Sep 5, 2018 at 4:28 PM Camil Băncioiu <
> ioan.camil.bancioiu at gmail.com> wrote:
>
>> Sure, here's the modified "dip_apply_color_profile":
>>
>> void
>> dip_apply_color_profile (const void *self, const buffer *buf,
>>                          const double profile[9])
>> {
>>   SANE_Int i;
>>   SANE_Byte *r_buf, *g_buf, *b_buf;
>>   double red, grn, blu;
>>
>>   SANE_Byte *data;
>>   SANE_Int size;
>>
>>   require (dip == self && buf && profile);
>>
>>   log_info("Using %d bits per channel.", buf->ctx.depth);
>>   if (SANE_FRAME_RGB != buf->ctx.format)
>>     return;
>>
>>   log_info("Buffer size: %d", size);
>>
>>   if (16 == buf->ctx.depth) {
>>     uint16_t *p = (uint16_t *) buf->ptr;
>>     uint16_t *e = (uint16_t *) buf->end;
>>
>>     uint16_t red_16, grn_16, blu_16;
>>
>>     while (p < e)
>>     {
>>       red_16 = p[0];
>>       grn_16 = p[1];
>>       blu_16 = p[2];
>>       red =
>>         profile[0] * (red_16) + profile[1] * (grn_16) + profile[2] *
>> (blu_16);
>>       grn =
>>         profile[3] * (red_16) + profile[4] * (grn_16) + profile[5] *
>> (blu_16);
>>       blu =
>>         profile[6] * (red_16) + profile[7] * (grn_16) + profile[8] *
>> (blu_16);
>>
>>       p[0] = clamp(red, 0, 0xFFFF);
>>       p[1] = clamp(grn, 0, 0xFFFF);
>>       p[2] = clamp(blu, 0, 0xFFFF);
>>       p += 3;
>>     }
>>   }
>>
>>   if (8 == buf->ctx.depth) {
>>
>>     data = buf->ptr;
>>     size = buf->end - buf->ptr;
>>
>>     for (i = 0; i < size / 3; i++) {
>>       r_buf = data;
>>       g_buf = data + 1;
>>       b_buf = data + 2;
>>
>>       red =
>>         profile[0] * (*r_buf) + profile[1] * (*g_buf) + profile[2] *
>> (*b_buf);
>>       grn =
>>         profile[3] * (*r_buf) + profile[4] * (*g_buf) + profile[5] *
>> (*b_buf);
>>       blu =
>>         profile[6] * (*r_buf) + profile[7] * (*g_buf) + profile[8] *
>> (*b_buf);
>>
>>       *data++ = clamp (red, 0, 255);
>>       *data++ = clamp (grn, 0, 255);
>>       *data++ = clamp (blu, 0, 255);
>>     }
>>   }
>> }
>>
>> Pay good attention to the compiling process, to ensure that the modified
>> driver properly replaces the default iscan driver. I think you had to pass
>> some very specific folder paths to the ./configure script (as command-line
>> arguments) to match with your system. This was required to make sure that
>> the driver finds the proper data files after compilation (the ones provided
>> by the iscan-data package).
>>
>>
>> On Tue, Sep 4, 2018 at 7:59 PM Robert A. Schmied <uwppp at flash.net> wrote:
>>
>>> aloha camil
>>>
>>> i note your prior message dated 4 aug 18 in which you list function
>>> void dip_apply_color_profile of the iscan package -- is this the part
>>> you are referring to when you write ".. edit the driver source code .."?
>>>
>>> regardless, for us casual hackers more specifics as to what to
>>> edit/change would be extremely helpful and greatly appreciated.
>>>
>>>
>>> ras
>>>
>>>
>>>
>>> Camil Băncioiu wrote:
>>> > Unfortunately, on Linux you will not have 16-bit scanning, only 8-bit,
>>> if
>>> > that is important to you. Scanning at 16-bit can be enabled, but you
>>> need
>>> > to edit the driver source code and compile it yourself. I have done so.
>>> >
>>> > On Sun, Sep 2, 2018 at 8:06 PM Yuri Chornoivan <yurchor at ukr.net>
>>> wrote:
>>> >
>>> >
>>> >>вівторок, 21 серпня 2018 р. 13:23:51 EEST Виктор Рыжков написано:
>>> >>
>>> >>>Hello, sane-developers!
>>> >>>Help me please. I am work in Vologda State Library.
>>> >>>We switched from Windows to ALT Linux, and we had problems with the
>>> Epson
>>> >>>Perfestion V37/V200 scanners. There are no official Epson drivers on
>>> the
>>> >>>ALT Linux.SANE does not support them. Do you have the opportunity to
>>> help
>>> >>>us in this matter?
>>> >>>Yours faithfully, engineer of support Viktor Ryzhkov.
>>> >>
>>> >>Hi,
>>> >>
>>> >>You can use drivers from the hardware manufacturer:
>>> >>
>>> >>http://download.ebz.epson.net/dsc/search/01/search/searchModule
>>> >>
>>> >>Just enter "V37" then download packages for your distribution (ALT is
>>> RPM-
>>> >>based, you should choose 32- or 64-bits RPM). Install those RPMs.
>>> >>Interface is
>>> >>very similar to the one for Windows.
>>> >>
>>> >>Works fine here for Epson Perfection V330 Photo (same family) on
>>> Mageia 6,
>>> >>64-
>>> >>bits.
>>> >>
>>> >>Hope this helps.
>>> >>
>>> >>Best regards,
>>> >>Yuri
>>> >>
>>> >>
>>> >>
>>> >>
>>> >>--
>>> >>sane-devel mailing list: sane-devel at alioth-lists.debian.net
>>> >>https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/sane-devel
>>> >>Unsubscribe: Send mail with subject "unsubscribe your_password"
>>> >>             to sane-devel-request at lists.alioth.debian.org
>>> >
>>> >
>>> >
>>>
>>>
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